Research on Tractor Active Seat Suspension Based on Model Predictive Control

In order to reduce the influence of ground vibration generated by tractors during driving and operation on driving stability and driver ’s ride comfort, this paper proposes a tractor active seat suspension control method based on model predictive control (MPC). Through the establishment of three degrees of freedom tractor active seat suspension model, electromagnetic actuator (linear motor) model and ground excitation input model, the inner and outer loop control strategy of linear motor active seat suspension based on outer loop MPC control and inner loop current hysteresis comparison control is proposed. The influence of MPC parameters on the vibration performance and control cost of seat suspension is compared and analyzed through experiments. The appropriate system parameters are selected through optimization analysis. The simulation and experimental results show that compared with the passive seat suspension and PID seat suspension, the tractor active seat suspension based on model predictive control improves the ride comfort and vibration reduction characteristics of the tractor, and on this basis, it reduces the energy consumption required for the seat suspension system to achieve active control, while ensuring the timeliness of MPC control.