Experimentation on Identifying the Kinematic Parameters of Serial Mechanism Based on the Product-of-Exponential Formula
HE Ruibo1, ZHAO Yingjun1, HAN Fengling2, YANG Shunian1, YANG Shuzi1
1. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
何锐波, 赵英俊, 韩奉林, 杨曙年, 杨叔子. 基于指数积公式的串联机构运动学参数辨识实验[J]. 机器人, 2011, 33(1): 35-39,45..
HE Ruibo, ZHAO Yingjun, HAN Fengling, YANG Shunian, YANG Shuzi. Experimentation on Identifying the Kinematic Parameters of Serial Mechanism Based on the Product-of-Exponential Formula. ROBOT, 2011, 33(1): 35-39,45..
Abstract：The product-of-exponential(POE) formula is introduced into the kinematic parameter identification based on joint trajectories for serial mechanism.Each joint trajectory is measured by CMM (coordinate measurement machine).Then, equations describing each joint trajectory can be obtained by processing the measurement data.According to the definition of the revolute joint and the prismatic joint in POE formula's convention,the actual twists and actual pulse-count equivalents of joint variables can be obtained directly from these equations without the complicated procedures of the link coordinate frames' construction and these coordinate transformation matrixes' reconstruction.The method is implemented to identify the kinematic parameters of the digital brain stereotactic apparatus.The experimental result shows that the method is effective and can be applied to the kinematic calibration of the general serial mechanism.
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