G - Physics – 01 – R
Patent
G - Physics
01
R
324/58.4
G01R 31/02 (2006.01) B66B 1/30 (2006.01) B66B 5/10 (2006.01) G05B 23/02 (2006.01)
Patent
CA 1092192
Title of the Invention Fault detecting system for a control system Abstract of the Disclosure In a speed feedback control system wherein a speed command signal and a speed feedback signal are compared and wherein the deviation between these signals is entered into a speed control unit, the speed signal is differentiated to apply a speed damping in order to suppress the oscillations of the control system. In this case, while the speed command and the actual speed make a great difference transiently, the speed command is approximate to the sum between the speed feedback signal and the damping signal even transiently. Therefore, the speed command signal is compared with the sum between the speed feedback signal and the damping signal, and fault of the speed control system is detected upon the fact that the deviation has exceeded a predetermined value.
289483
Inaba Hiromi
Kuroha Hiroaki
Kurosawa Toshiaki
Sakai Yoshio
Shima Seiya
Hitachi Ltd.
Kirby Eades Gale Baker
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