Method and device for improving operation accuracy of electric cylinder and electric cylinder

Abstract

The invention provides a method for improving operation accuracy of an electric cylinder. The method comprises the following steps: firstly obtaining a measured value of a tooth space in the electric cylinder through measurement and obtaining the tooth space deviation of the electric cylinder based on the measured value and set value of the tooth space; and then implementing tooth space deviation compensation according to the tooth space deviation when the operation direction of the electric cylinder changes in the operation process of the electric cylinder so as to improve the operation accuracy of the electric cylinder. The invention also provides a device for improving the operation accuracy of the electric cylinder. The device comprises a tooth space measurement module used for measuring the tooth space deviation of the electric cylinder and a control module used for compensating the tooth space deviation of the electric cylinder according to the operation direction of the electric cylinder when the electric cylinder operates. Besides, the invention also provides the electric cylinder applying the above method / device. The method, the device and the electric cylinder have the following beneficial effects: the impact of the tooth space deviation of a transmission mechanism in the electric cylinder on the operation accuracy of the electric cylinder can be effectively reduced and even eliminated; and the operation accuracy of the electric cylinder is not affected by the shell processing accuracy and slider operation speed of the electric cylinder.

Description

technical field [0001] The present invention relates to the technical field of automatic control, in particular to a method and device for improving the running precision of an electric cylinder and an electric cylinder applying the method / device. Background technique [0002] Modern industrial equipment generally has the characteristics of high automation and high operating precision, which requires transmission equipment to have high stability and positioning accuracy. As a linear drive device, the electric cylinder is widely used in various transmission equipment because it can meet high precision requirements. [0003] see figure 1 At present, the commonly used electric cylinder is composed of motor 1, motor driver, encoder (motor driver and encoder are not shown in the figure), coupling 2 and executive components. The motor 1 is connected with a dedicated motor driver to control the working parameters such as the speed and torque of the motor 1; the encoder is used as...

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Problems solved by technology

However, the separate grating ruler used in the above-mentioned electric cylinder is set in the entire stroke of the electric cylinder, which requires the shell of the electric cylinder to have very high machining precision and installation precision; when the stroke of the electric cylinder is long, the above-mentioned accuracy requirements are very high. It is difficult to guarantee that if the grating ruler deviates due to installation errors and other problems, it will seriously affect the positioning accuracy of the electric cylinder, and even make the grating reading head unable to read the grating data correctly, and the electric cylinder will not be able to operate and position accurately

In addition, the reading accuracy of the grating ruler reading head will also be affected by the movement speed of the slider. If the slider speed is too high, the grating reading head will not be able to correctly feed back the motion parameters of the slider, and it will also be unable to accurately position the electric cylinder.

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