Composite control method for non-minimum phase single inductance dual output Buck-Boost converter
An control strategy combining improved non-singular fast terminal sliding mode(NFTSM)and active disturbance rejection control(ADRC)based on the extended state observer(ESO)of energy storage function was proposed,in view of the cross-influence and non-minimum phase characteristics of single inductance dual output Buck-Boost(SIDO Buck-Boost)converters operating in continuous inductance current mode(CCM).Firstly,the main controller was designed,and the ADRC normal form was obtained by fitting the transfer function of the system,which was used to decouple the main path.Secondly,the branch controller was designed,and the improved ESO was used to observe the energy function,and the observed value was compensated into the non-singular fast terminal sliding mode control law to achieve the branch decoupling effect.The approach law was improved in order to suppress the chattering problem of sliding mode control.Then,the stability of the system was proved by the Lyapunov theory.Finally,experiments were carried out based on the hardware-in-the-loop(HIL)experimental platform,and results showed that the proposed control strategy had better effect on overshoot and response time than PI control strategy and ESO-based sliding mode control strategy.
single inductance dual outputBuck-Boost converternonsingular fast terminal sliding mode con-trolself disturbance rejection controlimproved sliding mode approach law
万方数据
维普
