An actuator is a type of motor for moving or controlling a mechanism or system. It is operated by a source of energy, usually in the form of an electric current, hydraulic fluid pressure or pneumatic pressure, and converts that energy into some kind of motion. An actuator is the mechanism by which an agent acts upon an environment. The agent can be either an artificial intelligence agent or any other autonomous being human, other animal, etc. . Examples and applications Some examples of actuators of these various agents include Human Arms, hands, fingers, legs citation needed date March 2012 Part picking robot Grasping mechanism, moving parts. Examples include solenoids and voice coil actuators. citation needed date March 2012 Mail transfer agent Update software dubious date March 2012 In engineering, actuators are a subdivision of transducers . They are devices which transform an input signal mainly an electrical signal into motion. Electrical motors, pneumatic actuators , hydraulic pistons , relays , comb drives , piezoelectric actuators , thermal bimorphs , Digital Micromirror Devices and electroactive polymers are some examples of such actuators. Motors are mostly used when circular ... of the simple machine known as the screw. By rotating the actuator s nut, the screw shaft ... , rack and pinion , chain drive , belt drive , rigid chain actuator rigid chain and rigid belt actuator ... physics motion . Specific examples include electric motor electrical motors , pneumatic actuator s, Hydraulic drive system hydraulic actuator s, linear actuator s, comb drive , Piezoelectricity Actuators piezoelectric actuators and amplified piezoelectric actuator s, thermal bimorphs, micromirror ... efficiency The efficiency of an actuator is a standard tool used to calculate or estimate the usefulness ... Linear actuator Hydraulic actuator Pneumatic actuator References Reflist Refimprove date November ... id Aktuator is Gangsetningarb na ur it Attuatore nl Actuator ja no Aktuator nn Aktuator ... more details
Multiple issues context February 2012 orphan February 2012 unreferenced February 2012 A cam actuator is a linear actuator that functions on a principle similar to that of the Wedge mechanical device wedge . As a wheel like cam rotates, its eccentric shape provides thrust at the base of a shaft. Category Actuators technology stub ... more details
Refimprove date July 2008 File linear actuator basic.gif thumb 250px Conceptual design of a basic traveling nut linear actuator. Note that in this example the lead screw gray rotates while the lead nut yellow and tube red do not. A linear actuator is an actuator that creates motion in a straight line ... from a rotating motor. Types Mechanical actuators File mechanical linear actuator with digital readout.jpg thumb A mechanical linear actuator with digital readout a type of micrometer . File Roller .... By rotating the actuator s nut, the screw shaft moves in a line. Wheel and axle Hoist device Hoist , winch , rack and pinion , chain drive , belt drive , rigid chain actuator rigid chain and rigid belt actuator rigid belt actuators operate on the principle of the wheel and axle. A rotating wheel ... Devices Source book, 4th Edition 2007 , 25, McGraw Hill ref Cam Cam actuator s function on a principle ... such as a cam actuator . Pneumatic and hydraulic cylinders, or lead screw can be designed to provide ... or car jack is a familiar mechanical actuator. Another family of actuators are based on the segmented ... actuator is a Bottle jack hydraulic car jack . Typically though, the term hydraulic actuator ... their expansion in a repeatable manner. Electro mechanical actuators File linear actuator photo.jpg thumb A miniature electro mechanical linear actuator where the lead nut is part of the motor. The lead ... or retracted. File multi cylinders.gif thumb Typical compact cylindrical linear electric actuator File actuator box.gif thumb Typical linear or rotary linear electric actuator File actuator.ogv thumb ... with an electric motor. Rotary motion of the motor is converted to linear displacement of the actuator ... electro mechanical linear actuator. Simplified design Typically, an electric motor is mechanically ... from rotating with the lead screw typically the nut interlocks with a non rotating part of the actuator ... an actuator for a particular application, the most important specifications are typically travel ... more details
