Ergonomic Design Study Of High Overload Projectile Recovery System

With the development of modern intelligent ammunition,the research of high overload projectile test equipment is particularly important.Using ergonomics theory and computer aided ergonomics technology,high overload projectile recovery system was designed and researched,which provide practical reference value for the developing of high overload projectile test equipment and personnel operation.The main research contents are as follows:(1)The design requirements and composition of high overload projectile recovery system were discussed,working principle of the recovery subsystem was proposed,and characteristics of man-machine operation were analyzed.Using Fitts table method and fuzzy analytic hierarchy process,the human machine function allocation of high overload projectile recovery system was researched.(2)In order to simulate the projectile recovery process,the mathematical model was established.Second order MacComark scheme with artificial viscosity and dynamic boundary mesh technique and four-order Runge-Kutta method were applied to program code and numerical simulation.The change of gas pressure in the recovery tube,the acceleration curve of the projectile,and the influence of the test parameters on the projectile motion were analyzed.The simulation results and actual test results were in good agreement,which can provide references for designers and prove the correctness of numerical simulation.(3)Based on man-machine interface design and layout principle and operation principle of usability,the monitoring operation panel,control counter and recovery test equipment were designed.Using by 3D software and Jack software,the operation efficiency of the test equipment was analyzed.According to the process of projectile dismounting,handling and loading,a risk model of human injury was established and the operation efficiency of projectile was discussed.Multifunction car was designed,which reduce the burden of personnel and improve test efficiency&safety.(4)Using the fault tree analysis method to analyze the personnel operating errors and test equipment fault,fault tree model was established.Using Monte Carlo simulation to calculate the reliability of personnel operation in test process,the pattern importance on the components of the hydraulic and pneumatic test equipment was analyzed.The reliability of maintenance and non-maintenance in hydraulic and pneumatic test equipment was discussed.According to the two types of hazard theory,dangerous source of high overload test was classified and identified.According to the theory of track crossing,the corresponding safety measures were put forward,which improve the security of the test process and ensure the safety of the test personnel.Ergonomics theory and design principles were applied to high overload test equipment in first time,which provides an important guiding significance to research the ergonomic design for testing equipment and has offered foundation for further study,accords with tendency of society development.The safety,reliability,high efficiency and economic of recovery system was improved.