上海交通大学：《力学仿生——启示与探索》课程教学资源（论文资料）陆地仿生_2014-混合驱动型腿部机构的设计与实验研究.pdf_大学文库

摘要摘要随着移动机器人应用范围的不断扩展，在高山丛林作战、荒原湿地考察、防灾救援排爆等应用场合对机器人灵活机动性和环境适应性的要求越来越高，研究和探索具有高效能的多足移动机构成为了当前多足机器人领域亟待解决的迫切问题。传统意义上的多足机器人采用伺服控制的开链机构作为多足移动机构，由于关节驱动器需要不停做往复运动，不断克服惯性做功，能量在正反转切换过程中损失极大，因此难以实现机器人的快速步态。基于以上考虑，在对过去所研制的仿生关节型四足机器人进行实验测试和理论研究的基础上，提出了“混合驱动型多足移动机构”的设计概念。混合驱动型多足移动机构是一类多自由度机构，由单向连续旋转的大功率普通动力源和随动控制的伺服动力源进行混合驱动，大功率普通动力源带动曲柄连续转动；伺服动力源实时调节机构末端点的运动轨迹，从而实现多足机器人的步态控制。本文综合传统机械系统和全伺服机械系统的优点，设计出了基于混合驱动机构的四足机器人，既能够实现快速移动，同时也具有良好的灵活机动能力。本文首先综述了移动机器人和混合驱动机构的发展状况，分析了目前多足机器人研究领域遇到的瓶颈问题。为了提高多足机器人的移动效率，在机器人腿部机构的设计中引入了混合驱动机构。研究内容主要包括：平面闭链连杆机构的构型综合、混合驱动机构的运动学分析、机电耦合建模与虚拟样机仿真技术、机构执行器轨迹规划方法与实验研究等。平面闭链连杆机构的构型综合，分析了单自由度连杆机构与两自由度连杆机构的构型综合，并且给出了各种类型的缩图形式和结构简图。接着分析了平面四杆机构和混合驱动五杆机构的机构分类，重点对混合驱动七杆机构进行了结构分析。混合驱动机构的运动学分析分为正运动学分析和逆运动学分析。正运动学分析，己知机构结构型式和尺寸参数，通过给定驱动杆件的运动规律，求解得到从动杆件的位移、速度和加速度，得到了机构执行器的工作空间和轨迹曲线簇，利用雅克比矩阵分析了机构的速度特性和影响速度特性的主要因素。逆运动学分析，通过给定机构执行器的运动轨迹和常速电机的转速，求解得到同服电机的角位移、角速度和角加速度。机电耦合建模与虚拟样机仿真技术，利用拉格朗日方法建立了混合驱动机构的动力学方程。由于实际过程中电机的动力特性直接影响整体机构的运动精度，因此有必要引入电机的动力学方程，进行机电耦合建模。在ADAMS软件中对机电耦合模型进行仿真分析，得到了不同电压下电机电流和曲柄角速度的变化曲线。 I

摘要摘要随着移动机器人应用范围的不断扩展，在高山丛林作战、荒原湿地考察、防灾救援排爆等应用场合对机器人灵活机动性和环境适应性的要求越来越高，研究和探索具有高效能的多足移动机构成为了当前多足机器人领域亟待解决的迫切问题。传统意义上的多足机器人采用伺服控制的开链机构作为多足移动机构，由于关节驱动器需要不停做往复运动，不断克服惯性做功，能量在正反转切换过程中损失极大，因此难以实现机器人的快速步态。基于以上考虑，在对过去所研制的仿生关节型四足机器人进行实验测试和理论研究的基础上，提出了“混合驱动型多足移动机构”的设计概念。混合驱动型多足移动机构是一类多自由度机构，由单向连续旋转的大功率普通动力源和随动控制的伺服动力源进行混合驱动，大功率普通动力源带动曲柄连续转动；伺服动力源实时调节机构末端点的运动轨迹，从而实现多足机器人的步态控制。本文综合传统机械系统和全伺服机械系统的优点，设计出了基于混合驱动机构的四足机器人，既能够实现快速移动，同时也具有良好的灵活机动能力。本文首先综述了移动机器人和混合驱动机构的发展状况，分析了目前多足机器人研究领域遇到的瓶颈问题。为了提高多足机器人的移动效率，在机器人腿部机构的设计中引入了混合驱动机构。研究内容主要包括：平面闭链连杆机构的构型综合、混合驱动机构的运动学分析、机电耦合建模与虚拟样机仿真技术、机构执行器轨迹规划方法与实验研究等。平面闭链连杆机构的构型综合，分析了单自由度连杆机构与两自由度连杆机构的构型综合，并且给出了各种类型的缩图形式和结构简图。接着分析了平面四杆机构和混合驱动五杆机构的机构分类，重点对混合驱动七杆机构进行了结构分析。混合驱动机构的运动学分析分为正运动学分析和逆运动学分析。正运动学分析，已知机构结构型式和尺寸参数，通过给定驱动杆件的运动规律，求解得到从动杆件的位移、速度和加速度，得到了机构执行器的工作空间和轨迹曲线簇，利用雅克比矩阵分析了机构的速度特性和影响速度特性的主要因素。逆运动学分析，通过给定机构执行器的运动轨迹和常速电机的转速，求解得到伺服电机的角位移、角速度和角加速度。机电耦合建模与虚拟样机仿真技术，利用拉格朗日方法建立了混合驱动机构的动力学方程。由于实际过程中电机的动力特性直接影响整体机构的运动精度，因此有必要引入电机的动力学方程，进行机电耦合建模。在ADAMS软件中对机电耦合模型进行仿真分析，得到了不同电压下电机电流和曲柄角速度的变化曲线

