Research On Photovlatic Lunar Dust Removal Technique For Luanr Exploration Instruments Based On PLZT

Scanning our history of the human exploration of the moon,the lunar exploration mission has always been troubled by the issues caused by lunar dust,especially our manned spaceflight mission is launching into a crucial step along the lunar exploration program.Therefore,in order to ensure the reliable operation of the selenographic detector system,the problems caused by lunar dust are obliged to be taken good care.However,the traditional dust removal methods are hard to make in good use in the lunar environment.At present,the most popular electro dust removal technology is the eletrodynamic dust field based on the electric curtain concept,which is also limited by the mension of surface area and large energy consumption.Therefore,this topic will use the excellent photoelectric characteristic of the lanthanum modified lead zirconate titanate(PLZT),applies the thousands of photovoltage,which is motivated by ultraviolet light,to the dedusted surface.The lunar will be repelled by using the electrostatic adsorption property.This paper will build a photovoltaic dust removal system based on PLZT,and study on the active photovoltaic lunar dust removal technique,mainly including the following aspects:The photovaltic lunar dust removal principle is proposed,and the mathematical model of photovoltage output of dust removal system according to the PLZT photovaltic characteristic.The sufferance forces of lunar dust grains have been analyzed in the process of dust removal.The mathematical model of electric field intensity is constructed,and its influencing factors have been proposed and discussed through the experiments of which results will provide fits to data.The results will verify the correctness of the mathematical model and lay a theoretical foundation for optimizing the configuration of plate-typed dust removal collectors(LDCs).In order to solve the problem of particles which will hop repetitively between the protected surface and the LDC during the process of dust removal,a novel configuration of LDC which will be covered with an insulting film is proposed.A high-speed camera is set to observe the whole process of lunar dust removal from the microscopic level,which will verify the feasibility of a new configuration design of the LDC.In order to magnify the area of the LDC,the schemes of multi-pieces PLZT connected in parallel and multi-pieces lunar dust collectors connected with PLZT respectively have been presented according to the influencing factors of electrical field intensity.The feasible scheme is obtained through experimental comparison and analysis.Finally,to combine the novel configuration of LDC covered by an insulting film and the multi-pieces lunar dust collectors connected with PLZT respectively,the feasibility of the optimal design of the LDC will be verified from two aspects of measuring the dust removal voltage and mass.Considering the lunar extremely high and low temperature,the photovaltic output characteristics of PLZT affected by multi energy field coupling are analyzed.Combining with the physical temperature distribution of lunar surface,two aspects of working and non working state of PLZT are considered to analyze the photovaltic output changes of PLZT under the influence of more harsh condition than the extreme high and low temperature of lunar surface through experiments,which provides novelty ideas for further research The difference dust removal efficiency between the vacuum and terrestrial conditions are compared and analyzed by using the evacuated enclosure experimental platform.The dust removal efficiency of different particle sizes are tested by experiments based on the forces of dust grains in the removal process,and the range of dust particle size applicable to this photovaltic dust removal technology is obtained.The trajectories of particles are captured to find out the relation between the particle size and its charge.Finally,the dynamic dust removal experiment is carried out to obtain the most appropriate speed of the dust removal collector when the dust removal efficiency is taken as the optimal target.The terrestrial experimental platform of dust removal system is established when the optimal speed of LDC is introduced.The dust removal process of solar panels is simulated to verify the feasibility of active photovaltic dust removal using this photovaltic dust removal technology.