Ball screw positioning error compensation system based on precision correction of ultrasonic sensor

Abstract

The invention discloses a ball screw positioning error compensation system based on precision correction of an ultrasonic sensor. The method comprises the following steps that 1, the ultrasonic sensor is fixed to a sliding table of a ball screw; 2, installing and zeroing a laser interferometer; 3, starting a servo motor, and recording displacement signals of the ultrasonic sensor and the laser interferometer in real time; 4, performing frequency analysis on the signals recorded by the ultrasonic sensor, reducing low-frequency noise of the ultrasonic sensor, and improving the resolution of the ultrasonic sensor; 5, performing data fitting in the BP neural network to improve the precision of the sensor, and verifying the corrected signal; and 6, compensating the positioning error of the ball screw by using the displacement signal recorded by the sensor.

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