Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means
Patent
1990-01-09
1992-01-21
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Electrical input and feedback signal means
91521, 91529, 13759615, 13759616, 137627, F15B 909
Patent
active
050819038
ABSTRACT:
A multiplexed hydraulic control system having a plurality of hydraulic channels for individually controlling the positions of a plurality of actuators in the respective channels in accordance with a corresponding plurality of electrical control signals. The system includes a relatively small multiplexing valve or valve array which has a common input and a plurality of individually selected outputs. The multiplexing valve has a control input which is responsive to a source of binary selector signals, such selector signals being used to directly address any particular channel connected to the multiplexer. The system also includes means for modulating a hydraulic signal in accordance with selected ones of the plurality of electrical control signals, and applying the modulated hydraulic signal to the multiplexer common input. Control means then coordinates the addressing of the multiplexer with the modulating of the hydraulic signal to assure that hydraulic signals of the appropriate magnitude are coupled to each addressed channel, thereby to control all of the channels in accordance with the control signals for each channel.
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Leeson, deceased James L.
Sievert Dale W.
Wardle John W.
Kapsalas George
Look Edward K.
Woodward Governor Company
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