Leading type control method and system applied to driving magnetic suspension system

Abstract

The invention discloses a leading type control method and system applied to a driving magnetic suspension system. The leading type control method comprises the following steps that a displacement signal is measured; differential operation is carried out on displacement to obtain a speed signal; and a PID control, an adaptive control and a sliding mode variable structure control are introduced, thelocated stage of a guide rail is judged according to a value of the speed signal, and the strength of three control algorithms is changed to form different characteristic leading control strategies by adjusting factor coefficients of the three control algorithms in an online mode. In an initial operation stage, a stable operation stage and a disturbance affected operation stage, effective controlis carried out according to the characteristic showed by the system; a "soft switching" mode is adopted to avoid the instability caused by the switch in the transition period; and the period and thephase position of the input signal are ensured to be identical completely, so that a control signal undergoes no jump switching under the absolute synchronization.

Description

technical field [0001] The invention relates to a control method of a magnetic levitation system, in particular to a dominant control method and system applied to an active magnetic levitation system, 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 5 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. The feed speed of the machine tool provides technical conditions, avoiding the problems of shortened guide rail life and reduced machining accuracy caused by mechanical friction and direct contact, so 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 t...

AI Technical Summary

Problems solved by technology

[0003] The working plane of the active magnetic levitation guide rail must adopt multi-point support, but for a plane, this kind of multi-point support has active over-constraint

With the in-depth research of active maglev technology, it is found that the active over-constraint of the active maglev guide rail system with multi-point support will cause "flutter", making it difficult to apply advanced control strategies to the active maglev guide rail system with planar multi-point support. It is also difficult to further improve the carrying capacity and control accuracy of the active magnetic levitation guide rail, and even hinders the research work of the active magnetic levitation guide rail.

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