actuator


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actuator

[′ak·chə‚wād·ər]
(control systems)
A mechanism to activate process control equipment by use of pneumatic, hydraulic, or electronic signals; for example, a valve actuator for opening or closing a valve to control the rate of fluid flow.
(engineering acoustics)
An auxiliary external electrode used to apply a known electrostatic force to the diaphragm of a microphone for calibration purposes. Also known as electrostatic actuator.
(mechanical engineering)
A device that produces mechanical force by means of pressurized fluid.
(ordnance)
Part of the receiver mechanism in certain types of automatic weapons.

actuator

actuatorclick for a larger image
A mechanical, electrical, or hydraulic device, or their combination, used to effect some predetermined linear, rotary, or oscillating movement. An actuator essentially converts hydraulic or air pressure into mechanical force. Basically, there are two types of actuators: single-acting and double-acting. In the single-acting actuator, the piston moves in a single direction as a result of system pressure. In a double-acting system, the actuator's piston moves in either direction. The fluid enters from one side of the piston and is drained out of the other. The double-acting actuator may be balanced or unbalanced. In the former case, movement in both directions is equal, whereas in the latter case, the movement to one side is greater than the other.

actuator

A mechanism that causes a device to be turned on or off, adjusted or moved. The motor and mechanism that moves the head assembly on a disk drive or an arm of a robot is called an actuator. See access arm.
References in periodicals archive ?
The emphasis was made on development of accurate easy-to-calculate mathematical model of two-way bellow actuator. Such model together with reliable models of electro-pneumatic throttle spool-type valves allow to receive more accurate pneumatic drive model.
During ops check of aileron trim system, trim tab actuator would not stop running when trim reached full left-roll position.
The design of the fishbone shaped electrostatic actuator is shown in Figure 3.
Length of the actuator in all models is 30 mm and radius is about 3 mm.
The resonance frequency of piezoelectric actuator containing one single pusher obtained by simulation is about 222 kHz.
After forming the electrodes on both surfaces of the Nafion[R] film via electroless plating, the IPMC actuator is fixed to the desired shape using a suitable jig or mold.
The methodology HVAC Damper Actuator market is done with the help of a compilation of the market information that is explained through known parameters of Porter's Five Force Model.
To learn more about the Hanbay electric valve actuators, technical support or help finding valves for upcoming projects and applications contact our manufacturing facilities at 1-800-315-4461, or visit the website at www.hanbayinc.com.
"HASEL actuators synergize the strengths of soft fluidic and soft electrostatic actuators, and thus combine versatility and performance like no other artificial muscle before.
Low-level power switching is standard with the J1939 protocol, allowing operators to command the actuator to extend, retract, or stop smoothly using low-level electronic signals rather than a higher-energy electrical current.
The self-locking actuator also offers a high level of reproducibility for positioning and is therefore particularly suitable for use in precise control applications.
This actuator, specially designed to fit into the round window niche, differs in size and working principle from other actuators [10] and was tested in human temporal bones to demonstrate feasibility and to determine the influence of controlled axial static force on actuator performance and sound transmission.