Patent ID: 6128586
Filing Date: 2000-10-03
Classification: G05B

Abstract:
A method for controlling a self-regulating, delayed process of a control device, comprising the steps of:a. turning on the control device;b. after step a, detecting a first setpoint step change;c. after step b, setting a manipulated variable from an initial value to a first constant value corresponding to one of a minimum value of the manipulated variable and a maximum value of the manipulated variable, to reduce a system deviation of the control device operating in a non-linear mode;d. determining a first model of the self-regulating, delayed process after the system deviation is reduced by 10% to 70%;e. determining a first time for resetting the manipulated variable to the initial value as a function of the first model, the first time being determined so that a controlled variable is within a predetermined range of a setpoint value;f. resetting the manipulated variable to the initial value at the first time;g. detecting a rate of change of the controlled variable after resetting the manipulated variable;h. determining a second model of the self-regulating, delayed process only if the rate of change of the controlled variable is below a predefined limit, the second model being more precise than the first model;i. setting parameters of a linear controller as a function of the second model; andj. after step i, controlling the self-regulating, delayed process in a linear mode via the linear controller.