Research On Control System Of Simulated Atmospheric Pressure Cabin

With the development in the field of aeronautics, especially the large aircraft and the special aircraft, higher requirement for CPCS (cabin pressure control system) was raised. For the convenience of the design and experiment of CPCS, a SAPC (simulated atmospheric pressure cabin) that can simulate the atmospheric situation when aircraft are at different flight states was necessary. The keys to the development trend of CPCS—electronic-electric CPCS are the control method and control law. In this study, a fuzzy logic control was proposed to accomplish the electronic-electric control of the SAPC.A FIR digital filter is applied after compared with several other digital filters to deal with the fluctuating pressure signal. It weakens the random error and improves the data smoothness remarkably.In this study, a mathematic model was established and dynamic characteristics simulation was conducted in Matlab to prove the validity of the fuzzy logic control.Virtual instruments technology was applied to build the measurement and control system and develop the software for the experiment, which improve the efficiency of the study. Finally the velocity control experiment of SAPC at several flight states was accomplished which has a good effect.The study has certain significances on developing electronic-electric CPCS.