ABSTRACT ABSTRACT As the scope of mobile robot application is constantly expanding,such as jungle warfare in the mountains,desert wetland investigation,disaster prevention and so on, the demand of robot flexible mobility and environmental adaptability is higher and higher.The research and exploration in the multi-legged moving mechanism become an urgent problem to be solved in the current multi-legged robot research field. Traditionally,multi-legged robot applies servo controlled open-chain mechanism as multi-legged moving mechanism.Because the joint drive needs to act continuously and overcome constantly inertia power,the energy loss in the process of the reversible switch is great.Hence,it is difficult to achieve rapid gait of the robot.Based on the experimental test and the theoretical research on the bionic joint quadruped robot in the past,it puts forward the design concept called "the hybrid-driven multi-legged moving mechanism".Hybrid-driven multi-legged moving mechanism is a kind of the mechanism with multiple degrees of freedom.It is driven by high-power source of the unidirectional continuous rotation and servo-power source.The high-power source drives the crank to rotate continuously.The servo-power source adjusts continually the trajectory of the end point,so as to realize the gait control of multi-legged robot. This paper integrated the advantages of traditional mechanical system with the advantages of servo mechanical system,and it designed the quadruped robot based on the hybrid-driven mechanism.It could not only realize fast moving,but also have a good ability of flexibility. This paper first reviewed the development of the mobile robot and the hybrid-driven mechanism,and analyzed the current bottleneck problems of multi-legged robot in the research field.In order to improve the efficiency of mobile robot,the hybrid-driven mechanism was introduced in the design of the robot leg mechanism.The research content is mainly as follows:the configuration synthesis of the planar closed-chain linkage,the kinematics analysis of the hybrid-driven mechanism,electromechanical coupling modeling and virtual prototype simulation technology,the trajectory planning method of mechanism actuator and experimental research,etc. The configuration synthesis of the planar closed-chain linkage analyzed two configuration syntheses.One was the configuration synthesis of the single degree of freedom linkage;the other was the configuration synthesis of the two degree of freedom linkage.Besides,it offered all kinds of thumbnail form and structure diagram. I

ABSTRACT ABSTRACT As the scope of mobile robot application is constantly expanding，such as jungle warf打e in the mountains，desert wetland investigation，disaster prevention and SO on， the demand of robot flexible mobility and environmental adaptability is higher and higher．The research and exploration in the multi-legged moving mechanism become an urgent Droblem to be solved in the current multi—legged robot research field． Traditionally,multi．1egged robot applies servo controlled open’chain mechanism as multi．1egged moving mechanism．Because the joint drive needs to act continuously and overcome constantly inertia power,the energy loss in the process of the reversible switch is great．Hence，it is difficult to achieve rapid gait of the robot．Based on the experimental test and the theoretical research on the bionic joint quadruped robot in the past，it puts forward the design concept called”the hybrid-driven multi-legged moving mechanism”．Hybrid．driven multi．1egged moving mechanism is a kind of the mechanism with multiple degrees of freedom．It is driven by high。power source of the unidirectional continuous rotation and servo-power source．The high‘power source drives me crank to rotate continuously．The servo-power source adjusts continually the trajectory of the end point，SO as tO realize the gait control of multi—legged robot． This paper integrated the advantages of traditional mechanical system with the advantages of servo mechanical system，and it designed the quadruped robot based on the hybrid．driven mechanism．It could not only realize fast moving，but also have a good ability of flexibility． This paper first reviewed the development of the mobile robot and the hybrid．driven mechanism，and analyzed the current bottleneck problems of multi．．1egged robot in the research field．In order to improve the efficiency of mobile robot．the hybrid．driven mechanism was introduced in the design of the robot leg mechallism．The research content is mainly as follows：the configuration synthesis of tlle planar closed．chain linkage，the kinematics analysis of the hybrid-driven mec_h砸sm，electromechanical coupling modeling and virtual prototype simulation technology,the trajectory planning method of mechanism actuator and experimental research，etc． The configuration synthesis of the planar closed-chain linkage analyzed two configuration syntheses．One was the configuration synthesis of the single degree of freedom linkage；the other was the configuration synthesis of the two degree of freedom linkage．Besides，it offered all kinds of thumbnail form and structure diagram· III

