Open-loop stepping servo controller, servo control system and servo control method

Abstract

The invention belongs to the technical field of servo control, and particularly relates to an open-loop stepping servo controller, a servo control system and a servo control method. The servo controller comprises an input switch conversion module, a control signal conversion module, a microprocessor and a stepping driving module. The input switch conversion module is connected with the microprocessor and is used for collecting opening and closing position signals of the electric control valve terminal; the control signal conversion module is connected with the microprocessor and used for converting the control analog signal of the electric control valve into a control digital signal; the microprocessor is respectively connected with the input switch conversion module, the control signal conversion module and the stepping driving module and is used for measuring and calculating a real-time valve position analog signal of the electric control regulating valve and generating a stepping motor control signal; and the stepping driving module is connected with the microprocessor and is used for carrying out data processing on the control signal generated by the microprocessor and generating a stepping motor driving signal. According to the invention, accurate positioning, rapid response and stable and reliable control can be realized.

Description

technical field [0001] The invention belongs to the technical field of servo control, and in particular relates to an open-loop stepping servo controller, a servo control system and a servo control method. Background technique [0002] The electric regulating valve has the advantages of high adjustment precision, good integration with advanced automatic control system, flexible control mode, and can realize digital control and distributed control; it has the advantages of simple structure and small size; it can replace the application of pneumatic regulator and get rid of the auxiliary compressed air system and Regulator zero system reduces energy consumption and maintenance costs. With the full application of the first generation of electric control valves in engineering, some deficiencies that need to be improved are also revealed: [0003] The first generation of electric control valve motor uses an AC synchronous gear motor, and the angular stroke of the control valve i...

AI Technical Summary

Problems solved by technology

[0004] Since the valve position sensor used is a contact angular stroke detection element, under the condition of stable process conditions, the contact valve position sensor operates in a narrow working area with high frequency forward and reverse strokes for a long time, causing the substrate in the working area to conduct electricity. The layer is worn, indented or even broken at the contact with the brush

[0005] The deviation of the coaxiality between the valve position sensor and the cam output shaft becomes larger as the running time increases, which accelerates the damage speed of the valve position sensor and threatens the safe operation of the process system

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