Modeling and output feedback control of automotive air conditioning system

作者：Zhang Quansheng^*; Canova Marcello

来源：International Journal of Refrigeration, 2015, 58: 207-218.

DOI：10.1016/j.ijrefrig.2015.06.005

• Air conditioning system
• H infinity synthesis
• Moving boundary method
• Automotive
• Singular perturbation method

This paper presents an application of robust control theory to an automotive Air Conditioning (A/C) system. A control-oriented model built using moving-boundary method is validated against experimental data collected on a vehicle chassis dynamometer, at constant engine speeds as well as on driving cycles. Next, an H-infinity controller is synthesized by formulating an optimization problem whose solution requires appropriate weighting functions selection. Singular perturbation method is utilized to remove states associated with fast dynamics in both model and controller. Both full-order and reduced-order H-infinity controllers are verified by simulation results obtained using the nonlinear A/C system model. It is demonstrated that the designed controller is capable of tracking the reference output trajectories while rejecting disturbances introduced on the boundary conditions of the heat exchangers. Furthermore, a preliminary study is performed to reveal the opportunity of designing a gain-scheduled H-infinity controller for global output tracking.

• 出版日期2015-10