Control circuit for an electrically controlled servo device

Details Control circuit for an electrically controlled servo device Control circuit for an electrically controlled servo device

1990-09-25

1993-01-12

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318620, G05B 1904

Patent

active

051793300

ABSTRACT:
A control circuit includes a microprocessor, a table store and an amplifier stage to control a controlled device which has a non-linear or linear, but discontinuous response curve. To obtain a linear response curve of the controlled device the table store is loaded with a response curve map in operating the controlled device. Thereafter the data loaded in pairs in the table store are inversely read-out and used as a control signal for the controlled device. The table store thus allows to linearize the response curve of the controlled device. In addition the data may be modified. According to the invention any correcting means to obtain an ideal response of the controlled device is eliminated. The invention provides for an optimum performance, smallest possible expenditure of circuitry and shortest possible control time.

REFERENCES:
patent: 4386626 (1983-06-01), Hehl
patent: 4833593 (1989-05-01), Takeuchi et al.
patent: 4920748 (1990-05-01), Kordak et al.
patent: 4928487 (1990-05-01), Nikolaus
patent: 4970941 (1990-11-01), Reinhardt
DE-Z: Vrancken, Hans Peter, Elektronik fur die Hydraulik, In: VDI-Z, Bd. 128, 1986, Nr. 21-Nov. (1), pp. 859-864.
DE-Z: Scholz, D., Aachen, Ventilansteurung und-regelung mit digitaler Signalverarbeitung, In: d+p-olhydraulik und pneumatik 29, 1985, Nr. 1, pp. 21-24.

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