Double-linear-motor contour compensation device and method based on fuzzy RBF network sliding mode

Abstract

The invention provides a double-linear-motor contour compensation device and method based on a fuzzy RBF network integral sliding mode with respect to a double-linear-motor numerical control feeding system with the axial direction being in mutual vertical movement. A real-time contour error is used as the input of a controller, the powerful self-learning ability of the controller enables the contour error to tend to zero within limited time, and thus contour machining precision is improved. The double-linear-motor contour compensation device comprises a commutating and voltage-stabilizing unit, an IPM inverter, a DSP, a Hall sensor, a grating ruler, a current detection unit, a position and speed detection unit, an optical coupling isolation circuit, a driving protection circuit and a fault detection and protection circuit. The DSP comprises a QEP circuit of an event manager EVA, an ADC module, a PWM unit, a Flash storage module, a program storage, a timer and a PDPINT pin. A PI controller of a position signal setter, a linear motor position loop, a speed loop and an electric current loop, a contour error calculator, a fuzzy RBF network integral sliding mode contour compensator and a driver device are further arranged inside the DSP. The double-linear-motor contour compensation device is good in robustness, suitable for contour machining tasks of any track and capable of achieving high-precision contour control.

Description

technical field [0001] The invention belongs to the field of automation control and numerical control, in particular to a dual linear motor contour compensation device and control method based on fuzzy RBF network integral sliding mode. Background technique [0002] With the continuous development of science and technology, under the strong support of the automatic control system, the servo system has developed rapidly and has been applied in almost every field. This also makes the precision requirements of production equipment higher and higher as the industrialization process is accelerating. It can be said that it measures the comprehensive national strength and technological level of a country to a large extent. CNC machine tools have therefore become the processing machine of the contemporary machinery manufacturing industry. It can provide the required equipment to various departments of the country. It is the commanding height for industrial production to compete for...

AI Technical Summary

Problems solved by technology

[0003] The direct drive method eliminates all intermediate transmission links, although it brings advantages such as fast response and high efficiency, it also increases the difficulty of electrical control

In order to improve the contour accuracy of the dual linear motor feed control system, many methods focus on the design of the controller for the single axis of the linear motor, and reduce the contour error by reducing the following error, but this alone cannot solve the dynamics existing between the two axes. Mismatch and complex error models of arbitrary trajectory tracking contours

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