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
SIC semiconductor device and method for manufacturing the same
Method and apparatuses for solving weighted planar graphs
Image forming apparatus and method of translating virtual memory address into physical memory address
Plants and seeds of hybrid corn variety CH089600
Fan guide
Subcarrier cluster-based power control in wireless communications
Polarization preserving front projection screen microstructures
  Randomly Featured Patents
Apparatus for stretching and aligning film sheets
Adamantane-spirolactams
Synchronization of multiple real-time transport protocol sessions
System and method for identifying substrate side
Heated diesel fuel filter
Universal remote control system
Passive nutrient removal material mixes
Instep guard for safety shoes
Method and apparatus for converting binary information into a single-sideband 3-level correlative signal
Apparatus and method for fast code coverage analysis