A positioning system for moving parts

Abstract

A motion member positioning system comprises a motion member driven by a driving motor and a positioning motor. The positioning motor comprises positive and negative voltage input ends and a negative voltage output end. A fixed-value resistor is arranged between the positive and negative voltage input ends. A variable-value resistor is arranged between the positive voltage input end and negative voltage output end and is associated with the rotation angle of an input shaft. A control unit compares the preset voltage with the variable voltage on both ends of the variable-value resistor and outputs driving voltage to the driving motor. The driving voltage drives the driving motor to turn. The negative feedback automatic control of the entire system has good accuracy.

Description

Technical field [0001] The invention relates to a positioning system for a moving part. Background technique [0002] In modern mechanical equipment and control systems, it is often necessary to accurately control the stroke and position of a moving part, such as: the opening position control of a valve, the reciprocating linear motion control of a certain actuator, etc. The movement process of the moving parts is often driven by corresponding drive systems, such as motor drive, hydraulic drive system, etc. On the one hand, during the operation of the moving parts, due to their own rotational inertia, the problem of exceeding the set position is easy to occur, resulting in control accuracy On the other hand, when the moving part moves to a certain position, if there is no feedback, the precise positioning of the moving position cannot be achieved; in addition, more moving parts also need to be continuously and accurately controlled in their stroke. [0003] Some moving parts often...

AI Technical Summary

Problems solved by technology

[0005] 1) The contact between the moving parts and the limit switch and the action of the force cause the limit switch to trigger the button or the pressing piece to deform, and the long-term interaction will easily cause the contact to wear out and the limit switch to press the piece Deformation, poor contact, etc.;

[0006] 2) Using the contact and limit switch, the control accuracy is easily affected by the moving speed and inertia of the moving part. For example, when the inertia of the moving part is large, the contact will still move a certain distance after touching the limit switch, and the position accuracy Difficult to guarantee

[0007] 3) This technology can only realize the limit function of the positions of the left and right limit switches, and the position between the limit switches cannot be precisely controlled, that is, continuous position control cannot be realized

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