File Schwenkantrieb auf klappe.jpg thumb upright Electric rotary valve actuator controlling a butterfly valve A rotary actuator is an actuator that produces a rotation rotary motion or torque . The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators though are electrically powered. Other actuators may be powered by pneumatic or hydraulic power , or may use energy stored internally through springs. The motion produced by an actuator may be either continuous rotation, as for an electric motor , or movement to a fixed angular position as for servo s and stepper motor s. A further form, the torque motor , does not necessarily produce any rotation but merely generates a precise torque which then either causes rotation, or is balanced by some opposing torque. Actuator power sources Electric actuators Stepper motors File Electronic component stepping motors.jpg thumb The variety of stepper motor s main Stepper motor Stepper motors are a form of electric motor that has the ability to move in discrete steps of a fixed size. This can be used either to produce continuous rotation at a controlled speed or to move by a controlled angular amount. If the stepper is combined with either a rotary encoder position encoder or at least ... position and so to act as a rotary actuator. Servomotors File Disassembled RC servomechanism.jpg thumb ... of ultra lightweight actuator uses memory wire . As a current is applied, the wire is heated above ... actuator url http www.sparkfun.com datasheets Robotics NM70R 6P.pdf publisher SparkFun Electronics ... actuator, using a rack and pinion Both hydraulic and pneumatic power may be used to drive an actuator ... Hydraulics Pneumatics Cite web title Rotary actuator designs publisher Hydraulics & Pneumatics url ... turn oscillating vane actuator. Such windscreen wipers worked adequately when the engine was running ... torque ref that are only used as display devices, such as air core gauge s. Others include valve actuator ... more details
refimprove date March 2008 Image Power plant a.jpg 500px thumb Electric actuator on a valve in a power plant Actuator s are used for the automation of valves industrial valves and can be found in all kinds ... diameter of the valve. Each movement type requires a specific actuator type. Image Gate valve a.jpg 120px thumb Electric multi turn actuator on a gate valve Multi turn actuators Multi turn actuators ... ISO 5210 as follows A multi turn actuator is an actuator which transmits to the valve a torque for at least ... valve disc. The multi turn actuator moves the gate valve disc from OPEN to CLOSED and vice versa via a stem nut. To cover the complete valve travel, the so called valve stroke, the actuator has to perform ... valves are exclusively automated by means of electric multi turn actuators. The multi turn actuator ... part turn actuator on a butterfly valve Part turn actuators Part turn actuators are required for the automation ... as follows A part turn actuator is an actuator which transmits a torque to the valve for less than one ... housing, i.e. the weight of the closing element does not act upon the part turn actuator. This is expressed ... against this pressure. Most of the linear actuators used are pneumatic diaphragm actuator s. They are characterised ... which can easily be supplied with power. Design Image Actuator cutaway.jpg 500px thumb left Electric multi turn actuator with controls ref Baumann, Oliver http www.auma.com cms AUMA en documents ... attachment consists of two elements. First The flange used to firmly connect the actuator to the counterpart .... Second The output drive type used to transmit the torque or the thrust from the actuator to the valve ... or power failure. The handwheel does not move during motor operation. Actuator controls 6 Both actuator signals and operation commands of the Distributed control system DCS are processed within the actuator controls. This task can in principle be assumed by external controls, e.g. a Programmable ... on the signals or commands present. Another task of the actuator controls is to provide the DCS ... more details
Intelligent Actuator , also called IAI , is a robotics design company. It was founded in Japan in 1976. The company designs, manufactures, and markets a complete line of motion control systems. IAI is the world s largest manufacturer of cartesian coordinate robot s and is an established leader in low cost, high performance SCARA robot s. ref http www.intelligentactuator.com products ix scara.php , IAI America website SCARA ref Infobox Company name IAI International Automation Industry logo Image IAIlogo.svg type Public company Public Kabushiki kaisha KK foundation 1976 founder location Shizuoka Prefecture , Japan key people area served Worldwide industry Manufacturing , Robotics , Automation