Research And Realization Of Six-Dimensional Parallel Test System For Outboard Engine Fuel Tank

With the development of offshore aquaculture and tourism,ships equipped with outboard engines have begun to be widely used.Among them,the fuel tank of the outboard engine,which is an important part of the outboard engine,is inseparable from the actual sea test,whether it is the acquisition of design parameters or the test of product performance.However,there are hidden safety hazards in conducting sea trials.Once fuel leakage occurs,it is very easy to cause damage to ships,personal injuries,and pollution of water resources.In order to solve the above-mentioned problems,this article aims to develop a system that can perform marine simulation tests on the fuel tank of outboard engines in a laboratory environment.Through the study of the motion law of ships equipped with outboard engine fuel tanks in the second-level wind conditions at sea,the motion samples of rolling,pitching and heaving when navigating in coastal areas of my country are obtained.In order to accurately reproduce the ship’s motion state,this paper constructs a test platform for the test system based on a six-dimensional parallel mechanism,analyzes its kinematics,and establishes its position inverse solution formula.According to the motion samples,kinematics theory and the weight of the fuel tank of the outboard engine,the design parameters of the six-dimensional parallel test platform were determined.At the same time,the design,selection and verification of the fuel tank tooling fixture of the outboard engine,the upper platform and the electric cylinder of the six-dimensional parallel test platform were carried out.In order to improve the motion control accuracy of the six-dimensional parallel test system for the fuel tank of the outboard engine,this paper designs a control scheme based on a compound PID motion controller,and analyzes its performance through simulation software.At the same time,the design and selection of system motion control hardware and testing equipment,as well as the development of the test system man-machine interface are carried out.Finally,the basic performance and motion simulation performance of the six-dimensional parallel test platform for the fuel tank of the outboard engine,the tooling fixture of the fuel tank of the outboard engine,and the testing equipment were tested.At the same time,the test system was used to carry out actual simulation tests on the safety performance of the fuel tank of the outboard engine,such as dynamic ventilation capability,and the test results met the performance index requirements of the test system.