Kinematic analysis and simulation of a new-type robot with special structure

Abstract

Common methods, such as Denavit-Hartenberg (D-H) method, cannot be simply used in kinematic analysis of special robots with hybrid hinge as it is difficult to obtain the main parameters of this method. Hence, a homogeneous transformation theory is presented to solve this problem. Firstly, the kinematics characteristic of this special structure is analyzed on the basis of the closed-chain theory. In such a theory, closed chains can be transformed to open chains, which makes it easier to analyze this structure. Thus, it will become much easier to establish kinematics equations and get the solutions. Then, the robot model can be built in the Simmechanics (a tool box of MATLAB) with these equation solutions. It is necessary to design a graphical user interface (GUI) for robot simulation. After that, the model robot and real robot will respectively move to some spatial points under the same circumstances. At last, all data of kinematic analysis will be verified based on comparison between data got from simulation and real robot.

Keywords

Mixed hinge structure / Homogeneous transformation / Kinematic analysis / Kinematic simulation