5. Semi-Active Control Tracking Active Control

The chapter introduces a new polynomial mathematical model for predicting the output of Magneto-Rheological Dampers (MRDs) in vibration control systems. The model, a 6-segment cubic polynomial, addresses the limitations of lower-order polynomials and high-order fitting issues, providing high accuracy and consistency with test data. The chapter also presents an open-loop control strategy for MRDs, which simplifies the application of these dampers in semi-active control systems. The strategy uses the inverse solution of the ideal input force to determine the MRD control current, enabling effective control without the need for complex closed-loop systems. The chapter highlights the successful tracking of nonlinear damping forces and the equivalence of MRD semi-active control to optimal active control strategies, demonstrating the practical advantages of using MRDs in vibration control systems. The research showcases the potential of MRDs to replace complex active control systems, offering a more efficient and cost-effective solution for vibration control in various industries.