Engineering Design And Study Of 3-DOF Parallel Motion Platform

Under laboratorial environment, 3-DOF parallel Motion Platform is a empirical equipment that simulates vibration warship and movement of the warship on the water surface, it can accomplish carrier plane illuminated guidance performance test of the system. The 3-DOF paralleled motion platform in the topic can simulate horizontal rolling, vertical rolling and ascending and descending of the warship on the water surface, it is important use value to the development of carrier plane illuminated landing equipment and illuminated guidance emulation equipment of the system.3-DOF parallel Motion Platform studied in the topic is a product that integrated mechanical, electronic and hydraulic technology. It involves many knowledge fields, such as mechanism, kinematics, kinetics and control system etc. The paper mainly accomplished the design of mechanical entity and hydraulic servo system and established mathematical model of servo control system, emulated and studied the system.First, according to the performance index of the system, designs the mechanical entity and analyses the forward and backward solution about its motion pose and position. It is not only the basic task of analysis of machine motion, but also the basis of speed, acceleration, the analysis of mechanics, the analysis of deviation, the analysis of space, the analysis of kinetics and mechanism integration of the machine.Secondly , the paper accomplishes the contrail layout and generating about the motion platform, compute its max speed and acceleration in the course of motion. According to the motion index of the platform, the models of electro-hydraulic servo valve, constant force variable pump, servo pneumatic cylinder, displacement sensor etc are selected, the simplified schematic and installation drawing of hydraulic system of motion platform.Finally , the mathematical model of pneumatic cylinder , electro-hydraulic servo valve, displacement sensor are established, the transfer function of the system is gained. The author does some simulation analysis about the system with disturbance and without disturbance. Because the system need not control accuracy of the system, the author applies PID emendation, gains more satisfactory electro-hydraulic position servo control system.