چكيده لاتين :
This paper presents the stabilization of surge instability in multi-stage axial compressors using parallel distributed compensation (PDC) method based on Takagi-Sugeno (T-S) fuzzy model. In this study, the conservation equations of mass, momentum and energy are firstly employed for compressor stages to develop a multi-stage compressor nonlinear model. Based on the linear subsystems, a T-S fuzzy model is then constructed for the compressor. In addition, a PDC controller is designed based on the T-S model to stabilize the closed loop system where the LMIs required for the stability conditions are satisfied. Finally, computer simulation of the closed loop nonlinear model integrated with the PDC controller is performed where the compressor bleed is used as the control input. The results obtained show that the multi-stage compressor flow is stabilized through the transition between stable and unstable region. Moreover, the outlet bleed flow for stabilization of the compression system is only a small percentage of the total compressor mass flow, implying the effectiveness and the efficiency of the proposed approach.
