Based on multi-body dynamic method, a rigid-flexible coupling model of a heavy-duty truck with full-floating cab mount system, air suspension system with four airbags and taper-leaf-spring system was built. Some simul...
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Based on a cab suspension system of a commercial vehicle, a multi-body dynamic model was built on ADAMS Software for the vibration modal analysis. An Experiment was taken for the verification of the model's accura...
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Electronic stability control system (ESC) is one of the advanced active safety technology for modern vehicles. The active yaw-moment control (AYC) is one of the most important parts of ESC to enhance vehicle active sa...
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Electronic stability control system (ESC) is one of the advanced active safety technology for modern vehicles. The active yaw-moment control (AYC) is one of the most important parts of ESC to enhance vehicle active safety. The control method with combination of logic threshold and PID method is brought out. The PID parameters are generated by logic threshold method through the controller adjusting parameters. The wheel brake torque to keep vehicle stable is calculated by PD controller. The self-correcting threshold of PD control algorithm has the merit of decreasing calculation processes and increasing computation speed. The results of simulation show that the proposed algorithm can be used to control the vehicle more stably under various conditions.
In this paper, a new cooperative control system is proposed for the vehicle's steering antilock braking stability fields. The cooperative control architecture is composed with the steering controller and the braki...
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In this paper, a new cooperative control system is proposed for the vehicle's steering antilock braking stability fields. The cooperative control architecture is composed with the steering controller and the braking controller. Based on the yaw moment and the front wheel angle controllers, the vehicle steering controller was designed to improve the respond and stability of the vehicle. Besides, the anti-lock brake control system was designed. To reduce the complexity of control structure and the difficulty in determining the compensation control law of commonly used cross the steering system and the braking system, a new cooperative error and a new coupling control strategy based on the thought of the parallel control with error compensation were presented. Finally, the stability and the validity of the control algorithm are validated by simulation results.
With xPC Target we can convert a PC compatible computer into a real-time system and build a hardware in-loop test bench of ESP system based on CAN bus technology. It will be more convenient and faster than traditional...
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With xPC Target we can convert a PC compatible computer into a real-time system and build a hardware in-loop test bench of ESP system based on CAN bus technology. It will be more convenient and faster than traditional way. Since there is not a drive module of CAN PCI-1680U which could be invoked directly in xPC Target, by using S-function, the article compiled a drive module which can be invoked in xPC Target and used in ESP hardware-in-loop test bench, and achieved the CAN telecommunication between ECU and sensors.
Sensor fault-tolerance control technology plays a significant role in maintaining the reliability of a Steering-By-Wire system. Based on the multi-dimension Gauss Hidden Markov Model (HMM) algorithm, this paper presen...
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Sensor fault-tolerance control technology plays a significant role in maintaining the reliability of a Steering-By-Wire system. Based on the multi-dimension Gauss Hidden Markov Model (HMM) algorithm, this paper presents a steering wheel angle sensor fault-tolerance control strategy in the Steering-By-Wire system using hardware redundancy technique. The impact of this strategy is examined through HIL (Hardware-in-Loop) experiments and test results demonstrate that the strategy proposed and employed here can effectively improve the performance of a Steering-By-Wire vehicle in terms of increasing its reliability and strengthening its security against sensor failures.
The Toyota Prius is the bestselling hybrid vehicle on current market. The power split device (PSD) in the Toyota Hybrid System (THS) is the key component in Prius. And the differential is the essential component in au...
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The Toyota Prius is the bestselling hybrid vehicle on current market. The power split device (PSD) in the Toyota Hybrid System (THS) is the key component in Prius. And the differential is the essential component in automobile drive axel. The PSD in hybrid electric vehicle (HEV) and the automobile differential both belong to planetary-gear system, although they have different mechanisms. In theory, it is feasible to apply automobile differential as the PSD in HEV. However, in the study of this new concept, it is found that under the PSD working conditions the inner friction of the differential acts in a longer time, and it causes the differential shaft failure. In this paper, for redesigning the differential mechanism to reduce its inner friction, the dynamic characteristic of automobile differential with inner friction was analyzed in detail. And to assess the effect of reducing friction after redesigning, a virtual prototype of the differential was modeled in ADAMS, and verified by the experiment data.
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