Study On The Airbag Landing Buffer Device Of Mars Rover And Its Cushioning Characteristics

With the improvement of deep space detection technology,countries have enacted a new Mars exploration program,all will be used by the way of detection of the flyby,orbit,a hard landing for steering can realize payloads safely,then using the carrying detection equipment,to develop mobile patrol detection,star soil samples and the way of submersible in situ detection of a soft landing.Among the many means to realize soft landing,buffer airbag has excellent cushioning performance,low cost,light weight,simple structure,easy to fold,recyclable and reusable,which has become a new research hotspot.Application background,based on Mars landing on Mars in the process of the soft landing a big rebound,and the problem of impact overload airbag buffer way more,it is proposed to design a aims to improve the safety of the landing buffer device,through the design,the combination of theoretical modeling and dynamic simulation research method,the airbag system in the process of its landing buffer buffering characteristics were analyzed,and the buffering device for the Mars reconnaissance orbiter airbag provided a reference for design.First of all,based on the research of previous Mars activities,planning and design of the Mars reconnaissance orbiter general structure and the working process,on this basis,the selected six airbags buffer airbag system configuration mode,aiming at the landing buffer process,energy equation,the adiabatic compression and exhaust release can process the parameterized model and airbag unit much appearance is parameterized model,determine the various factors influencing the airbag buffer buffering performance system.Second,the airbag system adopted by the theoretical basis of the finite element simulation,control volume method is introduced in detail,and based on this theory was established in the literature capsule double-buffering airbag model,finite element simulation of the landing buffer process,experiment and the simulation results compared with the literature,and verified in this paper,we study the landing buffer process adopted by the reliability of finite element simulation method,then set up in this paper,using the finite element mesh model of airbag system key parameters Settings.Finally,through the finite element model of this paper set up the buffering process simulation,analyzed the exhaust time,vent area,the quality of air outside the initial internal pressure,load,and at the end of the landing speed etc.Typical factors affect the performance of airbag system buffer,get inside and outside load overload,load speed and air pressure,volume,internal energy curve,summed up the factors that affect device movement and physical characteristics of airbag.Based on the analysis of the simulation results,the all-factor method is adopted to optimize the parameters of three key factors affecting the buffering performance within the defined range,with the load overload peak and the ground height of the underside as the constraint conditions and the initial rebound peak speed as the goal.A set of optimal design parameters that can meet the requirements is selected,based on which the landing buffering process is simulated by finite element method,and compared with the non-exhaust condition,it is concluded that the buffering efficiency of the airbag system is significantly improved after the optimization of parameters.