Zero calibration and performance assessment of a 6-DOF parallel platform used for wave simulation.

Aiming at the problem that parallel robot exists the lack of movement precision, the zero calibration and performance assessment for a 6-DOF parallel platform used for wave simulation were completed. The inverse kinematics was acquired by using homogeneous coordinates method so as to establish the motion control model of the platform, and the workspace of certain posture was obtained by using boundary search method based on inverse kinematics. The motion control of the platform was realized, the design of control system was done by choosing PC and motion controller as the control mode. The motion performance was improved, vector derivation method was adopted to build the zero point error model,and zero calibration was implemented with the help of laser tracker. Finally, the platform was used to simulate a certain wave spectrum and the tracking performance was analyzed according to the experimental results. The results indicate that the calibrated platform has a good simulation performance. [ABSTRACT FROM AUTHOR]