products revenue operating income net income num employees parent homepage http www.intelligentactuator.com www.iai robot.co.jp footnotes intl yes With the introduction in 2001 of a full range of ROBO Cylinders , IAI is also leading a transition away from pneumatics to cost effective, low maintenance, and fully programmable electric cylinders. IAI Industrieroboter GmbH is the European subsidiary of IAI, founded in 1995. IAI America, Inc. was established in 1989. IAI products are distributed in North America through a network of authorized representatives supported by regional centers in Los Angeles, CA , Chicago, IL , and Atlanta, GA . External links http www.intelligentactuator.com Intelligent Actuators listings Listings for intelligent actuators. http www.iai robot.co.jp Intelligent Actuator, Japan Global HQ http www.eu.iai gmbh.de Intelligent Actuator, European website http www.intelligentactuator.com Intelligent Actuator, USA website http www.alteks.com.tw Alteks Co., Taiwan website References Reflist 1 Category Robotics companies ja ... more details
Unreferenced date December 2009 A pneumatic actuator converts energy typically in the form of compressed air into motion. The motion can be rotary or linear, depending on the type of actuator. Some types of pneumatic actuators include Tie rod cylinders Rotary actuators Grippers Rodless actuators with magnetic linkage or rotary cylinders Rodless actuators with mechanical linkage Pneumatic artificial muscles Speciality actuators that combine rotary and linear motion frequently used for clamping operations Vacuum generators A Pneumatic actuator mainly consists of a piston, a cylinder, and valves or ports. The piston is covered by a diaphragm mechanical device diaphragm , or seal, which keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm downward, moving the piston underneath, which in turn moves the valve Stem valve stem , which is linked to the internal parts of the actuator . Pneumatic actuators may only have one spot for a signal input, top or bottom, depending on action required. Valves require little pressure to operate and usually double or triple the input force. The larger the size of the piston, the larger the output pressure can be. Having a larger piston can also be good if air supply is low, allowing the same forces with less input. These pressures are large enough to crush object in the pipe. On 100 kPa input, you could lift a small car upwards 1,000 lbs easily, and this is only a basic, small pneumatic valve. However, the resulting forces required of the stem would be too great and cause the valve Stem valve stem to fail. This pressure is transferred to the valve stem, which is hooked up to either the valve plug see plug valve , butterfly valve etc. Larger forces are required in high pressure or high flow pipelines ... which has a constant out flow, and a varied in flow varied by the actuator and valve . A pressure ... cylinder Pneumatics DEFAULTSORT Pneumatic Actuator Category Actuators pl Si ownik pneumatyczny ru ... more details
Plasma actuators are a type of actuator currently being developed for aerodynamic flow control . Plasma physics Plasma actuators impart force in a similar way to ionocraft . File Streamwise.JPG thumb Glow of plasma actuator discharges Introduction Plasma actuators operating at the atmospheric conditions are promising for flow control, mainly for their physical properties, such as the induced body force by a strong electric field and the generation of heat during an electric arc, and the simplicity of their constructions and placements. In particular, the recent invention of glow discharge plasma actuators by Roth 2003 ref Roth, J. R. 2003 . Aerodynamic flow acceleration using paraelectric and peristaltic electrohydrodynamic effects of a one atmosphere uniform glow discharge plasma OAUGDP . Physics of Plasmas, 10 5 , 1166 1172. ref that can produce sufficient quantities of glow discharge plasma in the atmosphere pressure air helps to yield an increase in flow control performance. File SpanwiseActuatorYVelocity.jpg thumb Local flow speed induced by a plasma actuator Power supply and electrode layouts Either direct current DC or alternating current AC power supply can be used for different ... barrier discharge plasma actuator is given here as an example. The performance of plasma ..., X. 2007 . An atmospheric plasma actuator for aeroacoustic applications. IEEE Transactions on Plasma Science, 35 3 , 693 695. ref . File Actuator Setup.tiff thumb Pluse width modulation of plasma power ... of DBD plasma actuator File Plasma Actuator2.tiff thumb One configuration of DBD plasma actuator .... Vortex generator A plasma actuator induces a local flow speed perturbation, which will be developed ... refer to Tonal versus broadband can be actively attenuated by a carefully designed plasma actuator ... number aerodynamics using dielectric barrier discharge actuator. Progress in Aerospace Sciences, 47 ... List of plasma physics articles References Reflist DEFAULTSORT Plasma Actuator Category Plasma physics ... more details
