| 释义 |
servo control
[f. servo n.]
1.
†a. Aeronaut. An aircraft control using a servo tab (see servo n. 2). Obs.
b. gen. = servo-mechanism a.
1928Rep. & Mem. Advisory Comm. Aeronaut. No. 1187.4 There is no spring force on the servo control. 1934Jrnl. Aeronaut. Sci. I. 155/1 The device now known as the servo control flap is a development of the ‘Flettner Rudder’ which was invented by the designer of the rotor ships. 1947Jrnl. Inst. Electr. Engineers XCIV. iia. 184/2 No output is produced in the bearing channel, and the feed to the corresponding servo control is consequently zero. 1951Instruments XXIV. 650/1 Servocontrols for the steel industry require..relatively high power level. 1977Proc. R. Soc. Med. LXX. 208/2 As with all tools, the servo-control incubator is only as good as the persons who use it.
2. The use of a servo-mechanism to assist with the control of a system; the action or practice of controlling a system by means of a servo-mechanism.
1929Rep. & Mem. Aeronaut. Res. Comm. No. 1262. 1 If no limit be set to the force which a pilot can exert then the maximum rolling moment possible with servo control is always less than that without it. 1953P. A. Merton in G. E. W. Wolstenholme Spinal Cord (Ciba Foundation Symp.) 247 (heading) Speculations on the servo-control of movement. 1977Proc. R. Soc. Med. LXX. 207/1 The principle of servo-control is that the instrument senses the baby's temperature and adjusts the thermal environment automatically.
Hence ˈservo-control v. trans., ˈservo-controlled ppl. a.
1935Rep. & Mem. Aeronaut. Res. Comm. No. 1652. 1 There have been several occurrences of flutter of servo-controlled rudders. 1948I. A. Greenwood in I. A. Greenwood et al. Electronic Instruments viii. 217 Practically all heavy antiaircraft artillery..is servo-controlled by the output of some type of computer. 1972Physics Bull. Apr. 232/2 The gratings are ruled in a very uniform layer of aluminium deposited on to an optically flat substrate..using a large precision ruling engine servocontrolled by laser interferometers. 1977Proc. R. Soc. Med. LXX. 207/2 The disadvantage of a servo-controlled incubator is that the temperature of the baby as a clinical guide to serious conditions..is lost. |