| As people continue to explore the moon,the damage of lunar dust to lunar exploration equipment has become more and more prominent.At present,people have proposed some lunar dust removal methods such as fluid dust removal,mechanical dust removal,and dust removal based on electric field force.The photoelectric lunar dust removal technique based on the abnormal photo-voltaic effect of ferroelectric ceramic lanthanum modified zirconate titanate(PLZT),has many advantages,such as fast response speed,high output voltage and large dust removal area and therefore very valuable for research.In order to improve the dust removal efficiency of photoelectric lunar dust removal technique and expand its application range to dust removal surface,this paper carried out research on the design and parameter optimization of dust removal electrode configuration,including the following aspects:The working principle of the dust removal system and the configuration of the dust removal electrode were analyzed.According to the composition of the photoelectric lunar dust removal system and the dust removal principle,the internal relationship between the main parameters such as light intensity,surface area of the dust removal electrode,number of PLZT and size of the concentrator is analyzed theoretically;The mathematical model of the dust-removing electric field intensity of the photo-electrostatic field was established.The influence of the area of the conductor of a single PLZT-driven dust-removing electrode on the dust removal effect under different conditions was analyzed.In order to adapt the dust removal work of complex dust-removing surface,the design and manufacturing method of flexible dust-removing electrode were proposed,and its superiority was verified by curved surface dust removal experiment.The parameters were optimized for the configuration of the comb-shaped dust-removing electrode.In order to improve the driving ability of a single piece of PLZT and the uniformity of the distribution of the dust-removing electric field,the configuration of the comb-shaped dust-removing electrode is proposed by the edge effect of the charge,and its superiority is proved by experiments.To optimize the electrode size and its parameters,the mathematical model of the field strength distribution of the comb-shaped electrode was established based on the moment method.The influence of the tooth width and the gap width on the strength of the dust-removing electric field was obtained.The correctness of the mathematical model is verified by comparing the calculation results of the mathematical model and COMSOL Multiphysics.The influence of the material of the insulating film of the comb-shaped electrode and the thickness of the copper foil on the dust removal efficiency was analyzed.Guided by the simulation results,through the dust removal comparison experiment of the comb-shaped electrodes with different configuration parameters,the comb-shaped electrode configuration parameters which make the driving ability of a single piece of PLZT relatively optimal within the allowable range of the manufacturing process are obtained,and the dust r emoval efficiency is doubled,and the particle size range of the lunar dust that can be removed by the comb-shaped electrode is obtained.Coplanar bipolar electrodes and needle electrodes were studied.To further expand the application range of the photoelectric lunar dust removal system,the coplanar bipolar electrode and the needle electrode were studied.Through the establishment of a simulation model of coplanar bipolar electrode,theoretically analyzed the scope of application of dust removal and its i nfluencing factors;The effects of dust-removed surface material,electrode area,lunar dust particle size and multi-chip PLZT parallel drive on coplanar bipolar electrode dust removal method were verified by experiment.For the needle electrode,the simul ation of the dust removal electric field is carried out by COMSOL Multiphysics to reveal its working principle;The interaction between light intensity,electrode type and dust removal speed were analyzed based on experimental method Theoretical analysis a nd experimental verification of the suitable electrode types for different sizes of trenches were carried out.The coplanar bipolar lunar dust removal system was studied experimentally.For the purpose of verifying the dynamic dust removal of coplanar bipo lar electrodes and proving the feasibility of autonomous lunar dust removal,double tracked dust removal mechanism based on coplanar bipolar electrode was designed.The influence of light intensity,number of PLZT parallel drives and mechanism running speed on the dynamic dust removal effect of the dust removal mechanism was explored by means of experiment.Finally,the variable speed dust removal control scheme was designed and used to carry out the lunar dust autonomous removal test on the dust-removed surface.The uncleaned lunar dust was magnified,and the reasons for the incomplete removal by this method were analyzed to point out the improvement of the dust removal mechanism. |
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