Image Scratch Drive Actuator.gif right Scratch Drive Actuator A Scratch Drive Actuator SDA is a Microelectromechanical system device that converts electrical energy into one dimensional motion. The actuator component can come in many shapes and sizes, depending on the fabrication method used. It can be visualised as an L . The smaller end is called the bushing . The actuator sits on top of a substrate that has a thin insulating dielectric layer on top. A voltage is applied between the actuator and the substrate and the resulting potential pulls the body of the actuator downwards. When this occurs, the brush is pushed forwards by a small amount and energy is stored in the strained actuator. When the voltage is removed, the actuator springs back into shape while the bushing remains in its new position. By applying a pulsed voltage, the SDA can be made to move forward. The voltage is usually applied to the actuator by means of a tether . This can consist of a rigid connector or a rail which the SDA follows. ref http www.networkworld.com community node 28328 Dancing microrobots ref The size of an SDA is typically measured on the m scale. References reflist Category Actuators Category Microtechnology Category Microelectronic and microelectromechanical systems ... more details
File RigiBelt Patent.jpg thumb right Patent Drawing for Serapid RigiBelt Rigid Belt Actuator 2007 . A rigid belt actuator , also known as a push pull belt actuator or zipper belt actuator , is a specialized mechanical linear actuator used in push pull and lift applications. The actuator is a Belt mechanical belt and pinion device that forms a telescoping beam or column member to transmit traction and thrust. Rigid belt actuators can move dynamic loads up to approximately 230 pounds over about 3 feet of travel. ref Serapid RigiBelt brochure http www.serapid.us PDF rigibelt the new non magnetic telescopic linear actuator.pdf ref Principle of operation Rigid belt actuators can be thought of as rack and pinion devices that use a flexible rack. Rigid belt actuators use two reinforced plastic Belt mechanical Ribbed belt ribbed belt s, that engage with pinions mounted on drive shafts within a housing. The belts have evenly spaced load bearing blocks on the non ribbed face. As the pinions spin, the belts are rotated 90 degrees through the housing, which interlocks the blocks like a zipper into a rigid linear form. The resulting beam or column is effective at resisting tension and compression buckling . Because the actuating member can fold on itself, it can be stored relatively compactly in a storage magazine, either in an overlapping or coiled arrangement. The actuator is driven by an electric motor. Development A rigid belt actuator is effectively a non metallic variation of the rigid chain actuator. But, while the interlocking chain actuator has been around since the middle of the 20th century, rigid belt technology didn t emerge until the new millennium. ref cite patent US 1925194 ref ref cite patent US 2554300 ref Jo l Bourc His received a patent for his Linear Belt Actuator in 2007. ref cite patent US 7270619 ref References Reflist See also Linear actuator Rigid chain actuator External links http serapid.us rigidbelt.html Serapid RigiBelt Category Actuators ... more details
File Spiralift Patent.jpg thumb right Patent Drawing for Spiralift Actuator 1989 , with legend. A helical band actuator , generally known by the trademark Spiralift , is a complex and specialized linear actuator used in Elevator Stage lifts stage lifts and Material handling equipment material handling lifts. The actuator forms a high capacity telescoping tubular column lifting capacities to 25,000 pounds, travel to 40 feet . ref Spiralift Specifications http www.galainfo.com pdfs spiralift3 eng.pdf ref Raison d tre Pierre Gagnon was awarded a US patent for the Push Actuator in 1989. ref cite patent US 4875660 ref Gagnon developed the actuator to substitute hydraulic cylinder s in stage and orchestra lift systems. Hydraulic Jack device jacks were the predominant push actuators used in performing arts facilities, but they had their issues. The piston rods of