Compound control of SIDO Boost converter based on improved feedforward active disturbance rejection
In order to improve the transient performance and stability of the SIDO Boost converter,a composite control strategy based on improved feedforward active disturbance rejection controller was proposed.Firstly,aiming at the non-minimum phase effect of the converter,combined with the step-down characteristics of the converter,the overall control strategy of a-branch double-loop control step-down output and b-branch single-loop control step-up output was designed by using the output redefinition method.Secondly,an improved feed forward active disturbance rejection controller was proposed for cross-coupling influence and disturbance problems.The load feed forward error signal was introduced to increase the system immunity and speed up the response speed.At the same time,an improved extended state observer was designed to improve the observation accuracy and response speed.The discontinuous function of the adaptive super-twisting sliding mode feedback control law was improved to further suppress the system chattering.Then,the stability of the feedback control law was proved by Lyapunov theory.Finally,the experimental platform was used for experimental verification.The experimental results show the effectiveness and superiority of the proposed control strategy.
SIDO Boost converternon-minimum phase characteristicscross-coupling effectfeed forward active disturbance rejection controlLyapunov theory
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