Research on Robust Control Method of Hybrid Energy Storage System under Multiple Index Constraints

In order to solve the problem of dynamic stability of bidirectional DC/DC converters in external hybrid energy storage power supplies of magnetorheological damper (MRD) vibration control systems under external interference, a robust control algorithm with multiple index constraints is proposed. Considering the nonlinear error in the modeling process, the multi-cell linear parameter-varying (LPV) model of the converter is optimized. At the same time, based on the linear matrix inequality (LMI) theory, the H∞ performance index is used to suppress external disturbances, the regional pole configuration is used to characterize the stability of the closed-loop system, and the variance is used to characterize the response speed. A multiple index constrained robust control algorithm design form and methods are obtained. Finally, a bidirectional DC/DC converter simulation model is established for verification. The results show that the robust control method reduces the response time of the converter by about 34.4%, and has better noise immunity and robustness in the face of power shock, which can improve the reliability of the backup power supply of the MRD vibration control system.