The Research Of Assessing The Performance Of Flight Control System

Given the importance of the flight control system, and because of the use ofadvanced flight control system and the complexity of the technology, ensuring thereliability and correctness of the flight control system is the key to ensure flight safety.Verification and validation of advanced technology are an effective way to improve theefficiency and reliability of aircraft development.First in this paper flight control systems are briefly introduced. Then this paper givesthe specific implementation steps of AHP (Analytic Hierarchy Process), as well as to theprocedure of determining the consistency of adjustment; established evaluation controlsystem criteria of XXX aircraft. Using subjective Law and objective weighting method tocalculate the appropriate weights for each indicator index system; finally select theappropriate response function for each indicator. An assessment instance of theperformance of LQR (Linear Quadratic Regulator), INA (Inverse Nyquist Array) andQFT (Quantitative Feedback Theory) controllers is given. It show that the evaluationresults and theoretical are matched.Then this paper gives the theory of covariance analysis describing functiontechnique; combined particle motion equation, the measurement part, filtering links, linksand equivalent guidance law, established an evaluation model of aircraft OptimalTerminal Guidance Law. Finally, the evaluation of examples can be found that theCADFT (Covariance Analysis Describing Function Technique) costs smaller workloadthan that of Monte Carlo method, but the analysis results in detail are not as good as thelatter.Finally, combined the above assessment theory and developed friendly Matlab userinterface. The software has three functions of the time/frequency domain index analysis,flight performance assessment and evaluation of the maturity.