a hydraulic lift extend below the platform they support by more than the length that the lift travels. For lifts at grade, housings for the rods are often sunk into support holes, known as caissons, that are inaccessible and often complicated by groundwater levels. If placed above ground, the space occupied by the rod housings is unusable. Gagnon s actuator eliminates caissons and reduces the volume of unusable space below the platform of the lift. Another significant issue with hydraulic lifts is platform drift, the tendency of a platform to lower due to depressurization of the hydraulic system over time. Helical band actuators do not suffer from platform drift because they are rigid mechanical devices. Traveling nut jackscrew screw jacks and rigid chain actuator s can also be effective at addressing these issues with hydraulic jacks, and are also used for stage lifts. Principle of operation The telescoping column is formed ... Lift scissor lift . See also Linear actuator Segmented spindle Elevator Stage lifts Stage lifts References ... DEFAULTSORT Helical Band Actuator Category Actuators ... more details
primarysources date April 2009 The Camcon Binary Actuator is a digital valve device used by oil and gas operators and sold by Camcon Technology . External links http www.camcontec.com Camcon Technology Category Valve timing tradenames Category Gas technologies Category Digital technology ... more details
File Rigid Chain Actuator.gif 300px right Rigid chain actuator. A rigid chain actuator , known variously as a linear chain actuator , push pull chain actuator , electric chain actuator or column forming chain actuator , is a specialized mechanical linear actuator used in window operating, push pull material handling and lift applications. The actuator is a chain and pinion device that forms an articulated telescoping member to transmit traction and thrust. High capacity rigid chain lifting columns Jack device jacks can move dynamic loads exceeding 10 tonnes US 20,000 pounds over more than 7 metres 20 feet of travel. ref Serapid lifting column brochure http serapid.us PDF Linear Tele Lifting Col.pdf ref Principle of operation File Serapid LinkLift Patent.jpg thumb right Patent Drawing for Serapid LinkLift Rigid Chain Actuator 2001 . Rigid chain actuators function as rack and pinion linear actuators that use articulated racks. Rigid chain actuators use limited articulation chains, usually resembling a roller chain , that engage with pinions mounted on a drive shaft within a housing. The links of the actuating member, the rigid chain , are articulated in a manner that they deflect from a straight line to one side only. As the pinions spin, the links of the chain are rotated 90 degrees through the housing, which guides and locks the chain into a rigid linear form effective at resisting tension and compression buckling . Because the actuating member can fold on itself, it can be stored relatively compactly in a storage magazine, either in an overlapping or coiled arrangement. Rigid ... Rigid Chain Actuator 1972 . Modified roller chain has been used extensively in material handling equipment ... distinction between types of rigid chain actuator is whether the actuating member is formed ... to back arrangement of the typical interlocking chain actuator, a third chain was interlocked between ... are not common. References Reflist See also Linear actuator Rigid belt actuator External links http ... more details
An idle air control actuator or idle air control valve IAC actuator valve is a device commonly used in Fuel injection fuel injected vehicles to control the engine s idling RPM. In Carburettor carburetted vehicles a similar device known as an idle speed control actuator is used. Description The IAC actuator is basically an electrically controlled valve , which gets its input from the vehicle s Engine control unit ECU . The valve is fitted such that it bypasses the actual throttle valve. The actuator consists of a solenoid that controls a plunger valve which variably restricts air flow through the device s body. Electric current through the solenoid determines how much or less the plunger constricts air flow which means that the amount by which the valve opens can be controlled by an electric current. Thus, the ECU can control the amount of air that bypasses the throttle when the throttle is fully closed, thereby controlling the engine s idle RPM. Without the IAC, the only way to control idling is by adjusting the throttle valve itself this may be inefficient in terms of mileage and or emissions. Electronically controlling the air enables allowing