一种运载火箭弹性自主辨识与自适应控制方法  

A Method for Elastic Autonomous Identification and Adaptive Control of Launch Vehicles

作　　者：邵梦晗 胡海峰[1,2] 潘豪 宋征宇[3] 李竞元 黄聪 钟鸿豪 SHAO Menghan;HU Haifeng;PAN Hao;SONG Zhengyu;LI Jingyuan;HUANG Cong;ZHONG Honghao(Beijing Aerospace Automatic Control Institute,Beijing 100854,China;National Key Laboratory of Aerospace Intelligence Control,Beijing 100854,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]北京航天自动控制研究所,北京100854 [2]宇航智能控制国家级重点实验室,北京100854 [3]中国运载火箭技术研究院,北京100076

出　　处：《宇航学报》2023年第12期1916-1924,共9页Journal of Astronautics

基　　金：国防基础科研课题(JCKY2018203B022)。

摘　　要：针对新一代运载火箭箭体空间模态复杂、刚晃弹交联耦合严重、空间模态数据不确定大偏差导致控制参数适应性不足和弹性稳定裕度小的问题,提出一种运载火箭弹性频率在线辨识和自适应控制方法。该方法基于线性调频Z变换(CZT)完成主要弹性频率信号的辨识,并在线提取控制指令中的弹性能量,据此实现基于自适应增广控制(AAC)的控制参数在线调节,提高控制系统在不确定高阶弹性振动下的适应范围和稳定裕度,并详细分析了各项调节参数对系统稳定性的影响。仿真结果表明,提出的“CZT+AAC”方法能够较好地完成弹性稳定控制任务,显著增强运载火箭任务适应性和飞行可靠性。Aiming at the complex spatial modalities,serious coupling of rigid,sloshing,and elastic motion of liquid launch vehicles,as well as the problems of insufficient adaptability of control parameters and elastic stability margin caused by uncertain deviations in spatial modal data,an online identification and adaptive control method for elastic vibration of launch vehicles is proposed.This method completes the identification of the main elastic signal frequencies based on chirp Z transform(CZT),and obtain the elastic energy of the control command online.Accordingly,it achieves online adjustment of the control parameters based on adaptive augmenting control(AAC),improving the adaptive range and stability margin of the control system under uncertain elastic vibration.A detailed analysis is conducted on the impact of various adjustment parameters on system stability.Simulation results show that,the ‘CZT+AAC' method proposed can better complete the elastic stability control task,significantly enhancing the adaptability to the task and flight reliability.

关 键 词：运载火箭 弹性频率辨识 线性调频Z变换(CZT) 自适应增广控制(AAC) 稳定性分析 

分 类 号：V525[航空宇航科学与技术—人机与环境工程]