| 摘要 |
1,145,817. Servo systems. INTERNATIONAL BUSINESS MACHINES CORP. 27 Dec., 1967 [5 Jan., 1967], No. 58604/67. Heading G4H. The system described in Specification 1,073,875 is modified in that the frequency of the oscillator supplying the continuously cycling counter is varied in dependence on the error signal. The error signal is proportional to the square root of the position error and the overall gain of the system is reduced when large errors exist. The frequency of the oscillator may be varied by an external control signal in conjunction with the error signal and a velocity feedback signal may be combined with the error signal. |
