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Control system and method of fast-steering mirror

A control system and reflector technology, applied in the control system, AC motor control, installation, etc., can solve the problems of equal output size, high motor parameters, inconsistency, etc., and achieve uniform force, high stability, and improved stability The effect of sexuality and environmental adaptability

Active Publication Date: 2015-04-15
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem that when the motors are connected in series in the existing mirror control method, a relatively high driving power is required and there is inconsistency in machining and motor parameters, so that the two motors on the same axis cannot output forces of equal magnitude and opposite directions. limitations and other issues, a control method for fast mirrors is provided

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  • Control system and method of fast-steering mirror
  • Control system and method of fast-steering mirror
  • Control system and method of fast-steering mirror

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specific Embodiment approach 1

[0018] Specific implementation mode one, combination figure 1 In this embodiment, the control system of the fast reflector includes four voice coil motors, four motor power amplifiers, four current sensors, four position sensors, four current controllers, two position controllers, and in addition, There are four proportional amplifiers.

[0019] The armature currents of the four voice coil motors are collected by four current sensors. The current collected by the four current sensors is used as the current feedback quantity. The four current feedback quantities are different from the four current given quantities, and the current error passes through the four current sensors. The calculation and correction of a current controller, and the calculation results are respectively given to the four motor power amplifiers, and the four motor power amplifiers respectively drive and control the four voice coil motors, forming four current closed-loop control systems, respectively controll...

specific Embodiment approach 2

[0024] Specific implementation mode two, combination figure 1 In this embodiment, the control method of the fast reflector is mainly aimed at the fast reflector driven by two-axis four motors. The control method adopts double closed-loop control. Each deflection axis includes a position loop and two current loops, where the inner loop is Current loop, the outer loop is a position loop. Since the two axes of the fast mirror are distributed orthogonally, there is no coupling relationship in theory, so each deflection axis can be controlled independently.

[0025] The two current loops on the X axis are mainly composed of current controller 1, power amplifier 1, current sensor 1, voice coil motor 1, current controller 2, power amplifier 2, current sensor 2, voice coil motor 2, and proportional amplifier 1 and It consists of a proportional amplifier 2, and the outer loop is a position control loop, which is mainly composed of a position controller 1, a position sensor 1, a position ...

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Abstract

The invention relates to a control system and method of a fast-steering mirror and solves the problems such that the existing control method of the fast-steering mirror requires a high drive power during motor serial connection and has non-uniform machining and motor parameters, thus two motors on a same shaft cannot output forces equal in magnitude and opposite in direction and limitedness occurs. According to the control method for the fast-steering mirror under dual-axis four-motor driving, dual closed-loop control is adopted, and each deflecting shaft comprises a position ring and two current rings arranged within the position ring. Two axes of the fast-steering mirror are orthogonal, no coupling relation occurs theoretically, and thus each defecting shaft engages in independent control. The control system allows proportionality coefficients of input ends of two current controllers to be flexibly adjusted, motion of the two motors on the same shaft are synchronized, a mechanical system of the fast-steering mirror is evenly stressed, and operational stability and environmental adaptability are improved.

Description

Technical field [0001] The invention relates to the field of precision tracking and precision control, in particular to a method for controlling a fast reflector driven by a voice coil motor. Background technique [0002] As a beam control device, the fast reflector has the characteristics of high resonance frequency, fast response speed, and flexible control. It has been widely used in astronomical telescopes, laser communications, adaptive optics, precision tracking control and other fields. [0003] At present, the driving components of fast reflectors mainly include piezoelectric ceramics and voice coil motors. The control method described in this patent is mainly aimed at a fast reflector driven by a voice coil motor. Two-axis fast mirrors often use four driving devices to achieve the deflection of two orthogonal axes. Among them, each axis controls the deflection of the mirror through the push-pull movement of two drivers. This driving method can improve the fast mirror At ...

Claims

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Application Information

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IPC IPC(8): G02B7/182H02P25/02
CPCG02B7/182H02P25/034
Inventor 王帅曹玉岩孟浩然
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI