Study On Impact Penetrator For Lunar

With the continuous development of the space industry,the detection activities of stars are becoming more frequent in various countries,and the detection mission has changed from onorbit observation to direct detection.In order to obtain the evolution process of the stars and the physical information of the stars,it is necessary to use drilling equipment to drill holes to send the detection equipment into shallow soil,which is a key task for direct detection of the planet.General rotary drilling equipment is limited by the existing carrying technology and it is difficult to achieve a large penetration depth.The impact penetrator(hereinafter referred to as the penetrator)studied in this paper is simple in structure,small in size,light in weight,The advantages of carrying multiple detection devices at the same time have become hotspots for in-situ detection of extraterrestrial objects.This article aims at the difficult points in the research process of the penetrator,and takes the improvement of the penetrating capability of the penetrator as the research goal,and conducts research on the optimization of the internal and external parameters of the penetrator.The internal parameters of the penetrator determine the penetrating ability of the penetrator.In order to optimize the selection of parameters,a relevant dynamic model needs to be established.This paper combines the basic structure of the penetrator,analyzes its energy transmission process and force transmission process,studies its motion behavior in a cycle,and simplifies its interior into a spring-mass system to establish the internal dynamics of the penetrator model.According to the dynamic model established above,a function describing the motion state of each part of the penetrator in a single cycle is established,and the relationship between the internal parameters and the dive distance in a single cycle is established.Using the established function,a suitable optimization algorithm is selected for optimization analysis,and the stability of the optimized parameters is analyzed in combination with the actual use situation.According to the obtained stable optimal solution,the correlation between the parameters and the penetration results is explored.The external parameters of the penetrator affect the penetrating efficiency.The shape of the head cone will directly affect the soil breaking effect and the dive ability of the penetrator.In this paper,by establishing a coordinated head cone mathematical model and according to the principle of limit equilibrium conditions,the correlation between the head cone coordinates and the resistance is established.The optimization method is used to obtain the specific head cone coordinates.The method is compared with other shape head cones to verify the correctness of the results.Finally,combining with the basic principle of injection machine and the parameters obtained above,the design,comparing the impact of two different schemes to determine the final impact way,design of a prototype concrete structure and the physical parameters of some important components,structures,experimental platform,the use of information collection device to get the injection device to verify each part of the single cycle movement behavior as did correlation analysis.