A complete attitude-servo dynamics model,including the deflection motion of the slider,is established to address the structural parameter design problem for a class of high-mass-ratio moving-mass reentry vehicles(MMRV)with roll control system and further analyse the impact of slider parameter on the coupling characteristics of attitude dynamics of MMRV.Firstly,the longitudinal static stability region of the vehicle is given based on the Routh criterion,and the relationship between the trim angle of attack and the configuration parameters of the slider is discussed.The dynamics coupling analysis of the vehicle system shows that the deflection of the slider can affect the yaw attitude while controlling the roll attitude,resulting in a decrease in control accuracy and even instability of attitude control.In order to reduce the influence of roll maneuver on yaw channel and improve the control performance by optimizing the vehicle structure,the multiple scales method is used to analyze the amplitude-frequency response characteristics of the coupled nonlinear dynamic system composed of slider deflection and vehicle's yaw attitude motion under different slider design parameters,and a configuration design scheme for a class of high-mass-ratio MMRV with roll control system considering roll-yaw coupling constraints is provided to improve the system performance.
关键词
变质心飞行器/动力学耦合/非线性振动/结构参数设计
Key words
Moving mass reentry vehicle/Dynamics coupling/Nonlinear vibration/Structural parameter design
维普
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