Designing an Optimal Non-Linear Controller for an Active Vehicle Suspension System and Investigating its Effect on Electrical Energy Harvesting

Document Type : Research Article

Authors

1 Department of Mechanical Engineering/Sahand University of Techno logy/Tabriz/Iran

2 صنعتی سهند-مهندسی مکانیک

3 Faculty of Electrical Engineering /Tabriz /Iran

Abstract

One of the most important challenges in using active vehicle suspension systems is the high energy consumption of these types of systems. The use of the energy harvesting system is one of the ways to reduce energy consumption in active suspension. In this paper, by designing a new optimal controller of the vehicle's active suspension system and the energy harvesting system, their interaction with them has been investigated. The active control loop calculates the required force to realize the desired mechanical performance. The method is based on the constrained nonlinear predictive control algorithm obtained from the continuous model of the system. Also, the mechanical indices of the suspension system, including travel comfort and road-holding, are managed by the weight coefficients defined in the active control algorithm. The effect of the weight coefficients on the maximum harvesting of energy, while achieving the desired mechanical performance is another issue that has been addressed in this article. The simulation results for two types of the road show that the proper use of the active control algorithm leads to the realization of the desired mechanical performance along with the maximum harvesting of energy.  Also, the external energy consumption of the active control system is significantly reduced.

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