Industrial process control experimental device capable of acquiring non-minimum phase characteristic and method

Abstract

The invention relates to an industrial process control experimental device capable of acquiring a non-minimum phase characteristic and a method, and belongs to the experiment and teaching field of industrial automation and process control technologies. The industrial process control experimental device is composed of a controlled object unit and a computer control unit, and is characterized in that the controlled object unit is composed of a first motor speed regulation device, a first air blower, a second motor speed regulation device, a second air blower, a first electric actuating mechanism, a first regulating baffle, a second electric actuating mechanism, a second regulating baffle, an air heater, a tee joint, an air thermometer and an air flow meter; and the computer control unit is a PLC / DCS. The method comprises the steps of designing a single-circuit controller by taking the frequency of the second motor speed regulation device or the opening degree of the second regulating baffle as a controlling variable and taking the normal-temperature air flow as a controlled variable; constituting a non-minimum phase controlled object by taking the frequency of the first motor speed regulation device or the opening degree of the first regulating baffle as a controlling variable and taking a medium-temperature air flow temperature as a controlled variable, and designing a controller which is suitable for the non-minimum phase controlled object.

Description

technical field [0001] The invention belongs to the field of research, experiment and teaching of industrial automation and process control technology, and specifically relates to an industrial process control experimental device and method capable of obtaining non-minimum phase characteristics. Background technique [0002] The non-minimum phase system is a controlled object with considerable difficulty in control. In a mathematical sense, such systems are characterized by zero dynamic instability, or inverse instability, which when restricted to linear systems, is characterized by an unstable open-loop zero point. In the physical sense, the controlled object with non-minimum phase often exhibits a special and interesting reverse characteristic, that is, when the control input of the controlled object inputs a unit step signal, the controlled object at its output The variable will change in the direction opposite to the steady-state response direction at the initial stage,...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that various existing automated experimental devices and process control experimental devices lack physical controlled objects with non-minimum phase characteristics, the present invention provides an industrial process control experimental device and method capable of obtaining non-minimum phase characteristics

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