Patent ID: 6679565
Filing Date: 2004-01-20
Classification: B60T,F16D,Y10S

Abstract:
A force generating apparatus for providing a force to a moving element upon receipt of an electrical force signal, comprising:a force applying element coupled to the moving element for applying the force to the moving element; an actuator coupled to the force applying element for actuation thereof in response to receiving the electrical force signal; a transducer coupled to said actuator for sensing a pressure applied to said force applying element and producing an actual pressure signal; and, a controller for receiving a desired force actuation signal and the actual pressure signal, determining a desired pressure as a function of the desired force actuation signal and responsively determining an operating region as a function of the desired pressure, said operating region being defined by predefined bracketed thresholds of desired pressure, for comparing the desired pressure with the actual pressure and responsively determining an error signal, comparing said error signal with a predetermined threshold and responsively determining a brake mode, and for selecting a set of gains based on said operating region and said brake mode, applying said set of gains to a linear control function, determining said electrical force signal as a function of said linear control function, and sending said electrical force signal to said actuator.