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 ?
It also could include a sleep mode when the actuator is idle, which extends battery by reducing energy consumption and battery drain.
At launch, the actuator size 2 for diaphragm valves with nominal sizes of between DN 40 and DN 65 and for globe valves with nominal sizes of between DN 32 and DN 100 will be available.
Simple position sensors can now be added to these actuators, which can later be combined with flow-control technologies yielding all the same control benefits of an electric actuator.
This market research report emphasizes on the growing popularity of electric actuators.
It describes connection between volume of bellow actuator VBA and its current height.
H-bridge TECHLINE introduced actuators with iFLEX technology.
The commercialized Nafion[R] (DuPont[TM]) film with a thickness of 180 [micro]m was used as an ionic polymer film for the fabrication of an IPMC actuator.
Then jam another flat-blade screwdriver between the latch and the actuator and pry.
Simworx became aware of Festo's fluidic muscles; these are a form of pneumatic actuator resulting from Festo's bionic concepts research programme.
Removing the main-landing-gear retract actuators should be an easy process for an experienced Prowler airframer: remove two bolts and two hydraulic lines, and the actuator is in your hands, ready to go.
One end of each actuator is connected to the underside of the car and the other end of each pair of actuators is joined by a rotating pin through the bearing assembly.