Automatic control system with integrator offset

Details Automatic control system with integrator offset Automatic control system with integrator offset

1976-06-29

1978-03-28

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

'reset' systems

318621, 318609, G05B 1136

Patent

active

040817334

ABSTRACT:
An automatic control system wherein repetitive pulses, the frequency of which is responsive to a remote condition, such as prime mover RPM, are converted to a DC voltage level. The voltage level is compared to a reference by a difference amplifier to produce an error signal. Further signals are produced from the error signal, including an integral thereof, which signals are ultimately used to control the remote condition. The integrator is provided with an offset circuit to prevent saturation thereof during override of the normal control signal by an external limit signal as, for example, excessive engine temperature or smoke output.

REFERENCES:
patent: 3588658 (1971-06-01), Van Der Sluys et al.
patent: 3778696 (1973-12-01), Walters et al.
patent: 3819999 (1974-06-01), Platt

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