Power transmission

Details Power transmission Power transmission

1984-12-20

1986-09-16

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Multiple mode systems

318611, 318621, 318561, 318626, G05B 501

Patent

active

046124896

ABSTRACT:
An electrohydraulic servo control system responsive to a load acceleration or velocity command input signal wherein the input command signal is integrated and compared with position feedback from the valve actuator and load to obtain an error signal which controls the actuator. The velocity command input may be multiplied by an exponential factor to compensate for system following error. Another modification contemplates resetting of command signals to compensate for following error and to eliminate dead time upon change of direction of the load by the operator.

REFERENCES:
patent: 2954514 (1960-09-01), Hemstreet
patent: 3721882 (1973-03-01), Helms

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