Vibration suppression of CFRC plates considering piezoelectric nonlinearity effects

Carbon fiber reinforced composite (CFRC) structural components often face complex operational environments in practical applications, which leads to particularly prominent vibration problems. To effectively suppress harmful vibrations, active control technology based on piezoelectric materials offers a viable solution, but it typically requires the application of a strong driving electric field. This study focuses on the nonlinear effects of piezoelectric materials under a strong electric field, and establishes a nonlinear electromechanical coupling model of CFRC plates with piezoelectric materials. On this basis, a fuzzy-LADRC (F-LADRC) adaptive controller with strong robustness is proposed for the vibration suppression of CFRC plates. By comparing the results of the literature and the COMSOL finite element model, the correctness of the model is preliminarily verified, and the characteristics of the piezoelectric nonlinear effect are discussed. A response test system is set up to characterize the nonlinear behavior of PZT-5H under a strong electric field, and the nonlinear electroelastic strain constant of the piezoelectric material is obtained through the parameter identification process. Finally, simulation and experimental tests show that the F-LADRC controller is more robust and has a better response speed. In addition, the analysis results show that better control effects can be achieved at a smaller input voltage when considering piezoelectric nonlinearity.