基于改进加速度惯量反馈的机载激光通信平台稳定策略  

Stability Decision of Airborne Laser Communication Platform Based on Improved Acceleration Inertia Feedback

作　　者：曲正[1] 常帅[1] 董岩[1] 宋延嵩[1] Qu Zheng;Chang Shuai;Dong Yan;Song Yansong(National Defense Key Discipline Laboratory on Space-Ground Laser Communication,Changchun University of Science and Technology,Changchun,Jilin 130022,China)

机构地区：[1]长春理工大学空地激光通信技术国防重点学科实验室,吉林长春130022

出　　处：《光学学报》2021年第23期67-76,共10页Acta Optica Sinica

基　　金：中央引导地方科技发展基金(202002036JC)。

摘　　要：在闭环控制回路中引入限幅型加速度惯量反馈和扩张状态观测器复合的优化算法,保证机载激光通信平台对瞬态阶跃响应的稳定性,优化了平台对环路各阶扰动的抑制能力。从系统扰动响应的角度对常规加速度惯量反馈算法进行阐述,分析了该算法的输入输出(I/O)特性和扰动抑制能力,并指出它在实际应用中存在的问题。逐一地引入限幅算法、降阶扩张状态观测器对常规加速度惯量算法进行分步改进,给出改进过程中的性能分析和特性分析。搭建仿真模型和物理实验对所提优化算法进行验证。实验结果表明:当平台以70(°)/s的速度阶跃时,改进后的控制环路的阶跃超调量幅值约为比例-积分-微分(PID)控制环路的50%;当平台进行5(°)/Hz的空间扰动隔离时,与PID控制环路相比,改进后的平台对信标光的动态稳定精度从198μrad[均方根(RMS)统计方式]提升至14.28μrad(RMS),控制环路的动态扰动隔离度有11.42 dB的优化表现。An optimization algorithm combining limiting acceleration inertia feedback and an extended state observer was implemented in the closed-loop control loop to ensure the stability of the airborne laser communication platform to transient step response and optimize the platform’s ability to suppress various order disturbances in the loop.Considering the system disturbance response as the breakthrough perspective,the conventional acceleration inertia feedback algorithm was explained,and the I/O characteristics and disturbance suppression ability of the algorithm were studied.Problems were found in the practical application as indicated.Limiting algorithms and reduced-order extended state observer were individually incorporated to improve conventional acceleration inertia feedback algorithms by step.The performance analysis and character analysis of the improvement process were studied.The proposed optimization algorithm was verified by simulation processes and physical experiments.The experimental results show that when the platform steps at a speed of 70(°)/s,the step overshoot of improved control loop is approximately 50% that of the proportion-integration-differentiation(PID)control loop.Compared to the stable accuracy of the PID control loop[198μrad root mean square(RMS)],when the platform performed spatial disturbance isolation of 5(°)/Hz,the dynamic stability accuracy of the improved platform for beacon light improves to 14.28μrad(RMS).Further,the disturbance isolation of the improved control loop has an optimized performance of 11.42 dB.

关 键 词：光通信 加速度惯量反馈 机载激光通信平台 光轴稳定 扩张状态观测器 扰动响应 扰动隔离 

分 类 号：TN929.1[电子电信—通信与信息系统] TP79[电子电信—信息与通信工程]