IMPACT DROP COMPENSATING CIRCUIT OF INPUT SIGNAL IN CONTROL SYSTEM

摘要

PURPOSE:To compensate a safety operation against to the rush changing of an input signal, by means of allowing the output of an intgrated circuit to be always follow-uped by inputting an input signal to the integrated circuit. CONSTITUTION:For example, in a case of a speed control of a rotary hot saw, the speed of a mill stand and the line speed from the measuring roll are added to the control amplifyer via a changing over device 7. The output of an integrator 16 is added to the same input terminal, and the integrator 16 is always follow-uped to the input signal, because the deviation is added to the integrator 16. The output and the input signal of the integrator are also added to comparators 18, 19 at the same time, and they make a relay 24 or 25 to ON by means of allowing a transistor 22 or 23 to be conducted in a case when the input signal is rushly changed. The output of the integrator is kept, because that this relay opens the contact 14 or 15. Accordingly, the rotary hot saw controlled in speed by the output of the integrator never generates the accident.