Over-constraint judgment method applied to multi-point supporting system

Abstract

The invention discloses an over-constraint judgment method applied to a multi-point supporting system. The over-constraint judgment method comprises the following steps that supporting point signals on planes of multiple supporting points are connected to corresponding channels for measurement; the phase of one point is compared with the phase of other supporting points; a balance equation of theelectromagnetic force is established; the over-constraint point is judged; and the current of other supporting points is adjusted so as to provide conditions for the implementation of the magnetic damping. The adjusting method comprises the following steps that a displacement signal is measured; the support force increment of each point is calculated; the consistency of the point A and the increment direction of other points is judged; when the point A is consistent with the increment direction of other points, the new increment is reserved, and the loop variables are added to 1; when the point A is inconsistent with the increment direction of other points, the bias current of a transition point and the bias current of a dual point are adjusted, the bias current inx0 of the transition point is adjusted to be inx0+delta ixi, the bias current imx0 of the dual point is adjusted to be imx0+delta i (1-xi), in this way, repeated detection and adjustment are continuously carried out, under the control of the active magnetic damping force, finally the plurality of supporting points fall onto a plane. According to the method, the flutter phenomenon in the active magnetic suspension guide rail can be eliminated.

Description

technical field [0001] The invention relates to a method for judging over-constraint in the plane support of a magnetic levitation guide rail, and belongs to the technical field of numerical control machining. Background technique [0002] Active magnetic levitation guide rails are usually used in CNC machine tool processing. Since there is no contact between the slide box and the guide plate of the active magnetic levitation guide rail during relative movement, the movement resistance is greatly reduced, thus speeding up the motion response of the guide rail. In order to improve the CNC machine tool The high feed speed provides technical conditions and avoids the problems of shortened guide rail life and reduced machining accuracy caused by mechanical friction and direct contact. Therefore, the reliability of active magnetic levitation guide rails is much higher than that of ordinary guide rails. Compared with the static pressure guide rail, since the active magnetic levita...

AI Technical Summary

Problems solved by technology

There are multiple support points in the plane of the active magnetic levitation guide rail, and multiple support points generate multiple working planes, which will cause chatter of the active magnetic levitation guide rail

[0003] With the in-depth study of active magnetic levitation technology, it is found that the active over-constraint of the active magnetic levitation guide rail system with multi-point support will cause "flutter", which makes it difficult to further improve the carrying capacity and control accuracy of the active magnetic levitation guide rail, and even hinders the active magnetic levitation guide rail. research work

Images