Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Adaptive controller for electric power steering










Image Number 4 for United States Patent #4509611.

A torque transducer senses the operator exerted steering torque and provides an output signal which varies in magnitude from a low value representative of a large operator exerted steering torque in one direction through a mean value representative of no operator exerted steering torque to an upper limit value representative of a large operator exerted steering torque in the opposite direction. The controller develops a zero torque reference which has an initial value substantially corresponding to the mean value of the torque transducer output signal, and steering torque assist is developed in relation to the difference between the zero torque reference and the transducer output signal. In operation, the zero torque reference is shifted according to a predetermined time response characteristic in a direction to reduce the difference between it and the transducer output signal. Over a period of time, the shifting of the zero torque difference due to operator exerted steering torque tends to cancel out and the remaining shifting adaptively compensates the zero torque reference for drift and other like sources of error affecting the magnitude of the transducer output signal.








 
 
  Recently Added Patents
Method and system for fail-safe call survival
Method and apparatus for encoding and decoding video based on first sub-pixel unit and second sub-pixel unit
Method of enhancing corrosion resistance of hollow vessels
Automatic fixup of network configuration on system image move
Multiplanar image displays and media formatted to provide 3D imagery without 3D glasses
Chip on chip semiconductor device including an underfill layer having a resin containing an amine-based curing agent
Method of improving sensitivity and interference rejection in wireless receivers
  Randomly Featured Patents
Anti-backoff lipstick container
Polishing machine with a brake device
Wafer level chip scale package and method of manufacturing the same
Method of removing sedimentated solids from a container and an apparatus therefor
Method and apparatus for monitoring audio listening
Uniform illumination device for the dial of a display device
Cleaning head for floor cleaning device
Clothes dryer
Circuit for preventing destruction of semiconductor laser element, and optical disc device provided with the circuit
Method of producing a dental product