Mechanical environment prediction method of lunar probe soft landing impact

Abstract

The invention relates to a mechanical environment prediction method of lunar probe soft landing impact, and belongs to the technical field of deep space exploration. According to the method, a non-linear finite element model of probe lunar surface soft landing is established, model reduction is conducted on a probe according to the generalized dynamic condensation method, and therefore the purpose of improving the solving efficiency is achieved; then, non-linear finite element solving is conducted on the reduced model to obtain a dynamic response of the structure of the probe; after an acceleration speed response at a concerted position is obtained, the shock spectrum of the acceleration speed response of the structure is calculated according to a recursion digital filtering method, wherein the shock spectrum is used for describing the dynamic environment of probe landing impact; at last, a maximum expected environment is obtained by the adoption of a spectrum enveloping method, wherein the maximum expected environment is used for setting the designing and testing conditions of equipment. By means of the mechanical environment prediction method, the solving efficiency is improved and the product designing period is shortened.

Description

technical field [0001] The invention relates to a method for predicting the impact mechanical environment of a lunar probe soft landing, and belongs to the technical field of deep space exploration. Background technique [0002] In order to realize the mission of soft landing on the lunar surface, the lunar probe system will go through two major processes: the flight and landing process and the working process on the lunar surface. According to the current research results, there is basically no geological activity on the moon, so after a safe landing, there is no typical mechanical environment except for a small amount of disturbance caused by the movement of various mechanisms of the probe system. Therefore, the main mechanical environment of the detector system is reflected in the flight and landing process. The flight and landing process can be divided into four parts: the launch stage of the carrier rocket, the transfer stage of the earth to the moon, the circle of the...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the impact response of the payload of the probe cannot be truly reflected, and propose a method for predicting the impact mechanics environment of the soft landing of the lunar probe based on nonlinear finite element analysis, which is suitable for the design stage of the probe scheme

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