Control system for hydrostatic transmission

Details Control system for hydrostatic transmission Control system for hydrostatic transmission

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 61/42 (2006.01) F16D 31/02 (2006.01) F16D 39/00 (2006.01) F16H 61/46 (2006.01) F16H 59/36 (2006.01) F16H 59/42 (2006.01)

Patent

CA 2381918

A control system controls a hydrostatic transmission having an engine driven variable displacement pump coupled to a fixed displacement motor. The pump has a swashplate which is controlled by a control signal generated by the control system. The control system includes a speed command signal generator, a motor speed sensor for generating a sensed motor speed signal; an engine speed sensor for generating an engine speed signal, and a control unit which generates the control signal as a function thereof. The control unit generates a desired motor speed signal as a function of the speed command signal and the engine speed signal, generates a feed-forward command signal as a function of the desired motor speed signal, generates a difference signal as a difference between the desired motor speed signal and the sensed motor speed signal; generates an integral signal by applying an integral function to the difference signal, generating a sum signal as a summation of the feed-forward command signal and the integral signal, and generating the control signal as a function of the sum signal.

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