Motor-driven XY platform contour processing control device and method based on direction field

Abstract

The invention discloses a motor-driven XY platform contour processing control device and a motor-driven XY platform contour processing control method based on a direction field. The device comprises an alternating current voltage regulating unit, a voltage regulating circuit, a rectifying filter unit, an IPM (intelligent power module) inversion unit, a digital signal processor (DSP), a Hall sensor, a grating scale, a current sampling circuit, a position sampling circuit and an IPM isolation driver protective circuit, wherein an NUBRS (non-uniform rational b-spline) interpolator, a speed field controller, an IP (Internet Protocol) controller and an integrator. The motor-driven XY platform contour processing control device uses the speed field controller based on the direction field theory, so that the given track route is completely converted to be controlled by a track coded by the speed field and the conversion system. IP control based on speed front feed reduces the speed error is reduced by IP based on rate forward feed, and the uncertain factors such as system external disturbance, parameter change and the like can be reduced, so that strong Robust performance of the system is ensured, and the contour processing precision is improved.

Description

technical field [0001] The invention belongs to the field of numerical control machining technology and control, in particular to a machining accuracy control device and method based on a velocity field and a direction field. Background technique [0002] Numerical control technology is widely used in equipment manufacturing industries in various countries in the world today to improve manufacturing capabilities and levels. Vigorously developing advanced manufacturing technology with numerical control technology as the core has become one of the important ways for developed countries in the world to accelerate economic development and improve comprehensive national strength and national status. At the same time, the use of high-efficiency processing methods has become an urgent requirement of today's manufacturing industry. With the cooperation of cutting tools and other technologies, cutting machine tools for high-speed and high-precision processing have emerged, mainly var...

AI Technical Summary

Problems solved by technology

However, for free-trajectory contour processing represented by NURBS curves, since the trajectory is an instantaneous mutation, the curvature change is relatively instantaneous, and the traditional contour control method is not effective in reducing the contour error, and the algorithm is complex and impractical.

[0007] Therefore, by constructing the velocity field of the command trajectory, the traditional contour-tracking control problem is transformed into a velocity control problem, which simplifies the control process, but for the free trajectory contour motion control problem represented by NURBS curves, the velocity field is difficult to establish

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