Output Feedback Control of Automotive Air Conditioning System Using $$H_{\infty }$$ Technique

Fault Detection and Isolation of Automotive Air Conditioning Systems using First Principle Models

“…The dynamics related to the heat and mass transfer inside the heat exchangers are described using the MBM method [26], [28], where Reynolds transport theorem describing the mass and energy conservation for transient one-dimensional flow is applied to each phase region of the condenser and evaporator with boundary conditions and refrigerant properties specified. After derivations detailed in [38] and not included here for brevity, the final mathematical equations describing system dynamics are in the descriptor form,…”

“…The Z matrix and f vector are complex expressions of refrigerant properties, heat transfer coefficients and geometric parameters [38].…”

“…Finally, the output vector y includes the evaporator pressure and superheat temperature, y = p e SH T , which are algebraic functions of states, g(x). The Z matrix and f vector are complex expressions of refrigerant properties, heat transfer coefficients and geometric parameters [38].…”

“…The original A/C model in state-space form is augmented with the output vector and disturbance vector defined, and a H ∞ controller is obtained by solving Linear Matrix Inequalities (LMIs) associated with the augmented system according to methods provided in [43], [44]. The above design procedure is detailed in previous work [38], where simulation results are provided to support the validity of the controller during output tracking and disturbance rejection.…”