Patent ID: 7304546
Filing Date: 2007-12-04
Classification: G05B

Abstract:
1. A feedback control loop having a filter response and a cut-off frequency, comprising: a system under control for generating an output signal being an output signal of said feedback control loop in response to a control difference signal; a loop filter for generating a feedback signal in response to said output signal; a subtraction device for generating said control difference signal by subtracting said feedback signal from an input signal fed to said feedback control loop; said loop filter being adjustable by means of a filter coefficient set having in each case at least one filter coefficient, each depending on a setting parameter, so that a filter coefficient set for adjusting said filter response of said feedback control loop can be selected and said cut-off frequency of said feedback control loop being adjustable externally in a manner dependent on said setting parameter; and a memory configured to store coefficient equations for each of said adjustable filter response with an associated coefficient equation being stored in said memory for each of said filter response in each case for each of said filter coefficients of said loop filter and each of said stored coefficient equations specifying the dependence of one of said filter coefficients of said loop filter on said external setting parameter and said filter coefficient equations for said filter response of said feedback control loop being read from said memory in a manner dependent on an external selection signal for the selection of said filter response.