just the right amount of air needed to maintain the designated idle RPM irrespective of the ambient and or engine conditions. This also allows the ECU to dynamically respond to changes in engine load where the driver does not press the accelerator whilst putting the vehicle in gear i.e., anti stall feature . Thus the driver can more easily move the car from stand still by merely releasing the clutch manual transmission or the brake automatic transmission without having to simultaneously press the accelerator pedal. Problems with IAC Although the IAC is supposed to last the vehicle s lifetime, various reasons may cause it to fail malfunction prematurely. The most common failure mode is partial complete jamming of the valve due to dirt dust or even oil where it cannot be smoothly controlled. The result is an engine that idles very ... more details
Mechanisms Flextensional Piezo Actuator Operation ref Actuators of this type can have a stroke of 2 mm. Multi cell actuator In diamond shaped amplifiers, using 4 piezo crystals instad of one ... Diamond actuator for aerospace.pdf New actuators for aerospace Noliac . Retrieved 28 September .... The most commonly used technology is the amplified piezoelectric actuator. ref name flapact External ... Amplified Piezoelectric Actuator Category Actuators ... more details
The Neural Impulse Actuator NIA is a brain computer interface BCI device developed by OCZ Technology . BCI devices attempt to move away from the classic input devices like keyboard and mouse and instead read electrical activity from the head, preferably the Electroencephalography EEG . The name Neural Impulse Actuator implies that the signals originate from some neuronal activity however, what is actually captured is a mixture of muscle, skin and nerve activity including sympathetic and parasympathetic components that have to be summarized as Signal biology biopotentials rather than pure neural signals. As of May 27, 2011, the OCZ website says that the NIA is no longer being manufactured and has been end of lifed. http www.ocztechnology.com nia game controller eol.html Name The name Neural Impulse Actuator is still justifiable since also the secondary signals are under neuronal control. The biopotentials are Fast Fourier Transform decompiled into different frequency spectra to allow the separation into different groups of electrical signals. Individual signals that are isolated comprise alpha and beta brain waves, electromyograms and Electrooculography electro oculograms . The current version of the NIA uses carbon fibers injected into soft plastic as Substrate materials science substrate for the headband and for the sensors and achieves sensitivity much greater than the original ... actuator ref No specifications have been published. People who are trying to make use of the device ...?page news item&px NjM5Nw title OCZ Neural Impulse Actuator On Linux? author Michael Larabel publisher ... products ocz peripherals nia neural impulse actuator http www.ocztechnologyforum.com forum ... Actuator Confirmed 159.html http www.hothardware.com printarticle.aspx?articleid 1178 Complete ... Actuator fr Actuateur d impulsions neuronales nl Neural Impulse Actuator ja ru Neural Impulse Actuator ... more details
A MEMS thermal actuator is a micromechanical device that typically generates Mo physics motion by thermal expansion Amplifier amplification . A small amount of thermal expansion of one part of the device translates to a large amount of deflection of the overall device. Usually fabricated out of Doping semiconductor doped Silicon Single Crystal Silicon or Polycrystalline silicon Polysilicon as a complex compliant member , the increase in temperature can be achieved internally by electrical resistive heating or externally by a heat source capable of locally introducing heat. Types of thermal actuators Asymmetric bimorph ref Guckel H, Klein J, Christenson T, Skrobis K, Laudon M, and Lovell EG, Thermo magnetic metal flexure actuators , Technical Digest, 1992 Solid State Sensors and Actuators Workshop Hilton Head, SC, USA 1992 73 5 ref ref Comtois J, Bright V, Surface Micromachined Polysilicon Thermal Actuator Arrays and Applications , Technical Digest, 1996 Solid State Sensors and Actuators Workshop Hilton Head, SC, USA 1996 174 7 ref Symmetric bent beam, chevron ref Que L, Park J S and Gianchandani Y B 1999 Bent beam electro thermal actuators for high force applications IEEE Int. Conf. on Microelectromechanical systems MEMS pp 31 6 ref ref Sinclair M J 2000 A high force low area MEMS thermal actuator Proc. 7th Intersociety Conf. on Thermal and Thermomechanical Phenomena Las Vegas, NV pp 127 32 ref Other types of MEMS Actuators Electrostatic parallel plate or comb drive Magnetic Piezoelectric References reflist Category Actuators Category Materials science Category Nanoelectronics Category Microtechnology ... more details
