Application of Car Semi-Active Suspension Systems to Achieve Desired Performance on Decreasing Effect of Road Excitation on Human Health

Using passenger cars for daily traveling include advantages and disadvantages simultaneously; this daily traveling causes variety of road excitations in the form of vibration with different amplitude and acceleration to be imposed on body. Exceeding the standard limitations of these parameters results in fatigue, restlessness, and health problems. In this paper, a quarter-car model with semi-active suspension system is considered and three control approaches are applied to reduce these parameters in the limit of standard. Results show adaptive fuzzy optimal controller has better performance compared to others in controlling the critical health parameters, and can be easily used in future cars for minimizing unexpected hazards imposed on human body due to road excitations.