Vibration suppression controller based on position feedback signals of feeding system

Abstract

The invention discloses a vibration suppression controller based on position feedback signals of a feeding system. A vibration control suppressor is arranged between a numerical control system and a servo system. Input signals of the controller are + / -10V analog quantity signals or digital quantity signals which represent set rate instructions and are generated by the numerical control system and the position signals, measured by a position measuring system, of a working table, and output signals of the controller are + / -10V analog quantity signals or digital quantity signals which represent correction rate instructions. According to the vibration suppression controller, the actual position signals of the working table are measured by the position measuring system, similar interpolation instruction signals are acquired through a similar interpolation instruction signal calculator, vibration suppression signals are acquired through processing of a vibration suppression signal generator and fed back to a regulating loop, and then the goal of suppressing vibration is achieved. In addition, the similar interpolation instruction signals are acquired through the similar interpolation instruction signal calculator, rate feed-forward signals are acquired through a rate feed-forward controller and fed back to the regulating loop, and then the goal of reducing steady state errors is achieved.

Description

technical field [0001] The invention relates to the field of mechanical control, in particular to a vibration suppression controller based on a feed system position feedback signal. Background technique [0002] In today's society, precision and ultra-precision machining technology has become an important part of modern machinery manufacturing. CNC machine tool is an important tool in mechanical manufacturing, and its accuracy index is an important factor affecting the machining accuracy of workpieces. As the main component of the CNC machine tool, the feed system's following performance and anti-interference ability have seriously affected the machining accuracy of the CNC machine tool. [0003] The existing machine tool feed system control applications are mainly cascade control: current loop PI control, speed loop PI control and position loop P control. The speed loop realizes the speed feedback through the angle encoder on the motor side, and the position loop realizes...

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Problems solved by technology

However, due to the closed nature of the CNC system and the servo system, the vibration suppression method adopted in this patent can only be considered in the design stage of the servo system, and cannot be considered in the use stage, which limits its scope of application.

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