orphan date June 2009 The term Variable Control Voice Actuator VCVA refers to a digital recording technology developed by Olympus company Olympus , which is implemented in many of their digital voice recorder s. ref name Olympus http 74.125.95.104 search?q cache QBNV1f4qpmgJ resources.olympus europa.com consumer service C1256F17001FD37E4F1A57B3D91D11D3C1256FF10047E9C7 VCVA.pdf Variable Control Voice Actuator&hl en&ct clnk&cd 2&gl us&client opera Olympus Imaging Europe VCVA ref It prevents the recording of silence, so pauses in a speaker s dictation do not waste time, power or recording space. Function When the microphone picks up an arbitrary level of sound, the VCVA initiates recording, and when volume detected by that microphone dips down below said threshold the VCVA stops recording. ref name Olympus References reflist Category Digital audio recording Electronics stub ... more details
Orphan date May 2011 A MEMS Magnetic Actuator is a device that uses the MEMS process technology to convert an electrical signal current into a mechanical output displacement by employing the well known Lorentz force Lorentz Force Equation or the theory of Magnetism . Overview of MEMS Micro Electro Mechanical System MEMS Technology ref cite book last Senturia, first S. title Microsystems Design ref is a process technology in which mechanical and electro mechanical devices and structures are constructed using special Microfabrication Micro fabrication Techniques . These Techniques include Bulk Micro Machining, Surface Micro Machining, LIGA, Wafer Bonding etc. br A device is considered to be a MEMS device if it satisfies the following If its feature size is between 0.1 um and 100s of microns. below this range, it becomes a Nano device and above the range, it is considered a Mesosystem. If it has some Electrical functionality in its operation. This could include the generation of voltage by Electromagnetic Induction, by changing the gap between 2 electrodes or by a piezoelectric material. If the device has some mechanical functionality such as the deformation of a beam or diaphragm due to stress or strain. If it has a system like functionality. The device must be integrable to other circuitries to form system. This would be the interfacing circuitry and packaging for the device ... of a mechanical structure e.g A synthetic Jet Actuator. Power Generation generates power from ... thumb right 300px Magnetic Actuation Governing Equations and Parameters A typical MEMS actuator ... are ref cite journal last Wagner, first B. coauthors w. Benecke, title Microfabricated Actuator ... Magnet Material Selection for Static B Field The operation of the Magnetic Actuator depends on the interaction ... of device that is to be constructed. Applications of the Magnetic Actuator include the synthetic Jet actuator, Micro pumps and micro relays. References references After listing your sources please ... more details
Actuator on the F 18 Systems Research Aircraft , NANASA TM 97 206224, October 1997 Stefan Frischemeir ... Aircraft components Aviation lists DEFAULTSORT Electro Hydrostatic Actuator Category Aircraft ... more details
A segmented spindle , also known by the trademark Kataka , is a specialized mechanical linear actuator conceived by the Danish mechanical engineer Jens Joerren Soerensen during the mid 1990s. ref Article from Eureka Magazine http www.shelleys.demon.co.uk foct03.htm ref The actuator forms a telescoping tubular column, or spindle, from linked segments resembling curved parallelograms. The telescoping linear actuator has a lifting capacity up to 200 kg 440 pounds for a travel of 400 mm 15.75 inches . ref Technical Specifications KATAKA 400 http kataka.dk media technical 20spec 20sheet kataka technical spec sheet 08.08.pdf ref A short elongated housing forms the base of the actuator and includes an electrical gear drive and storage magazine for the spindle segments. The drive spins a helically grooved wheel that engages the similarly grooved inside face of the spindle segments. As the wheel spins it simultaneously pull the segments from their horizontal arrangement in the magazine and stacks them along the vertical path of a helix into a rigid tubular column. The reverse process lowers the column. See also Helical band actuator Rigid belt actuator Rigid chain actuator References Reflist External links http www.kataka.dk Kataka web site YouTube OiPU9BGQL2M Linear actuator based on the segmented spindle commons category Gears Category Actuators Category Hardware mechanical Category Gears tech stub ... more details
