Patent ID: 6522991
Filing Date: 2003-02-18
Classification: F05B,F23N,F23R

Abstract:
A method of minimizing the magnitude of a parameter of a dynamic process, the magnitude of said parameter being (a) responsive to a process adjusting input variable applied to said process and (b) varying essentially sinusoidally with time, said method comprising:(A) measuring said parameter and providing a parameter signal indicative thereof; (B) applying said parameter signal to an observer to provide signals indicative of the in-phase and quadrature components and magnitude of said parameter signal; (C) providing, in response to said in-phase, quadrature and magnitude signals, a phase signal indicative of the phase of said process adjusting input variable required to reduce the magnitude of said parameter; (D) providing a control signal as a function of said inphase and quadrature signals and said phase signal to control said process adjusting input variable; and (E) controlling said process adjusting input variable as a function of said control signal.