ABSTRACT Then it analyzed the classification of the planar four-bar linkage and hybrid-driven five-bar linkage,focusing on the structural analysis of the hybrid-driven seven-bar linkage. The kinematics analysis of the hybrid-driven mechanism was divided into the forward kinematics analysis and the inverse kinematics analysis.The forward kinematics analysis was as follows:Firstly,the structural form of mechanism and size parameters were known.Then the law of motion of driving linkage was given.Finally, the result could obtain the displacement of driven bar and its velocity and acceleration. Meanwhile,it gained the workspace of the actuators and the trajectory curves.It analyzed the speed characteristics of the mechanism and the main factors affecting the speed characteristics by making use of Jacobi matrix.The inverse kinematics analysis was as follows:the trajectory of the actuator and the speed of constant speed motor were known,the result could obtain the angular displacement of the servo motor,the angular velocity and angular acceleration. The electromechanical coupling modeling and virtual prototype simulation technology established the dynamic equations of hybrid-driven mechanism by taking advantage of Lagrange method.Since the dynamic characteristics of the motor directly affected the kinematic accuracy of the overall mechanism in the actual process,it was necessary to introduce the dynamic equation of the motor for electromechanical coupling modeling.In the ADAMS software,simulation analysis was carried out on the electromechanical coupling model,and it obtained the changing curves of both motor current and crank angular velocity under different voltage. The experimental study on the trajectory planning method of actuator introduced respectively two methods.One was the trajectory planning method based on the inverse kinematics analysis.The other was based on trajectory curves.The above two methods were studied experimentally,basing on the hybrid-driven five-bar linkage experimental platform,the results showed error curve of circular trajectory.Due to the particularity of the seven-bar linkage configuration,the specific trajectory of robot leg mechanism was achieved by method of trajectory curves.Basing on the experimental platform of robot leg mechanism,the experimental study of four different trajectories was carried out,of which the result verified the feasibility of the method. Finally,the paper summarized the main conclusions of the research work,and put forward some prospects for follow-up work,in the hope of further research on V

ABSTRACT Then it analyzed the classification of the planar four-bar linkage and hybrid—driven five．bar linkage。focusing on the structural analysis of the hybrid-driven seven-bar linkage． The kinematics analysis of the hybrid．driven mechanism was divided into the forward kinematics analysis and the inverse kinematics analysis．The forward kinematics analysis was as follows：Firstly,the structural form of mechanism and size par锄eters were known．Then the law of motion of driving linkage was given．Finally, the result could obtain the displacement of driven bar and its velocity and acceleration． Meanwhile，it gained the workspace of the actuators and the trajectory curves．It analyzed the speed characteristics of the mechanism and the main factors affecting the speed characteristics by making use of Jacobi matrix．The inverse kinematics analysis was as follows：the trajectory of the actuator and the speed of constant speed motor were known．me result could obtain the angular displacement of the servo motor,the angular velocity and angular acceleration． The electromechanical coupling modeling and virtual prototype simulation technology established the dynamic equations of hybrid-driven mechanism by taking advantage of Lagrange method．Since the dynamic characteristics of the motor directlv affected the kinematic accuracy of the overall mechanism in the actual process，it was necessary to introduce the dynamic equation of the motor for electromechanical coupling modeling．In the ADAMS software，simulation analysis was carried out on the electromechanical coupling model， and it obtained the changing curves of both motor current and crank angular velocity under different voltage． The experimental study on the trajectory planning method of actuator introduced respectivelv two methods．One was the trajectory planning method based on the inverse kinematics analysis．The other Was based on trajectory curves．The above two methods were studied experimentally,basing on the hybrid—driven five-bar linkage experimental platform，the results showed error curve of circular trajectory．Due to the particularity of the seven-bar linkage configuration，the specific trajectory of robot leg mechanism was achieved by method of trajectory curves．Basing on the experimental platform of robot leg mechanism，the experimental study of four different trajectories was c秭ed out．of which the result verified the feasibility of the method． Finally,the paper summarized the main conclusions of the research work，and put forward some prospects for follow-up work，in the hope of further research on IV