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The research presented here aims to improve the sensory economy of an all-accelerometer inertial measurement unit (IMU). The authors will show that accelerometers are underutilised in this class of IMUs when they are attached to dynamically constrained systems. This scenario usually warrants one of two solutions; each being geared towards general unconstrained motion. In this paper, however, the authors...
Electric Power Steering (EPS) systems have many merits over traditional hydraulic power steering systems in fuel economy, variable assist capabilities and favorable road feeling by virtue of adjustment assist characteristic with adopting assist motor in replacement of hydraulic pump. This paper aims at modeling the mechanical parts, the assist motor and electronic control unit by bond graph technique...
This paper introduces a new control scheme for active steering of vehicle. An ideal reference model followed by the four-wheel steering (4WS) vehicle is established resulting from the front-wheel steering (FWS) vehicle, and an H∞ optimum controller for the 4WS vehicle is designed based on model following technology. The dynamic simulation is performed to verify control effect of the H∞ controller,...
According to the concrete structure of HEV with double power sources, a vibration model of the 5-dof vehicle driven by both engine and electric motor(Switched reluctance motor) is established. Based on the analytical method, the study analyzes the situations of the vibration response of the vehicle and the man-seats to the double driven sources and has obtained the ideal simulation results of the...
Based on the coupling of PC-Crash and embedded MADYMO, the impacting vehicle and pedestrian are respectively modeled as a multi-body system. The influence laws and factors of upward throw and lateral deviation distances for the impacted pedestrian involved in a vehicle/pedestrian collision are in depth analyzed with simulating by selecting main factors influencing on contact location for pedestrian's...
In every vehicle collision, the work-energy principle must be satisfied, i.e., the work done in stopping the driver must be equal to the driver's kinetic energy. Existing restraint systems such as airbags and seatbelts are designed to minimize injuries by smoothly absorbing the kinetic energy of the occupant during a crash event. Advanced systems are being developed to tailor their level of restraining...
The paper firstly calculates the optimal location of external torpedoes. And then the dynamics model of the UUV hanging torpedoes externally is established. Also, the force and moment the torpedoes exerted on the unmanned underwater vehicle are analyzed. Based on the model, the corresponding maneuverability simulation program is derived using SIMULINK. The results show the variation of the maneuverability...
To accomplish the demand of minimum fuel consumption and good power performance for continuously variable transmission (CVT) car. Aiming at the whole vehicle model including the engine, the clutch and the CVT, the dynamics mathematical model of CVT system is established according to different stages of clutch engaging, that the dynamic integrated simulation model is developed. A parameter self-adjusting...
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