Servo system for tracking moving target by linear variable-coefficient servo driving radar antenna

Abstract

The invention provides a servo system for tracking a moving target by a linear variable-coefficient servo driving radar antenna. A servo controller consists of a position error selector, a position corrector, a speed corrector, a current corrector, a power amplifying element and an execution mechanism which are connected in series with one another; current of a motor is fed back by a Hall sensor to form a current loop of the servo system, and speed of the motor is fed back by a speed measurer coaxial with the motor to form a speed loop of the servo system; an antenna position is fed back by a position detection element coaxial with the radar antenna to a target position detector to form a position loop of the servo system; a circuit of the servo controller comprises a digital signal processor (DSP) and a field programmable gate array (FPGA) which are connected with each other through an address bus and a data bus; the built-in linear equation variable-coefficient operation of the DSP and the operation treatment of the three loops controls the motor to drive the antenna to run; and the FPGA exchanges data with the DSP through a programmed decoding circuit, and transmits and receives serial communication interface (SCI) data. According to the servo system, the radar tracking error can be reduced quickly, and the radar tracking precision is improved.

Description

technical field [0001] The invention relates to a servo system for a linear variable coefficient servo driving radar antenna to track a moving target. Background technique [0002] At present, the three closed-loop calculation processing and control of the current loop, speed loop and position loop of the tracking radar servo system often use the classic automatic control theory to design the PID (proportional, integral, differential) control processing algorithm of the current, speed and position three closed loops. For the position error, the traditional fixed proportional coefficient or segmented proportional coefficient correction method is often used. Using the above-mentioned existing technology to track small signal error has slow response speed, easy to track lag, poor tracking accuracy of the system, fast response speed to track large signal error, easy to track overshoot, and poor radar tracking stability. Contents of the invention [0003] Aiming at the shortco...

AI Technical Summary

Problems solved by technology

Using the above existing technology to track small signal error response speed is slow, easy to track lag, system tracking accuracy is poor, tracking large signal error response speed is fast, easy to track overshoot, and radar tracking stability is poor

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