Method and apparatus for controlling a magneto-rheological...

Details Method and apparatus for controlling a magneto-rheological... Method and apparatus for controlling a magneto-rheological...

2006-02-10

2009-08-04

Tran, Khoi (Department: 3664)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C701S042000, C701S046000, C701S047000, C180S415000, C180S417000, C180S442000, C180S443000, C180S444000

Reexamination Certificate

active

07571040

ABSTRACT:
A method of controlling a magneto-rheological power steering coupling is provided. The method is to be employed by a controller and is initiated upon engine start-up. The method includes initializing calibration parameters and reading a plurality of input values. Subsequently, a hand wheel angle rate value is calculated from one of said plurality of input values. A pump speed command value is calculated as a function of at least the hand wheel angle rate value. A pump speed error value is then calculated, and a proportional-integral-derivative calculation is performed acting on the pump speed error value to determine a pulse width modulation duty cycle value. The duty cycle value is then output to a power driver to provide a control signal to the magneto-rheological power steering coupling. Also provided is control system and apparatus operable to perform the functions described hereinabove.

REFERENCES:
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patent: 6920753 (2005-07-01), Namuduri
patent: 2003/0146041 (2003-08-01), Kanda

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