摘要
为获取高分辨率、高准确度的精细光谱,在光谱探测系统中,需要实现大光程差,高平稳的往复扫描调制;扫描过程是由电机驱动。文章通过分析扫描特性,建立了永磁同步直线电机的数学模型,设计了速度反馈环和比例积分控制器的位置反馈环。鉴于电机机械轴承存在摩擦,会产生周期性干扰力矩,造成速度波动,文章提出改进型重复控制方法进行抑制。仿真结果表明,当角镜往复扫描时,与PI控制器相比,改进型重复控制器能够根据每个周期的误差值调整控制量,经过3个周期将速度波动降低了73%;当系统存在周期性外界扰动时,速度调整能力提高了40%。所提出的方法能够实现干涉光程差扫描的匀速性,对干扰力矩有较强的自适应能力,为伺服系统跟踪或抑制重复性外激励信号提供借鉴。
To obtain the fine spectra with high resolution and accuracy,it is necessary for a spectrum detection system to have the capability of large optical path difference and stable optical path reciprocal scanning modulation.According to the scanning characteristics,a mathematical model of the permanent magnet synchronous motor is established,and then a speed feedback loop and a position feedback loop with the proportional integral controller are investigated in the paper.As the periodic disturbances induced by friction of the mechanical bearing can cause velocity fluctuations,an improved repetitive control method is developed.The simulation results indicate that when the corner mirror reciprocating,the modified repetitive controller reduces speed fluctuation by 30%over 3 periods compared to the PI controller;and when the system has periodic external disturbances,the speed adjustment capability is increased by 40%.The proposed method can achieve uniform scanning of the optical path difference and has good ability to suppress interference torques.Therefore,the proposed method can provide a reference for the servo system to track or suppress repetitive external signals.
作者
郭兰杰
王浩
王淳
马文坡
林喆
GUO Lanjie;WANG Hao;WANG Chun;MA Wenpo;LIN Zhe(Beijing Institute of Space Mechanics & Electricity,Beijing 100094,China;Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing,Beijing 100094,China)
出处
《航天返回与遥感》
CSCD
2019年第1期32-40,共9页
Spacecraft Recovery & Remote Sensing
基金
国家重点研发计划:高效率
大光程
高灵敏度干涉成像技术(2016YFB0500702)
关键词
光谱分辨率
光程差
比例积分控制
重复控制
光学遥感
spectral resolution
optical path difference
proportional integral
repetitive control
optical remote sensing
作者简介
郭兰杰,女,1989年生,中国空间技术研究院飞行器设计专业在读博士研究生,研究方向为傅里叶变换光谱仪的干涉仪控制系统设计。E-mail:lanjieguoedu@163.com.
