Servo positioning control system and method

Abstract

The invention provides a servo positioning control system which comprises a position ring control unit, a position instruction receiving unit, an instruction residue calculation unit and an interpolation displacement calculation unit. The position instruction receiving unit is used for receiving position instructions from an upper computer according to the communication cycle T, the instruction residue calculation unit is used for calculating the position instruction residues in the current communication cycle in an iterative mode according to the position instructions received from the upper computer, the interpolation displacement calculation unit is used for calculating the interpolation displacement value, produced each time when the cycle is scheduled, in the current communication cycle according to the position instructions and the instruction residues, and the position ring control unit outputs position ring scheduling instructions with the interpolation displacement values according to the scheduling cycle T0, wherein T is equal to the product of n and T0 and n is a positive integer. The invention further provides a corresponding method. By rescheduling the position instructions in each communication cycle, the step change of the position instructions is avoided, and the speed can be stably changed.

Description

technical field [0001] The invention relates to the field of servo drives, and more specifically, to a servo positioning control system and method. Background technique [0002] The servo driver is a controller used to control the servo motor, and is mainly used in high-precision positioning systems. The servo drive generally controls the servo motor through three methods of position, speed and torque to achieve high-precision positioning of the transmission system. [0003] In the servo positioning system with a given position command through low-speed communication, multiple position loop scheduling cycles can only receive position command information from the host computer once, which makes the servo positioning system not move continuously and the speed fluctuates greatly. [0004] In order to weaken the speed jitter in the above-mentioned servo positioning system, a first-order low-pass filter or an average value filter is usually introduced to filter the position comm...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a servo positioning control system and method for the problem of slow response speed of the above servo positioning system when eliminating speed jitter

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