초록 ▼

An adaptive process control system comprises a controller of an I-P type generating a manipulating variable signal with a feed forward circuit responsive to the set-point signal r(t), an integrator responsive to a difference between a process variable signal y(t) and set-point signal r(t), and a fee

An adaptive process control system comprises a controller of an I-P type generating a manipulating variable signal with a feed forward circuit responsive to the set-point signal r(t), an integrator responsive to a difference between a process variable signal y(t) and set-point signal r(t), and a feedback circuit responsive to the process variable signal y(t). An identification signal generator superposes a persistantly exciting identification signal h(t) to the control system. A frequency characteristic identifying circuit receives a discrete controlled data u(k) and y(k), estimates the parameters of the ARMA model by the least square method to identify the pulse transfer function, and obtains the transfer function in the continuous system as the frequency characteristics of gain and phase. A controller parameter calculating circuit calculates the controller parameters of the controller, such as integration gain K, proportional gain fo, and feed forward gain ff, using the frequency characteristics of gain and phase, and the overshoot, gain and phase margins, and attenuation ratio. The controller parameters are supplied via a switch to the controller.

대표청구항 ▼

An adaptive process control system comprising: set point means for generating a set-point signal which represents a target value of a process variable signal of a process to be controlled; controller means for generating a manipulating signal which controls the process variable signal in accordance

An adaptive process control system comprising: set point means for generating a set-point signal which represents a target value of a process variable signal of a process to be controlled; controller means for generating a manipulating signal which controls the process variable signal in accordance with the set-point signal, the process variable signal, and controller parameters; tuning means for superposing a persistently exciting identification signal on at least one of the set-point signal and the manipulating signal; frequency characteristic identifying means for estimating an autoregressive moving average model of the process from sampling data of the process variable signal and sampling data of the manipulating signal by using a least square method, during a period in which said tuning means outputs the identification signal, identifying a pulse transfer function of the process, and obtaining a frequency characteristic of gain and phase of the process based on the pulse transfer function; and controller parameter calculating means for adjusting the controller parameters of the controller means so that the frequency characteristics of gain and phase satisfy predetermined gain and phase margins. An adaptive process control system comprising: first calculating means for receiving a characteristic coefficient of a reference model exhibiting a desired waveform of a response of the adaptive process control system, and calculating gain and phase margins of the reference model; and second calculating means for receiving the calculated gain and phase margins from said first calculating means, a transfer function of the adaptive process control system, and a signal representing a compensation mode of the adaptive process control system, and for removing the difference so that the gain and phase margins of the adaptive process control system coincide with those calculated by said first calculating means.