新型平面可控装载机构运动学建模与分析  

Kinematics modeling and analysis of a novel planar controllable loading mechanism

作　　者：石慧[1] 王小纯[1] 高德中[1] 潘宇晨[2] 张林[1] 蔡敢为[1] 

机构地区：[1]广西大学机械工程学院,广西南宁530004 [2]钦州学院物理与电子工程学院,广西钦州535099

出　　处：《广西大学学报（自然科学版）》2014年第5期985-992,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51075077;51365004);南宁市科技局科学研究与技术开发项目(20144223)

摘　　要：应用多自由度可控机构理论设计的新型可控机构式装载机,其结构中含有多个闭环和回路,为了获得此类可控装载机构运动学输入与输出之间的关系及规律,针对其多闭环、多回路的结构特点,采用矢量投影法建立机构运动学模型,求出位置、速度、加速度解,再对其进行运动学仿真分析,通过算例和运动学仿真分析的数据对比,验证了运动学模型的正确性,同时仿真结果还表明:该机构在举升过程中,两主动件的角位移变化范围在20°内,运动范围较小,两主动杆角速度变化范围分别为3°/s和9°/s,角加速度变化范围分别为0.8°/s2和1.7°/s2,变化范围小且曲线较为平缓,说明该机构可以平稳地完成举升工作。通过对新型可控机构式装载机建立运动学模型和仿真分析,可以得到该装载机的输出运动规律,并为后续的控制系统设计工作提供基础。A novel controllable institutional loading mechanism was designed by applying the multi-DOF（ degree of freedom） controllable mechanism design theory, of which structure contains plurality of closed-loops and loops.In order to obtain the kinematic relations and law between the input and output of such a controllable loading mechanism, for its multi-closed loop, multi-loop structure char-acteristics, kinematics model agency was established by applying motion vector projection method, the solution of position, velocity and acceleration were found, then simulation analysis was per-formed.By contrasting the numerical examples and the data of simulation analysis, correctness of the kinematic model was verified.Simultaneously, the simulation analysis results indicated that：in the lifting process of the mechanism, angular displacement range of two active levers was 20°, and the range of variation is small.Angular velocity ranges of two active levers were 3°/s and 9°/s, angular acceleration ranges were 0.8°/s^2 and 1.7°/s^2 , which were small range and the curve of sim-ulation analysis were gentle, it meant that the mechanism can complete the lifting work smoothly. Kinematics modeling and analysis for the novel planar controllable loading mechanism, which can＆amp;nbsp;obtain the kinematic relations and law between the input and output, and provide the basis for subse-quent control system design work.

关 键 词：装载机 多自由度可控机构 运动学建模 运动学仿真 

分 类 号：TH112[机械工程—机械设计及理论]