Carrier aircraft landing mixed H_∞/H_2 LPV model reference control during powered approach

Due to an inherent coupling between roll rate and angle of sideslip during powered approach phase,the research study seeks to examine aircraft lateral mixed H∞/H2 linear parameter varying(H∞/H2 LPV) model reference control during a powered approach.The notion of sideslip with large amplitude is direct opposite to the sign of roll rate,especially in low angle of attack scenarios.This coupling will degenerate the handling quality and distract the pilot’s attention from landing.Currently,there is a methodology being used to solve the lateral control problem of coupling with mixed H∞/H2 linear fractional transformation(H∞/H2 LFT) which has reference model.The H2 model is able to restrain noise disturbance and reduce the coupling between different channels,which enables decoupling control during the landing and make the aircraft handling quality achieve the desired handling quality and at the same time reduce the workload of the pilots.A linear parameter varying(LPV) methodology,scheduled on angle of attack,was used for solving the parameter-dependent time-varying system having model uncertainty.In addition,the closed-loop system performance can further be improved,by exploiting the switching control theory of piecewise multi-Lyapunov functions.