Papers by Author: Ling Yu Yang

Abstract: Based on the wing damaged aircraft for background, the online identification method of mutational parameters was studied. After structure damaged, the symmetry of the aircraft was broken, causing the pneumatic structure of the vertical and horizontal highly coupled. To identify the aerodynamic parameters, firstly aerodynamic forces and moments were estimated as the output data of identification. Then the model of identification was selected according to the coupled pneumatic structure. Finally an identification method called Limited Recursive Least Squares (LRLS) was introduced, in which forgetting factor, weight matrix and limit item were used. The simulation results show that this method is capable to resolve the problem of strong coupling and sudden changing, while meeting the real time and accuracy requirement of online identification.

Abstract: The CAT III longitudinal automatic landing control laws based on multi-objective optimization is discussed. Firstly summarized the CAT III airworthiness criteria and transformed into the specifications of control system. The configuration of the longitudinal automatic landing controllers is proposed secondly and multi-objective optimization is used to tradeoff free parameters of the controllers. The Monte Carlo simulation results show the designed control laws fulfill the CAT III requirements, when there are uncertainties of structure, measurement error and disturbances.