Compensation apparatus for an electrohydraulic servovalve

Details Compensation apparatus for an electrohydraulic servovalve Compensation apparatus for an electrohydraulic servovalve

1981-12-07

1984-03-27

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With compensating features

318561, 318615, G05D 23275

Patent

active

044397160

ABSTRACT:
Electronic compensation apparatus for a drive system associated with a torque motor of an electrohydraulic servovalve. The apparatus includes means to define an open loop transfer function characteristic of the drive system, wherein the transfer function corresponds to a notch filter. Further included are means to provide the open loop characteristic with a closure rate of approximately no more than 6 db/octave with respect to a function 1/.beta.=1-G.sub.cl (s), where G.sub.cl (s) corresponds to a closed loop transfer function of the drive system. In particular, the notch filter may be realized in a drive system that includes a series resistive-capacitive circuit connected in parallel with the torque motor. The 6 db/octave closure rate is provided by a variation of the impedance of the series resistive-capacitive circuit.

REFERENCES:
patent: 3051883 (1962-08-01), Smith
patent: 4016469 (1977-04-01), Lanni et al.
patent: 4051423 (1977-09-01), Touchton et al.
patent: 4059790 (1977-11-01), Kennel
patent: 4096426 (1978-06-01), Tremaine et al.
patent: 4139811 (1979-02-01), Klinger

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