Structural Design And Analysis Of A Man-portable Device

The individual carrying device refers to all equipment used by individual soldiers to carry weapons,equipment and daily necessities.In order to solve the problem of the last kilometer of the shells,a multi-functional carrying device is designed.In order to study the performance of the self-designed portable device,this paper designs the portable device control system,constructs the portable device and the dynamic model and finite element model of the random road surface,from the analysis of the vibration characteristics of the portable device,the analysis of the human waist force and the structure Feasibility verification in terms of rigidity and strength.The overall design of a single-soldier carrying device is carried out,considering the design concept of ergonomics,and the designed carrying device should have a high degree of coordination with people.The four-wheel walking mechanism is selected according to the performance index,and the size of the entire carrying device is designed according to the main body parameters of adult males in my country.The design and selection of the load-bearing device,traction mechanism and power device of the carrying device are carried out.The main components such as the wheels,damping mechanism,load-bearing plate,frame and traction mechanism are modeled using three-dimensional software,and the springs are finally calculated.The diameter and effective number of turns.The control system of the portable device is design.Build the physical platform of the car body system,configure and build the hardware modules,design the drive control and use the classic PID control algorithm in the Simulink control platform to carry out modeling and simulation experiments,according to the core idea of ergonomics,to ensure that the carrying device is following The comfort of the person is good when he moves forward.Using multi-body system dynamics,the vibration damping characteristics and comfort of the carrying device are studied.With the help of Recur Dyn,the dynamic model of the three-dimensional random road and the carrying device is constructed,and the control platform is built in Simulink software to control the two rear-wheel drives of the device in real time to realize the human-vehicle-road coupling.Analyze the vibration of the carrying device and the force on the waist under different road surfaces,vehicle speeds and loads.The results show that the portable device has a better vibration damping function,and the person and the portable device have better comfort when moving.The structural rigidity and modal characteristics of the portable device are studied.Using ANSYS to build a finite element model of the carrying device,the stress distribution and dynamic characteristics of the carrying device are calculated and analyzed,and the modal analysis and harmonic response analysis on the carrying device during movement.The analysis results show that the structure of the carrying device is reasonable in design,the stress distribution is balanced when loaded,and there is no harmful low-frequency mode.Under the excitation of the C-level pavement load spectrum,the structure still has a considerable safety margin,and at the same time,the structure has a relatively high level of safety.High fatigue life.The correctness of the vibration analysis model is preliminarily verified through modal experiments.