The mathematic models of civil aircraft air conditioning system (ACS ) main components were built

and corresponding simulation modules

together with cabin/cockpit heat load module etc were developed on the Matlab/Simulink platform. By applying the built component modules

the ACS simulation model was established. The flight test instrumentation was installed on domestic civil commercial aircraft ACS and the test was conducted. By comparison with the test data

it is found that the error of the simulation results is within 2%. This shows that high accuracy of the simulation module and valid simulation methods have been achieved. It is of great value in civil aircraft ACS design

optimization and airworthiness compliance/verification.