【作者】 廖波；

【导师】 尚建忠；

【作者基本信息】 国防科学技术大学 ， 机械工程， 2011， 硕士

【摘要】 目前,种类繁多的模块化机械臂已在制造、自动化、服务、军事等众多领域替代人类执行各种任务。传统的模块化机械臂主要由关节模块和连杆模块组成,关节模块包括单自由度的旋转关节、自旋转关节和移动关节三种形式,每种关节内都装有独立的驱动和传动单元;连杆模块是个零自由度结构,内部没有独立的驱动和传动单元,只起连接作用。为适应日益复杂和多样的机械臂动作需求,提高手臂的运动灵活性,采用能够同时承担关节模块和连杆模块的新型机器人模块是模块化机械臂发展的方向之一。本文针对模块化机械臂的发展需求,设计提出了一种基于Sarrus机构的模块化机器人拟人手臂。利用Sarrus机构在机器人手臂中能够同时传递运动、动力和连接两相邻模块的特点,能够有效拓展机械臂的工作空间,增强其运动灵活性。本文分析了Sarrus机构的运动特性,建立了机器人手臂的参数化模型,并采用理论分析方法和虚拟仿真技术对该机器人手臂的运动特性进行了分析,最后完成了机器人手臂试验样机的研制,并对其进行了初步的功能试验,验证了Sarrus机构在机器人手臂中应用的合理性,以及基于Sarrus机构的模块化机器人拟人手臂机械结构、控制系统设计的正确性。本文的主要研究内容包括以下几个方面:(1)对Sarrus机构进行基本的理论研究,包括自由度分析,运动学分析,静、动力学分析等。分析验证了Sarrus机构是一种自由度为1的空间机构,可以同时输出旋转运动、直线运动以及这两种运动的组合运动——弯曲运动等结论,为其在机器人手臂中的应用提供理论基础和实验依据。(2)设计了基于Sarrus机构的模块化机器人拟人手臂原理样机,包括其组成模块的设计和不同构型机器人的设计。设计的机器人模块包括Sarrus模块和两种连杆模块;设计的模块化机器人包括Sarrus模块联合体和Sarrus模块混合体两大类。(3)对基于Sarrus机构的模块化机器人拟人手臂的运动特性进行了分析,建立了其运动数学模型和ADAMS虚拟样机模型,得到了其有效工作空间和控制策略,证实了该机器人手臂设计思想的合理性。(4)建立了基于Sarrus机构的模块化机器人拟人手臂的原理样机,有效地验证了机器人手臂运动学理论和仿真分析的正确性,Sarrus机构在机器人手臂中应用和该手臂设计方案的可行性与有效性,以及基于Sarrus机构的模块化机器人拟人手臂机械结构和控制系统设计的正确性。更多还原

【Abstract】 Modular robotic arms of multitudinous types have been employed in many fields, such as manufacturing, automation, service, military and so on. Traditional modular robotic arms are mostly composed of joint modules and link modules. There are three types of one-DOF joint modules: pivot joint module, rotational joint module and prism joint module. Link modules are fixed, which have no independent driving equipments. Modules that are able to act as both joints and links are employed in modular robotic arms to improve their versatility and flexibility.A novel modular robotic arm based on the Sarrus linkage is proposed in the thesis, in accordance with the needs of the development of modular robotic arm. As the Sarrus linkage is able to transfer motions and connect two adjacent modules, its application in robotic arms can widen their workspace and strengthen their flexibility. In this paper, the kinematics characters of the Sarrus linkage is first studied; then, the mathematic model of the robotic arm is built, and its kinematics features are also analysized, with both theoretical and simulation methods; at last, the experimental model of the arm is made up. The results demonstrated the rationality of employing the Sarrus linkage in robotic arm, and testified the validity of the design of the mechanical structure and control system of the modular robotic arm.The main contents of the thesis are as follows:(1)Basic theoretical study of the Sarrus linkage was made, including its DOF, kinematics, dynamics and so on. The analysis comes to the conclusions that the Sarrus linkage is a 1 DOF spatial mechanism, and it is able to export rotational motion, translational motion and winding motion—the combination of the former two motions. This section is the preparation for the application of the Sarrus linkage in robotic arms.(2)The models of modular robotic arms based on the Sarrus linkage are designed, including robotic modules and robots of different configurations. The robots are composed of the Sarrus module and two kinds of link modules, and they can be divided into two types: robots composed of only the Sarrus modules and robots composed of different modules.(3)The kinematics characters of the modular robotic arm based on the Sarrus linkage are studied, and the mathematical and simulation model of the arm are also built. The analysis comes to the conclusion that the idea of designing robotic arms of this kind is reasonable and advisable.(4)The experimental model of the modular robotic arm based on the Sarrus linkage is built up, and the conclusions of the experiment demonstrated that the former theoretical and simulation study of the robotic arm was correct, they also proved the idea of employing the Sarrus linkage in robotic arms was reasonable, as well as the design of the mechanical structure and control system of the modular robotic anthropopathic arm based on the Sarrus linkage.更多还原