Study Of Three-Degree-Freedom Heavy Swaying Test Platform Based On Virtual Prototyping Technology

Three-degree-freedom heavy swaying test platform is a typical electromechanical equipment, which is integrated with machine, hydraulic technology and control technology. It includes three degrees of freedom, the rotation around axis X, the rotation around axis Y and the rotation around axis Z. The characteristics of big size and heavy load are affect design and control of machine, thus which affect working performance and test precision. Swaying test platform, as a space motion mechanical device, can simulate motion of ship, vehicle, space craft, gyro and so on.In order to optimize the swaying platform, this paper mainly refers to the rigid-flexible coupled simulation, optimization of the spider and the parametric analysis of hydraulic cylinders,At first, using the flexible body theory, this paper changes both key parts of spider and wire race bearing into flexible bodies. After building the rigid-flexible coupled platform model, with the effect of the flexible bodies, the reliable simulation can be done. Based on this simulation, it conclude the difference between rigid body and flexible body, and also supplied necessary dynamic load for spider's dynamic analysis and optimization.Using dynamic load that applied by the simulation above, the dynamic analysis and lighten-weight optimization of spider were done. Getting stress history supplied testing data for its service life analysis.Parametric design is very effective and useful in CAD technology area. With parametric design theory, cylinder models can be parametrically designed in ADAMS, the positions of which can change continuously,then the suitable cylinder position was selected according to the simulation results. At last, with comparing optimized platform and primary platform, the feasibility and validity were then conformed.