Subdivided signal error compensation method of photoelectric encoder of tracking control platform

Abstract

The invention provides a subdivided signal error compensation method of a photoelectric encoder of a tracking control platform. The subdivided signal error compensation method is suitable for the tracking control platform which is formed by a main processor module, a storage module, a display module, a power module, an execution module, a controlled module, an photoelectric encoder measurement module, a communication interface module and a human-computer interaction module. The compensation is performed on the subdivided signal error of the encoder measurement module through the controlled object position of the tracking control platform. The practicability and the field adaptability are high and accordingly an expensive error detection device is not required and a large time delay of complex algorithm does not need to be brought to the platform. Meanwhile, only the shaft system position information needs to be obtained, the tracking control platform, an encoder angle measuring module and a lower layer of software and hardware structure of the platform do not need to be known, and accordingly the portable capability and the operational capability are high, the time and the labor are saved, and a good solution is provided for the encoder subdivided signal error problem which is common in the field of photoelectric tracking control platforms.

Description

technical field [0001] The invention belongs to the technical field of precision tracking and control, and in particular relates to a method for compensating subdivision signal errors of a photoelectric encoder on a tracking control platform. Background technique [0002] The tracking control platform has strict requirements on capture, tracking and aiming, and the accuracy needs to be on the order of arc seconds, and even needs to work at ultra-low speed, which puts forward high requirements on the precision and accuracy of the shaft angle measurement of the photoelectric encoder. The period size of the grating signal, the consistency and edge definition of the grating, the quality of the optical filter, the characteristics of the photoelectric detection element and the stability and dynamic performance of the output analog signal in the subsequent processing are the main factors affecting the measurement accuracy of the photoelectric encoder. For angle encoders without bui...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the serious impact of the encoder subdivision signal error on the stability of the tracking control platform and tracking control accuracy, the current commonly used subdivision signal error compensation method has the advantages of practicability, field adaptability, price, portability and operability. and real-time aspects can not meet the demand, the present invention provides a tracking control platform photoelectric encoder subdivision signal error compensation method

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