Analysis and QFT Based Controller for Buck and Boost Based Double Input DC-DC Converter

The paper examines the application of the Quantitative Feedback Theory (QFT) robust control strategy to the Buck and Boost Based Double Input Converter (BBBDIC). This approach is used for controllers in MIMO (Multi inputMulti output) systems with model uncertainty. The proposed controller is developed to achieve robust performance while addressing plant uncertainties and external disturbances. The controllers are validated through performance specifications. The model of a MIMO plant consists of multiple internal paths that create interconnections between the plant's inputs and outputs. To analyze the QFT methodology, two independent diagonal controllers are employed. Simulations are performed using MATLAB and PSIM tools to evaluate the performance of the BBBDIC converter and the robust controller. A 60/12 V to 42 V, 100 W, 50 kHz ratings are taken into account to validate the controller within the simulation environment. Designed controller set is also tested experimentally and thus validating the QFT design.