in this paper a survey to determine the spring and damper settings of itm285 tractor’s cabin which ensured optimal ride comfort of tractor operator was conducted. analysis has been done in terms of root mean square acceleration response (rmsar) in one-third-octave band and international standard organization (iso). optimization was performed using particle swarm optimization (pso) method on a 2...

Recently we proposed a novel nonlinear control design for active suspensions, which features a lter whose band-width is a nonlinear function of suspension travel; this lter results in an improved tradeoo between ride comfort and rattlespace usage. In this paper we augment this controller with a new road-adaptive algorithm which continuously monitors suspension travel and adjusts on-line the sha...

Ride quality depends on a combination of vertical displacement (heave) and angular displacement (pitch). Road irregularities are the main factor affecting ride comfort. Suspension elements between the road wheels and the vehicle body generate vertical forces which excite both heave and pitch motions. An active controller design based on time-scale separation and an "input decoupling transformat...

The stability and comfort of vehicles depend on the operation suspension system. To increase smoothness for passengers in vehicle, stiffness system needs to be changed flexibly. conventional pneumatic can partially meet these requirements. However, change is not much. This paper introduces a model integrated with hydraulic actuator. completely novel unique method. In case that excitation random...

This study introduces an online reconfigurable road-adaptive semi-active suspension controller that reaches the performance objectives with satisfying dissipativity constraint. The concept of model is based on a nonlinear static Magnetorheological (MR) damper considering bi-viscous and hysteretic behaviors damper. input saturation problem has been solved by using proposed method in literature a...

The car suspension setting is always a trade-off between comfort and handling. semi-active damper system seems to be an option for reducing the compromise two demands. This paper deals with effect of magnetorheological on car’s performance, especially tire grip, which was directly measured. A unique test rig developed, experimental trolley fast (response time 3 µs) used in paper. controlled by ...

When the vehicle moves, bump on road surface is main factor affecting vehicle's stability. It produces non-cyclic oscillations and causes a feeling of discomfort fatigue for passengers. The suspension system used to regulate reduce these negative effects. In order improve stability comfort, active replace conventional passive system. There are many methods control system, each with its advantag...