六軸小型關(guān)節(jié)型機(jī)器人設(shè)計、分析和標(biāo)定研究
[Abstract]:As an important carrier of intelligent manufacturing, industrial robot is facing great challenges when the market demand is growing rapidly. with the popularization of automation, more and more enterprises use industrial robot. The ontology design of industrial robot is one of the important contents in the four core research of robot. The kinematic calibration experiment of robot has very important theoretical and practical significance in improving the accuracy of robot at present. The accuracy of industrial robot is divided into absolute positioning accuracy and repeated positioning accuracy. The absolute positioning accuracy of the robot is lower than that of the repeated positioning accuracy, which can not meet the accuracy of the robot in off-line programming mode. The operation of off-line programming of robot is becoming more and more popular, and the absolute positioning accuracy of robot is improved. The method to solve this problem is to calibrate the robot. According to the custom reducer and the customer request, a six-axis small joint type industrial robot is designed. The three-dimensional model of the robot is designed by three-dimensional software solidworks, and then the three-dimensional model is simplified and imported into the ADAMS software through Parasolid format. The prototype of the solid robot is established, the constraints are imposed, the corresponding parameters are defined, the kinematic analysis is carried out by adding the driver, and the displacement and speed at the end are analyzed. The acceleration curve shows that the robot moves smoothly under the corresponding working conditions, the design of the robot body is reasonable, and then the dynamic analysis is carried out, and the torque diagram of each joint is obtained to verify the rationality of motor selection. According to the actual structure of the robot, the kinematic relationship of the connecting rod parameter description mechanism is obtained by DH method, the kinematic model of the robot is established, the kinematic analysis of the robot is carried out, the solution method of the forward solution and the inverse solution of the robot is deduced, the prototype of the robot is established by the software of Robotics tool toolbox of Matlab, and the initial pose and pose of the robot in a certain state are obtained from the input angle. By comparing and verifying the pose of the robot with the same angle on the control panel of the robot, it is verified that the pose parameters of the two states are the same, and the kinematic model of the robot is established correctly. According to the characteristics of industrial robot, some factors affecting the absolute positioning accuracy of robot end are analyzed. The connecting rod coordinate system is established by MDH model method and the error model of robot is established based on differential thought. The error model of robot is programmed by Matlab software, and a set of kinematic parameters and error value of robot theory are given to verify the correctness of robot error model. The calibration experiment of the robot is carried out by the direct measurement method of the coordinate measuring instrument, and the data are obtained from the experiment. The error value of the kinematic parameters of the robot is identified by the method of parameter identification matrix and compensated in the robot controller. Then the compensated end pose is measured and compared, and the absolute positioning accuracy of the robot is improved from the data comparison diagram.
【學(xué)位授予單位】:揚(yáng)州大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TP242
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