Industrial process control experimental device and method capable of obtaining non-minimum phase characteristics

Abstract

Industrial process control experimental devices and methods capable of obtaining non-minimum phase characteristics belong to the experimental and teaching fields of industrial automation and process control technology. It is composed of a controlled object unit and a computer control unit; the controlled object unit consists of a first motor speed regulating device, a first blower, a second motor speed regulating device, a second blower, a first electric actuator, a first adjusting baffle, It consists of a second electric actuator, a second adjusting baffle, an air heater, a tee, an air temperature meter and an air flow meter; the computer control unit is a PLC / DCS control system; based on the frequency of the second motor speed control device or the second Adjust the baffle opening as the control variable, and use the normal temperature airflow flow as the controlled variable to design a single-loop controller; use the frequency of the first motor speed control device or the first adjusting baffle opening as the control variable, and use the medium-temperature airflow temperature as the controlled variable. The controlled variable is used to form a non-minimum phase controlled object; a controller suitable for the non-minimum phase controlled object is designed.

Description

Technical field [0001] The invention belongs to the research, experiment and teaching fields 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 control difficulty. In a mathematical sense, this type of system is characterized by zero dynamic instability, or inverse instability. When restricting this type of system to a linear system, it 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 a unit step signal is input to the control input of the controlled object, the controlled output of the controlled object The variable will change in the direction opposite to the steady-state response ...

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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