In this dissertation , the re - entry vehicle can be seen as a rigid body system composed of a shell of the vehicle and internal moving mass points , by applying the newton - euler ’ s method , the dynamical equation of mmcrv are derived and the control mechanism is analyzed according to the dynamical equations . several influence factors on the dynamical response of mmcrv is analyzed in detail 将壳体与内部活动质量体看成是一个刚体与质点系组成的多刚体系统,采用newton - euler建模方法完整地推导了变质心再入体的动力学方程,其结果显示了内部活动质量体移动对再入体姿态的影响。
The spatial member - story model is adopted as the dynamic analysis model for base - isolated structures by considering the isolation device as a special element , the dynamical equation is established , time - history analysis is conducted by step - by - step integration and iteration methods , and program of dynamic analysis on base - isolated structures ( dabis ) which can be used for analysis on multi - dimensional and lateral - torsional coupled seismic response of base - isolated structures is worked out 将隔震装置作为特殊单元,采用空间杆系?层模型作为基础隔震结构动力分析模型,建立其运动方程,采用逐步积分法和迭代法进行时程反应分析,编制了可进行基础隔震结构多维及平?扭耦联地震反应分析的基础隔震结构动力分析程序dabis 。
This paper deals with the following three topics with regard to the control of multiple manipulators : 1 . deprive the kinematics and dynamical equations of two manipulators with identical structure on the basis of geometry theory , one of which has two links , giving the inverse solution to the kinematics of the system which consists of the manipulators and the grasped object ; 2 . by use of load - distributing , design a controller coordinating multiple redundant manipulators whose parameters are known 基于微分几何理论推导出两个具有相同结构的二连杆机器人的运动学逆解及与物体所成系统的动力学方程; 2在假设由多个冗余机器人与物体组成系统的动力学模型确知的前提下,利用负荷分配法,设计了一种不仅能使关节力矩优化且能按照一定比例分配负荷的控制器,解决了以往控制器的一些缺陷,即忽视各个机器人的实际承载力,导致一些负荷力小的机器人却必须承担较大的负载,最终损坏机器人; 3