Analysis Of Satellite Structures Dimensional Stability Considering Uncertain Parameters Of Carbon Fiber Honeycomb Panels

With the development of aerospace technology,satellite design is developing in a more reliable and precise direction.Due to the influence of thermal radiation on space orbits,aircraft are often deformed by heat.In order to realize the normal operation of optical instruments,it is necessary to design a satellite structure with "zero expansion" in a certain direction.According to the characteristic that the production process parameters will fluctuate in the interval,the robust design of the satellite structure with carbon fiber honeycomb panels as the main structure has become a key step in the design of "zero expansion" satellites.This paper establishes a simplified version of the satellite external structure model by imitating the GRACE satellite,and explores several parameters in the design parameters that most affect the deformation of the honeycomb panel due to fluctuations through sensitivity analysis and other methods;by using different intelligent optimization algorithms to find more in line with this model Optimal solution;sampling verification through Monte Carlo simulation to obtain a histogram of deformation results and use its statistical indicators to judge stability.In the aspect of sensitivity analysis on the influence of honeycomb panel structure parameters,the experimental design method is used to study the maximum deformation contribution rate of the satellite.According to investigations and combining with the specific situation of this subject,the design of experiments is carried out using the method of orthogonal arrays,and those parameters with high contribution are obtained through the experiment design.In the optimization stage,construct multi-objective functions with different thermal fields as the objective functions,and use genetic algorithms,adaptive simulation repetition algorithms,and particle swarm optimization to optimize conversion.Among them,compare the advantages and disadvantages of the solution under the method,and get the applicability of the algorithm under the model.In the stability calculation stage,the results after optimization and optimization are fully rounded,and the rounded values are brought into the Monte Carlo simulation model to obtain the deformation result histogram.After thousands of samplings,a sample index study was conducted,and by comparison,the effects of improving design parameters on stability;the effect of changing adhesive parameters on stability;the use of different optimization algorithms for design solutions on stability influences.