【作者】 周安明；

【导师】 于萍；

【作者基本信息】 吉林大学 ， 机械电子工程， 2009， 硕士

【摘要】 本文根据长春瑞星机器人科技有限公司要求,依照人体肌肉的工作原理,设计了一种新型关节液压驱动元件,以实现机械手工作的柔性化,此关节液压驱动元件在一定液压作用下能产生相应的弯曲变形。建立了相应的静态模型,通过实验论证了该模型的合理性。利用悬臂梁理论,建立了该驱动元件的动态模型。根据运动解剖学,设计了腕部带自锁能力的球副型全方位机械手,并用CATIA建立相应的三维模型,通过对模型的电子样机运动仿真,得出相应腕关节运动和手指抓取的仿真参数,对机械手模型的结构进行了优化。基于人手腕的运动规律,设计了由关节液压驱动元件并联构成的手腕驱动环,对手指的驱动采用驱动元件并联、再串联的驱动链形式。建立了三关节手指的数学模型,根据能量最小原则,应用Hopfield网络求得了机械手指的一个逆运动学解。对单个关节液压驱动元件,进行了伺服控制系统的设计,通过模糊控制算法对位置控制环进行力补偿。同时,运用神经网络对模糊控制算法的输入变换参数进行在线调节,使其对不同的刚度环境具有自适应性。仿真结果表明,该算法能够实现很好的力跟踪。更多还原

【Abstract】 With the development of industrial modernization, flexible manipulator because of its advantage of flexible manufacturing has been more and more widely. Among them, the flexible joints manipulator component is the key to affect the movement of the flexible manipulator joint research of great significance. Therefore this article in accordance with the principle of human muscle, a new joint hydraulic drive components, the use of parallel or series of the components comprising the drive device, combined with a certain degree of mechanical structure, can be flexible manipulator of the work, and the joint drive the form of a decision of the manipulator has a strong anti-interference and control.This joint hydraulic drive components under a certain hydraulic pressure to produce the corresponding bending deformation. The analysis of the radial deformation and axial deformation at the same time, set up a static model, and experimental verification of the model is reasonable. Using cantilever beam theory, the dynamic model-driven components. MATLAB simulation results show that by choosing the structure of reasonable parameters, this component can have a very good dynamic properties.According to Sports Anatomy, designed with self-locking ability of the wrist of the ball, vice-type omni-directional robot, the robot fingers institutions using three fingers, each finger has three joints and three knuckle, joint use of hinged form, the aim of to adapt to a variety of end crawl. CATIA with the corresponding three-dimensional model of a prototype model of the electronic motion simulation, draw the corresponding wrist movement and finger crawling simulation parameters, indicating that the structural design of the robot’s reasonable and practical. At the same time, in order to facilitate the installation of the drive components and other accessories, the model of the structure of manipulator optimized.Based on the movement of the wrist, design-driven by hydraulic joints consisting of components in parallel wrist drive ring, and an analysis of the loop device driver work. The results showed that the direction of the device to achieve bending and rotation, and has a certain anti-interference (stability); on the use of finger-driven components of the drive in parallel, and then the form of series of drive chain. Form in accordance with its campaign to develop a cycle of work processes, and introduced in the process of meeting the conditions of torque. This will enable the work of your fingers and the relationship between the moment a more standardized; subsequently, the establishment of a three-joint finger mathematical model can be seen from the mathematical model, its inverse kinematics is uncertain. According to the principle of energy minimization, the application of Hopfield network to achieve a mechanical finger inverse kinematics solution.In robot control, the first joint of a single hydraulic drive components, a servo control system design, and described the characteristics of control valves throughout the system. Through the fuzzy control algorithm of position control loop to force compensation. At the same time, the use of neural network fuzzy control algorithm to transform the parameters of the input-line adjustments to the stiffness of different self-adaptive environment. Simulation results show that the algorithm can achieve very good tracking ability.In some occasions for manipulator force raised by the special requirements of this paper, a stiffness to adapt to different environment, adaptive power control points based on neural network with link control algorithms. The simulation results prove the rationality of the algorithm.Finally, the results of this study, we can see that the use of hydraulic drive component design joints flexible three-finger manipulator are theoretically and technically feasible. In robot technology has broad applications in space. Since time is limited, the subject of study is flexible mechanical wrists and flexible mechanical fingers. Hydraulic components for the joint in the other joints have yet to be further applications for in-depth research. Follow-up studies may include: a manual for the model, the hydraulic drive components with joint design of artificial joints more than one hand. Through effective intelligence algorithms, to truly "smart"; fingers the work of analysis, the components of the output torque in a variable period of time increase or reduce them, and the changes in the law as well as the inter-relationships have yet to be through experiments and simulation analysis in order to achieve the best possible working condition; also can use the kinematic simulation has come to the inverse kinematics solution; virtual robot and virtual objects as the user interaction between the embodiment can be used in Virtual other research, such as real-time virtual assembly manually; considered minor components of joint design of a hydraulic-driven precision micro-manipulator to be used for small, precision parts, or crawling robot for medical surgery; Taking into account the hydraulic drive components such flexible joints large, can be widely used in agricultural robots, to achieve vegetables, fruits, non-destructive harvesting.更多还原