MIMO controller design for two-input DC-DC converter without de-couplers

An analysis and controller design of the multi-input multi-output DC-DC conversion system is reported here. The controller designed by solving standard H
∞
based Riccati equation is of very high order, which are practically not feasible to design, therefore LMI based techniques can be utilized in which, structure and nature of the controller can be fixed by introducing some new sets of constraints on the structure of controller state-space matrices. Here, de-centralized type of controller is designed without de-coupling the original system and considering the interactions in the actual system. The performance of designed controller is investigated in terms of performance parameters in the presence of input and load side disturbances and found satisfactory.