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This paper is concerned with the design of an L2 gain state derivative feedback controller for an active suspension system with driver model. A five-degree-of-freedom model having an integrated vehicle seat, a seated human body and a quarter vehicle is used to analyze ride comfort, safety requirements and power consumption. In order to investigate effectiveness of proposed method, performance of the...
This paper describes a state feed-back tracking controller with parameter uncertainties for vehicle dynamics with a four-wheel active steering system as well as an active suspension system. The objectives of the proposed controller are to improve the vehicle behavior by forcing the lateral dynamics and the load transfer ratio to track the desired vehicle behavior in critical situations. The Takagi-Sugeno...
In this paper, a novel application of a soft sensor via Neural Networks is proposed. One of the most critical issues in the car is the area where the tires are in contact with the ground, these are the only points of contact between the vehicle and the road. The importance lies in the fact that keeping the tire contact patch within the operational parameters ensures the safety, comfort and maneuverability...
Safety restraint systems greatly reduce the potential injury risk during vehicle accidents. One major type of accident still remains without adequate occupant protection: Vehicle Rollover. Safety restraint systems for rollover require the prediction of rollover accidents. In this paper, different approaches to detect and predict rollover are investigated. The focus is put on boundaries, requiring...
Cloud computing usage is growing, and soon the vast majority of organisations will rely on some form of cloud computing services. Cloud computing is being adopted in critical sectors such as energy, transport and finance. This makes cloud computing services critical in themselves. When cyber-attacks and cyber disruptions happen, millions of users are affected. Infrastructure vendors will inevitably...
When conflicting performance requirements are present, appropriately switching between differently tuned controllers can considerably enhance the closed-loop performance compared to a single control law. However, it is a well known fact that such a control strategy can result in unbounded state trajectories, even if each controller individually stabilizes the plant. In this paper, a new passivity-based...
A major problem in the handling of high speed performance vehicles is the rolling of the vehicle. While pushing the car to the limit sometimes the less experienced drivers tip it over the safe speed line and rolling of the car takes place. It leads to a number of accidents and thus in order to reduce the rolling effect we have come up with the innovation of Roll Sensing Control Unit(RSCU). The RSCU...
Safety analysis and the forced vibration characteristic investigation of a single DOF vehicle suspension system with hysteretic nonlinearity characteristic under road quasi-period multi-frequency excitation is carried out in this paper. Probability of system occurred chaos and disturb state character of closed-trajectories near center is studied though the Melnikov' function and KAM theory. The complexity...
This paper set up a system which was made of truck, cargo and constraint device. To model this system, the paper selected EQ_1156W_3 truck as the research object, and used two TD_50B as the cargo constraint device according to the mass of the cargo and the American standard. Used lateral acceleration as rollover index of vehicle-cargo-constraint system, and calculated the rollover threshold in order...
Safety for the occupants of the cab is a prime consideration for structure design on commercial vehicle. The cab shall be designed and attached to the vehicle in such way that in the event of collision exhibit a survival space for the occupants, meanwhile,the cab must remain attached to the chassis frame. The new more legal and strict safety test requirements are specified by proposal for ECE R29-03[1]...
This study concerns with the application of multi-objective H∞/GH2 preview control to a real quarter vehicle suspension system. To this goal both linear and nonlinear models of the test rig are derived, and a unified design framework for preview design schemes of LQG-preview and multi-objective preview is introduced. Simulations are carried out to compare both strategies. The study involves the inclusion...
This paper develops an LMI-based solution for output-feedback constrained H∞ control design, and considers it for active vehicle suspension system. A quarter car model, which captures many features of real structures, is used in this study. To take more general road disturbances than white noise into account in the design procedure, H∞ performance measure is used to judge ride comfort, ride safety...
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