Research On The Influence Of Satellite Vibration On Acquisition Probability Of Optical Communication System

In this paper,the influence of vibration on the capture probability of satellite platform is analyzed and studied.The beaconless spatial acquisition algorithm investigated in this paper allows designing a laser communication terminal without a dedicated optical beacon.According to the current literature research shows that satellite scanning process,the satellite platform vibration is to determine the point,acquisition and tracking process is an important reason for stability.In this paper,we propose a new method to capture the probability of occurrence of vibration after small satellite scanning and capture in the vibration environment of small satellites.In this paper,And the simulation of this formula to verify its correctness,which is the first time for small satellite platform vibration on the capture probability of modeling and analysis.The specific work is as follows:Firstly,the development process of satellite optical communication is introduced,and the research status of satellite platform vibration is studied.This paper introduces the satellite space acquisition theory and single field scanning acquisition scheme,and makes an analysis on the existing probability estimation formula.Secondly,the theoretical model of the capture scan is established under the random vibration environment of the satellite.Based on the characteristics of the satellite platform,the azimuth pitch(?h,?v)coordinate system is established under the random vibration of the satellite platform during the scanning and capturing process.The probability distributions of the assumed random vibrations in the two angular directions obey the independent Gaussian distribution.Considering the completeness of intensive vibration,it is also be produced although it is unrealistic.Regardless of the receiving portion,the criteria for obtaining success in this paper is the intensity level defined at the given moment towards the direction of the counter terminal.Comparing the probability of capture in the past,the probability of capture after the vibration is more specific.Finally,the theoretical simulation analysis is carried out in the computer environment by the relationship between the capture probability and the vibration level.The receiver's position,the beam angle,the scanning pitch ratio are be considered.From the simulation of the graph can be drawn in the uncertain area with the vibration level increases the probability of capture will have different trends,but finally,it tends to balance.In the fourth chapter,the Monte Carlo simulation analysis of the simulation graph of Chapter 3 further proves the correctness of the formulas.And the probability of acquisition tends to 1 when the vibration tends to zero by the formula.The probability of capture for a large level of vibration is deduced in the fourth chapter and compared with the formula derived from Chapter 3 to find that the estimated probability of capture is credible.Compared with the analysis of the probability of trapping after the vibration,the paper designs a more effective scheme for the probability analysis of the platform after the vibration,and analyzes the influence of the small satellite scanning vibration in China for the first time.