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Actuating Mechanism |
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Actuating Mechanism
(also servomotor), a device designed to move a control member in automatic-control or remote-control systems and to be used as an auxiliary drive for units in servomechanisms and vehicular steering gear. A change in the position of the control member produces a change in the flow of energy or material to an object and thereby affects the operation of machines, mechanisms, and technological processes by eliminating the deviations of the controlled variable from its prescribed value. An actuating mechanism not only changes the state of the object being controlled but also moves the control member according to a specified control principle, with the minimum possible deviations. In most cases it is operated by external power sources, since direct control by means of an actuating mechanism consisting of primary control units such as relays and transducers is impossible because of their low power, which is insufficient to act on a control member. An actuating mechanism usually consists of a motor, a transmission, and control units, as well as feedback, signaling, interlocking, and shutoff units. Actuating mechanisms to control the flow of fluids or gases consist of a valve, shutter, or gate, which is moved by hydraulic, pneumatic, or electrical drive. Diaphragm and piston drives are used in pneumatic automation systems. Electromechanical actuating mechanisms are extensively used in industrial automation; they are usually driven by an induction motor, but in some cases they are driven by an electromagnet (solenoid), the use of which is limited because of its abrupt (jerky) action on the member being controlled. Hydraulic mechanisms operate at pressures up to 3 mega-newtons per sq m (MN/m2), or 30 kilograms-force per sq cm (kgf/cm2); pneumatic mechanisms, at pressures up to 0.6 MN/m2(6 kgf/cm2). Most electric mechanisms have electric motors with powers ranging from 10 watts to 1 kilowatt or more. REFERENCESOsnovy avtomaticheskogo regulirovaniia, vol. 2, part 1. Edited by V. V. Solodovnikov. Moscow, 1959.Mironov, K. A., and L. I. Shipetin. Avtomaticheskie reguliatory: Spravochnye materialy. Moscow, 1961. Avtomaticheskie pribory, reguliatory i upravliaiushchie mashiny, 2nd ed. Moscow, 1968. K. A. ROZANOV Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | Preservation of actuating mechanism Suitable upkeep assists to make sure that the electrical motors and connected gears work adequately, if something have been to happen there is a mechanical override to permit the slide-out to be retracted manually. The actuating mechanism (power adapter unit or battery-run) uses ball-bearing based gear motors -- currently the most reliable and most silent on the market. Ireland) predict in their presentation of 20 papers from the April 2006 eponymous symposium at the spring meeting of the Materials Research Society, the technology of smart nanotextiles "will let us make supercomputers that fit on the head of a fiber; impart sensing and actuating mechanisms in micron- or nanostructures; allow wireless communication between devices, our body, and environments; and make fashionable, intelligent clothing with built-in electronic and photonic functions. |
Actuating Mechanism |
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