滚控式变质心飞行器动力学特性分析与控制

Analysis of Dynamics Characteristics and Control of a Flight Vehicle with a Moving-Mass Roll Control System

为明确滚控式变质心飞行器的控制机理,为其工程实践提供相应的理论参考,建立包含滑块运动的滚控式变质心飞行器七自由度完整动力学模型,并分析讨论其运动特性以及动力学系统的特点。其次结合频域分析法对滑块运动与载体姿态运动之间的耦合影响以及动态响应过程进行分析研究,揭示了滚控式飞行器的控制机理。同时针对其通道间的耦合效应以及执行机构参数设置对控制能力的影响分析提出了对飞行器结构设计和控制系统设计的相关要求,为滚控式变质心飞行器的工程实践提供一些理论参考。

To investigate the dynamics and the potential of the control mechanism of a fixed-trim re-entry vehicle with a moving-mass roll control system and provide the theoretical references for engineering practices,the 7-DOF dynamic model is generated in this paper.Then,the kinetic characteristics and the dynamic coupling between the moving mass and the carrier are studied with the frequency domain analysis to reveal the control mechanism of the flight vehicle control system.Meanwhile,according to the analysis results of the coupling between three channels and the impact of the actuator parameters on the control authority,some suggestions on the structure and control system design have been made in this paper,which provide the theoretical references for a flight vehicle with a moving-mass roll control system in engineering practices.