An angle seat piston valve is a Pneumatics pneumatically controlled valve with a piston Pneumatic actuatoractuator providing linear actuation to lift a seal off its seat. The seat is set at an angle to provide the maximum possible flow when unseated. Angle seat piston valves are particularly suited to applications where high temperatures and large flowrates are required, such as steam or water. When used in reverse some models of angle seat piston valve will eliminate water hammer when operated. Operation Pneumatic valves are operated by a pilot medium under pressure, usually compressed air but also oil or water. The valve is equipped with a pneumatic actuator supplied by a three way solenoid valve . The pressure of the pilot medium enters the actuator cylinder and acts on the piston, which allows the seal to open or to close through the stem. The return of the seal into its rest position is usually achieved by a return spring that can be found in the pneumatic actuator. In the double acting configuration there is no return spring and the pilot medium is used both for opening and for closing the valve. A red indicator becomes visible through the sight dome that is found on the top of the actuator when the valve is in the open position. The pressure range depends on the pressure of the pilot medium and the controlled medium and on the direction of the flow, but also on construction parameters of the valve, such as the diameter of the orifice, the diameter of the actuator cylinder and the spring force. See also Piston valve Category Valves ... more details
Redundancy Actuator can remain functional even after several elements are at fault. This property is also called graceful degradation . Fault tolerant operation in the presence of actuator faults requires ... actuator failts, the remaining actuator can always keep the system operation. While this approach ... actuator s to provide intrinsic fault tolerance. To achieve this, a high number of small actuator elements are assembled in parallel and in series to form one actuator see Series and parallel circuits . Faults within the actuator will affect the maximum capability, but through robust control ... performance even in the presence of multiple faults in the actuator elements. Using actuation elements in series An important feature of the high redundancy auctuation is that the actuator elements ..., there is one fault that is difficult to deal with in a parallel arrangement the locking up of one actuator element. Because parallel actuator elements always have the same extension, one locked up element ... for the High Redundancy Actuator, as fault tolerance is required for different fault types. The goal of the HRA project is to use parallel and serial actuator elements to accommodate both the blocking ... actuation is technology agnostic it should be applicable to a wide range of actuator technology, including different kinds of linear actuator s and rotational actuators. However, initial experiments are performed with electric actuator s, especially with electromechanical and electromagnetic technology. Compared to pneumatic actuator s, the electrical drive allow a much finer control of position ... control of systems with actuator failures , in IEEE Transactions on Automatic Control, vol. 47, no. 3 ... control LQG Control for a Highly Redundant Actuator , in Preprint of the IFAC Conference for Advanced ... Of Strategies For Control Of High Redundancy Actuators , ACTUATOR 2006, Germany. X. Du, R. Dixon, R.M. Goodall, and A.C. Zolotas Modelling And Control Of A Highly Redundant Actuator , CONTROL ... more details
MPVA can refer to Ministry of Patriots and Veterans Affairs South Korea Paralyzed Veterans of America in Michigan, Minnesota, or other locations Midwest Professional Volleyball Association Minnesota Professional Videographers Association Mornington Peninsula Vigneron s Association Maintain a Position Visual flight rules VFR and Advise Main Propellant Pneumatic actuator Valve Actuator A type of thin film transistor liquid crystal display disambig ... more details
The Getrag 247 transmission is an AMT automated manual transmission . The gears are changed with a Hydraulic actuators hydraulic actuator system , controlled by an electronic control unit . automotive part stub Category Getrag transmissions 247 AMT ... more details
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