【摘要】：為研究系繩柔性對連續(xù)地月載荷轉(zhuǎn)移系統(tǒng)(continuous cislunar payloads transfer system,CCPTS)動力學(xué)的影響,利用Lagrange方法建立了CCPTS二維柔性動力學(xué)模型,并對所建立的二維柔性動力學(xué)模型進(jìn)行了理論及仿真分析.通過對系繩為柔性繩與剛性桿兩種情況下的動力學(xué)進(jìn)行仿真對比分析表明:系繩柔性對CCPTS軌道、姿態(tài)參數(shù)有一定的影響,而這種影響表現(xiàn)為變量變化的時間不同步,并且會隨著時間的推移逐漸增大;系繩的柔性特性導(dǎo)致母星徑向加速度以及真近角加速度出現(xiàn)"毛刺"現(xiàn)象;由系繩長度所產(chǎn)生的重力梯度力矩對剛性桿和柔性繩產(chǎn)生了不同程度的影響;當(dāng)外力矩不存在時,系繩旋轉(zhuǎn)角速度隨時間周期變化,當(dāng)外力矩不為零時,旋轉(zhuǎn)角速度隨時間近似線性增加,增加的快慢由外力矩的大小決定.此外,系繩初始旋轉(zhuǎn)角速度以及系繩長度對系繩的橫向、縱向振動的幅值和周期均產(chǎn)生了一定的影響.
[Abstract]:In order to study the effect of mooring flexibility on the dynamics of continuous lunar load transfer system (continuous cislunar payloads transfer system), a two-dimensional flexible dynamic model of CCPTS is established by using Lagrange method, and the theoretical and simulation analysis of the two dimensional flexible dynamic model is carried out. The simulation results show that the flexibility of the tether has a certain influence on the CCPTS orbit and the attitude parameters, and the effect is that the time of variable change is out of sync. The flexibility of the tether leads to the "burr" phenomenon of the radial acceleration and the true angular acceleration of the parent star. The gravity gradient torque produced by the length of the tether has different effects on the rigid rod and flexible rope, when the external torque does not exist, the rotation angular velocity of the tether varies with the period of time, and when the external moment is not 00:00, The angular velocity of rotation increases linearly with time, and the increase is determined by the magnitude of external torque. In addition, the initial rotation angular velocity and the length of the tether have a certain influence on the amplitude and period of the transverse and longitudinal vibration of the tether.
【作者單位】： 哈爾濱工業(yè)大學(xué)航天學(xué)院;
【基金】：CAST重點創(chuàng)新基金(CAST20090801)
【分類號】：V476.3
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本文編號：2125406