Research On Parallel Auxiliary Swing Test-bed

With the further development of China's shipbuilding industry and the increasingly improvement of requirements for performance of auxiliary ships, the swing test-bed for simulating movement at sea comes into being, in order to make enterprises save costs in the process of marine equipment R & D and shorten the development cycle of products. The thesis will be designing a new swing bed with 3-DOF(degree of freedom) and high-torque dynamic load. The swing bed will be used for the simulation of the three movements of ship-roll, pitch and heave under certain sea conditions, then validating the tested equipment under certain sea conditions.The thesis, firstly, is based on performance index of system to design the reasonable mechanical structure and makes use of SolidWorks to construct a model of swing bed. The feasibility of structural design is verified by simulation. And then in terms of the feature of high-torque load, the new method of intermediate standing pillar stress is proposed and ANSYS software has been applied into the upper platform of swing bed for reliability analysis and calculation.Secondly, according to the electrohydraulic proportional closed-loop control principle completes the design of systematic hydraulic principle diagram, the selection and checking of key hydraulic components, and paints electrical controlling principle diagram of hydraulic pump station. Besides, the thesis introduces the basic parameters of selection and check, and calculates and selects accumulator group of intermediate standing pillar and the accumulator on the hydraulic cylinder. The AMESim simulation software has been applied into the hydraulic simulation of each single hydraulic cylinder. The result of simulation is verified the reliability and feasibility of hydraulic cylinder.Finally, the hardware and software systems are designed. The classic PID control algortithm has been adopted in three-channel servo controller. And the thesis introduces the control principle of the controller, complies a friendly human-machine interface by using Delphi7.0 platform, analyses the possibility of failure of the system, and puts forward the fault solutions, in order to make the operation system more intuitive, concise and convenient when the users operating the system.