| Shipborne helicopters are an important means of maritime military force deployment and maritime search and rescue.Countries attach great importance to the development of shipborne helicopters.Wind tunnel test is an indispensable link in the development of ship-borne helicopter.During the test process,the ship-borne helicopter should be equipped with a special pose adjustment test platform to control and control its space position and attitude.The position and pose adjustment test platform directly affects the reliability of the test results.The existing wind tunnel support device can only meet the test of general functions,and can not obtain the comprehensive and detailed aerodynamic parameters of shipboard helicopter.In this paper,a set of high precision,high reliability and high stability pose adjustment test platform is developed,which can be used to control a shipborne helicopter to complete take-off,landing and hovering actions on a warship platform under the simulated sea wave scene.In this paper,in order to satisfy the demand of ship-borne helicopter offshore wind tunnel test,combined with the specific test,analysis of the shipboard helicopter posture adjusting the composition and working principle of test platform,according to the existing test scenarios to determine scheme,design a set of can realize accurate position control platform,the specific research work:Firstly,starting with the functional requirements of the system and according to the test performance indexes,a 6-DOF test platform for position and pose adjustment of shipborne helicopter was proposed,and the motion model and driving mode of the mechanism were determined.The structure design of the posture adjustment test platform for shipborne helicopter is completed,which mainly includes the design of the pitching mechanism,yaw mechanism and roll mechanism,so that it can realize the 6-DOF coordinated movement,and better meet the needs of the more complex attitude changes of shipborne helicopter in the test process.Secondly,using Solid Works to complete three-dimensional modeling,the statics analysis of the whole mechanism and important parts of the shipborne helicopter pose adjustment test platform was carried out,and the forward and inverse kinematics solutions of the device model were obtained based on D-H model parameters.Write a driver using MATLAB and Adams software function of this mechanism kinematics simulation,obtain shipboard helicopter posture adjustment test platform drift mechanism and actuator at the end of the trajectory,based on the domain of working Monte Carlo method is used to solve the,the results show that the developed by ship-borne helicopter posture adjustment test platform meet the test requirements on the function,working space is large,excellent performance.Finally,study the quality optimization problem of the whole platform,carry out the lightweight design on the basis of the design meeting the test function requirements to further ensure the safety of the test.The operation precision and operation stability of the ship-borne helicopter pose adjustment test platform were tested.Finally,in the wind tunnel test section with wind speed of 20m/s and shipborne helicopter speed of 4000r/min,the take-off,landing and hovering movements of the ship deck of the rotorcraft were completed,and the vibration test of the device was completed under the working state.The experimental results show that the shipborne helicopter pose adjustment experimental platform developed in this paper has good performance and can meet the experimental requirements to the greatest extent. |
