Abstract: There are strong couplings between the attitude motion of a hypersonic vehicle，which can be divided into motion coupling，aerodynamic coupling，and inertial coupling． The aerodynamic coupling of aircraft is analyzed，the attitude controller is designed to weaken aerodynamic coupling． Firstly，the relationship between the aerodynamic moments of the hypersonic vehicle's three channels is analyzed． Secondly，by using the coupling analysis method of dynamic equations，the coupling relationship between the channels is obtained and the coupling matrices are solved． Then，combining the coupling matrices to judge whether coupling can be ignored，an attitude coordination controller is designed． The simulation results show that the designed controller can effectively weaken the aerodynamic coupling between the three channels of the aircraft，and improve the dynamic response ability of the system on the premise of ensuring the stability of the attitude．

Key words: hypersonic vehicle, aerodynamic coupling, coupling degree matrix, coordination control