For vehicle external aerodynamic computation, the selection of the turbulence model is very important. In current research, ten RANS turbulence models were introduced to compute the time-averaged flow field around the...
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SnO2 ceramics were synthesized by SPS. Phase compositions and microstructures are examined by XRD, SEM and EDS, respectively. Sb2O3 used in our research were beneficial to lower the sintering temperature and promote t...
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Based on the ABS model of a single wheel system,the traditional logic threshold,PID and fuzzy control method have been used to study the control system of commercial vehicle's *** the most important task of commer...
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Based on the ABS model of a single wheel system,the traditional logic threshold,PID and fuzzy control method have been used to study the control system of commercial vehicle's *** the most important task of commercial vehicle's ABS is to prevent the two front(steering) wheels from locking,the slip ratio should be controlled strictly in the safe range.A very short time of locking may cause the failure of steering,so control method which can keep slip ratio in the secure scope accurately can help vehicle avoid the danger of *** up the model on Simulink ***,use the three control methods to control the *** comparing and analyzing the processes and results under the control methods,find an appropriate way that can provide the most secure and effective *** the perspective of processes(slip ratio changes),the simulations under the three control methods show the PID control gives the best slip ratio *** curve is almost coinciding with the ideal slip ratio *** oscillation of slip ratio given by fuzzy control is the most *** the point of view of the results(braking distance),the braking system with PID control has the shortest braking distance while with the fuzzy control has the *** is not to say fuzzy control is not advanced but the actual experiences difficult to *** with the long response time,the fuzzy control is not suitable for commercial vehicle's *** a result and with the development and decreasing cost of PID controller,it is competitive in today's ABS market.
PID control and the velocity feedback control for ABS are studied of the wheel slip rate as controlled *** on these two kinds of control methods is *** is obtained that velocity feedback control and PID control exist ...
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PID control and the velocity feedback control for ABS are studied of the wheel slip rate as controlled *** on these two kinds of control methods is *** is obtained that velocity feedback control and PID control exist much similarity in some extent,according to the hardware in the loop(HIL) simulation ***,the velocity feedback control has more obvious advantages than PID control in terms of the adaptability to different road *** can maintain stable control of system dynamically under the changed road condition,leading to the braking distance shorter.
HyperMesh was used to mesh the absorber spring plate, and MATLAB was used to read-in grid node coordinate file and to carry on multi-target structure topological optimization design through the self-compiled program. ...
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Aimed at estimating the remaining driving range of electric vehicle(EV) on dynamic working condition and exploring the influences on remaining driving range estimation, combined GT-Drive and Matlab, EV simulation mode...
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Based on the Free scale S12 processor as the main MCU,the article have designed the hardware circuit of the electronic parking brake system control unit,and on the basis I have made the rational analysis of the contro...
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Based on the Free scale S12 processor as the main MCU,the article have designed the hardware circuit of the electronic parking brake system control unit,and on the basis I have made the rational analysis of the control of the total the electronic parking brake *** analysis and experiment results show that the design can realize the basic function of EPB,to a great extent,it also improve the reliability of the system,fault self-checking ability and delayed its working life and just right to satisfy the most basic and most critical requirements of the system:As part of the braking system,it should have the reliability and security.
Application of computational fluid dynamics(CFD) in the design of the road sweeper is a new and effective method for the feasibility *** using CFD technology to analyze the flow field of the road sweeper airstream sys...
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Application of computational fluid dynamics(CFD) in the design of the road sweeper is a new and effective method for the feasibility *** using CFD technology to analyze the flow field of the road sweeper airstream system,we can obtain the characteristic parameters before it is manufactured,so that the analysis and design of the airstream system can be carried out *** have shown that combining with the specific engineering practice,the application of CFD on the flow field simulation has a certain reference value for the design and optimization of the sweeper airstream system.
When Electronic Parking Brake test bench validates the function of ramp start,Electronic Parking Brake(Simplified as EPB) control motor has been blocked state,the motor heat is *** putting forward the performance requ...
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When Electronic Parking Brake test bench validates the function of ramp start,Electronic Parking Brake(Simplified as EPB) control motor has been blocked state,the motor heat is *** putting forward the performance required by the motor cooling system,and the cooling control system scheme and the control strategy of intelligent electronic pump motor by building a mathematical module about cooling system of EPB motor,this paper designs and develops the electronic water pump motor controller,including the efficient control on the pump,and the communication with the main controller,which is based on CAN bus and SAE J1939 and optimizes the hardware and software of motor controller so that the pump efficiency may reach 32%.The product-level design,shown by a large number of performances testing,is achieved.
In order to ensure good performance and extend the lifetime of li-ion batteries in electric cars,effective real-time monitoring and management must be *** paper designs an electric vehicle battery management system ba...
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In order to ensure good performance and extend the lifetime of li-ion batteries in electric cars,effective real-time monitoring and management must be *** paper designs an electric vehicle battery management system based on a smart battery monitoring chip,*** integrates the measurement of battery's temperature,voltage,current,and power as a whole,which not only simplifies the circuit,but also saves system *** battery's SOC(State Of Charge) can be easily estimated and displayed in this *** improves the reliability of power battery pack and prolonged its life,which can be used as reference to battery management system design and application.
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