Electricity: motive power systems – Positional servo systems
Patent
1992-01-21
1993-11-23
Ip, Paul
Electricity: motive power systems
Positional servo systems
318616, 318618, 318430, 303100, 3031152, H02P 700, B60T 834
Patent
active
052647676
ABSTRACT:
An improved method of controlling an electro-hydraulic control system by developing a motor control command in relation to the desired force to be exerted by an electric motor on a mechanical element whose displacement determines the hydraulic pressure. The control command is comprised of two magnitude signals. The first magnitude signal must be sufficient to exert enough force to overcome a static friction characteristic of the mechanical element, and the second magnitude signal is selected to achieve a desired average current or voltage over that control period. The time constant for the control command is less than the mechanical time constant of the system, but greater than the the electrical time constant of the system. The control command may be implemented by using either current or voltage control.
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Chin Yuen-Kwok
Headley Philip M.
Kulkarni Prakash K.
Lin William C.
Sidlosky David M.
Delco Electronics Corp.
General Motors Corporation
Ip Paul
Navarre Mark A.
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