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There is a growing interest on narrow vehicles which can partially solve the parking, congestion and pollution issues associated with urban transportation. A novel narrow vehicle, UW-Car, which is based on a mobile wheeled inverted pendulum (MWIP) platform and a movable seat is proposed in the paper. The three dimensional dynamic model of the underactuated system running on the flat ground is derived...
Nowadays in the automobile sector, seeking reductions in emission and fuel consumption in Hybrid Electric Vehicles (HEVs) is an increased focus. The series-parallel HEV has an architecture that is more diverse than other types of HEVs as it joins both the advantages of series and parallel HEVs. One of the reasons that series-parallel HEVs are more complicated and complex is due to Power Split Devices...
This paper will show how to handle modeling of vehicles to get efficient and good Sliding Mode Observers. A car model with 16 DoF is decomposed for partial state observation with SMO. This decomposition method may lead, in VSAS, to good estimates of different kind variables and inputs (subsystems states, environment and ground variables, interfaces variables, connections and constraint variables)...
There is a new way, using FLUENT--a computational fluid dynamics software, to analyze the inside flow field of hydraulic retarder instead of using one-dimension flow theory. In the simulation process, the inside flow field is assumed whole fluid-filled. And the moving areas use sliding mesh model while the turbulence model chooses standard two equations model. Finally, there are analysis of the pressure,...
A variable structure model reference adaptive control (VS-MRAC) strategy for automatic active steering of a two wheel steering car is proposed. An ideal steering system with fixed properties and moving on an ideal road is used as the reference model, and the automatic active steering system is forced to attain the same behavior as the reference model. The proposed system can treat the nonlinear relationships...
In this article we study a two-level driver model composed of one anticipatory and one compensatory control. The anticipatory control, executed in an open loop, is based mainly on the standard linear equations for the lateral dynamics of the vehicle. The compensatory control, executed in a closed loop, uses N PID controllers for the correction of lateral deviation, and other N PID controllers for...
In this paper, the state equation for the dynamics of quarter car is established, and the nonlinear Antilock braking system is transformed into linear uncertain system model. So the stability problem of nonlinear Antilock braking systems becomes the robust stability problem of linear uncertain systems. Sliding mode control approach is employed to guarantee robust stability of linear uncertain systems...
This paper explains a method of four-wheel steering control by using sliding mode control (SMC). The purpose is to improve the control safety of four-wheeled vehicle by using invariable SMC for the cross-wind disturbance that satisfies the matching condition. Influence of the side wind are thought as the cross-wind disturbance related to driving the car. Steering control that corresponds to the influence...
The research developments and structural feature of electro-hydraulic brake (EHB) system were investigated. EHB and vehicle dynamic models were established and analyzed. The control strategy was accomplished for vehicle stability control with EHB system and verified by simulation in typical condition of steering under braking at low-friction condition. The simulation results show that the controller...
This paper presents the use of backstepping controller in order to construct an active suspension for a quarter car model with observer design. The implementation of backstepping controller is presented in non-linear quarter car model for active suspension system. The movement of the rotational motion of arm has been taking into consideration for this system which has been neglected by the linear...
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