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Multivariable nonlinear process controller

  • US 5,570,282 A
  • Filed: 11/01/1994
  • Issued: 10/29/1996
  • Est. Priority Date: 11/01/1994
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling a process having process inputs and process outputs comprising a controlled variable, the process responsive to a manipulated variable to vary the process in relation to the controlled variable, said apparatus comprising:

  • a) measuring means for measuring values of one of said process outputs generating a process output signal representative thereof;

    b) setpoint means for receiving a setpoint which represents a target value of the controlled variable;

    c) control means, coupled to said measuring means and the process, for generating a selected value of the manipulated variable as a function of the setpoint and the process output signal, said control means utilizing a nonlinear function generator previously trained to compute the selected value of the manipulated variable in accordance with an optimum prediction time, the optimum prediction time representing the effective response time of the process to a change in the setpoint, and the selected value of the manipulated variable representing a change in the process needed to move the controlled variable towards the setpoint as advanced by the optimum prediction time; and

    d) actuator means, coupled to said control means and said process, for applying the selected value of the manipulated variable to the process.

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