Using a method of algebraic transformation such as power series expansion,it is found that,three crop water production functions,the Jensen mold,Rao model and Stewart model,are transformable mutually,and their water sensitive indices are approximately equivalent.

Based on the vector geometry a kinematics accuracy model of six dof Stewart platform is developed which is applied in the analysis of the newly designed fine tuning stable platform for large radio telescope (LT), with the analytical results also given.

A stable Stewart Platform is designed for large telescope(LT) fine tuning, a mathematical model for kinematics control is gained by coordinate transformation, quasi dynamic analysis is made with Jacobian matrix, and kinematics accuracy results are given, which show that the designed Stewart Platform is effective for the accuracy requirement of LT feed trajectory control.

Posture equation and dynamics reverse solution of Stewart typed parallel machine tools based on D-H transformation matrix

Dynamics analysis of Stewart platform driven by hydraulic considering actuator effection;

Compliant force control analysis of Stewart platform in space docking;

Characteristics analysis of dynamic model of 6-DOF Stewart platform;

Method Studies on Error Modeling and Calibration of the Stewart Platform;

The orientation-singularity expression of the Stewart platform is deduced by using unit quaternion which can avoid singularity when using Euler angles to represent the orientation of rigid body, and then the algorithm of orientation-workspace of the manipulator at a certain position is proposed.

Unit quaternion is used to represent the orientation of rigid body,orientation-singularity expression of the Stewart platform at a given position is deduced,and the singularities caused by Euler angles are avoided.

The actual parameters of Stewart mechanism can be calibrated by means of the measurements of the length of all legs and the relation of the first-order static influence coefficient matrix and Jacobian matrix.

A new measurement method based on the Stewart mechanism was used to measure the positioning of the feed fine-tuning test platform of the five-hundred-meter aperture spherical telescope (FAST).