The possibility of regenerative braking is one inherent advantage of hybrid electric vehicle. The motor and the hydraulic braking system are braking together while the hybrid electric vehicle is braking. But, the diff...
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The amplitude of switching overvoltages is a key factor for designing the insulation of UHV equipment. The effect of different arresters needs to be studied, since installing arresters is an important way to suppress ...
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The amplitude of switching overvoltages is a key factor for designing the insulation of UHV equipment. The effect of different arresters needs to be studied, since installing arresters is an important way to suppress switching overvoltages in UHV transmission lines. Switching overvoltages on the 1000 kV Huainan-Huxi double-circuit transmission line were simulated for different operating modes and different arrester designs using the electromagnetic transient program PSCAD/EMTDC. With parallel resistors, the switching overvoltages are less than 1.70 p.u. （1.0 p.u.=1100×√ 2 /√3 kV）. If the arrestors are better, the switching overvoltages can be reduced even lower to 1.55 p.u. Without parallel resistors, the arresters can reduce three-phase energizing overvoltages to 1.70 p.u, while the single-phase reclosing overvoltages still exceed the limit. The results show that the parallel resistors cannot be eliminated if the arresters are only installed at each end of the transmission line. Also, better quality arresters significantly lower the switching overvoltages.
Stability, rapidity and accuracy are very important performances in Electric Power Steering (EPS). In this paper, it was explained that the contradictions among these performances can't be avoided when using tradi...
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The rubber material's hyperelastic model constants are characterized based on test date. The structure model and the fluid model of light vehicle cab's hydraulic mount are established, and imported into Adina....
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The rubber material's hyperelastic model constants are characterized based on test date. The structure model and the fluid model of light vehicle cab's hydraulic mount are established, and imported into Adina. The fluid-structure interaction model is established by Adina. The hydraulic mount's static characteristics are analyzed using quasi-static method. For dynamic characteristics analysis, the flow model of fluid is assumed to be turbulent K-Epsilon RNG. Dynamic stiffness and loss angle of the hydraulic mount are simulated based on this finite element model. The simulations of static and dynamic characteristics agree well with test results. The effects of primary structure parameters to the dynamic characteristics of the hydraulic mount are analyzed based on the finite element model.
The distributed parameter dynamic model for two manipulators handling a flexible payload is proposed by Hamilton's principle. A composite controller is designed based on singular perturbation model with external d...
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Using iSIGHT and ABAQUS software, this paper illustrates a finite element method and process for optimizing rubber bushing material and structural parameters, in order to meet specific stiffness characteristics. Final...
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A flexural stiffness calculation method based on statistical theory was proposed. The flexural stiffness of a bus body was calculated in different loading methods, then the fact that the stiffness results meet the Gau...
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A flexural stiffness calculation method based on statistical theory was proposed. The flexural stiffness of a bus body was calculated in different loading methods, then the fact that the stiffness results meet the Gaussian distribution using chi-square test was verified, so that the sample average could be considered as the bus body flexural stiffness. In order to improve the calculation efficiency, an auto body flexural stiffness calculation program was programmed by FORTRAN language, so the whole stiffness calculation process would be completed automatically.
For solve the jerk of the dual-clutch ISG hybrid electric vehicle within engine staring process, on the basis of analysis about vehicle power-train dynamics, engine drag torque characteristic, and the motor characteri...
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The active control system of pipeline noise of engine exhaust is a time-varying systems, that includes a sub-channel identification. The tracking in time plays an important role, and that is a hardcore of algorithm fu...
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ISBN:
(纸本)9781424480364
The active control system of pipeline noise of engine exhaust is a time-varying systems, that includes a sub-channel identification. The tracking in time plays an important role, and that is a hardcore of algorithm functions. A new variable step algorithm with leakage was designed (aNFxLMS) by the improving normalized LMS adaptive algorithm, it can be used to tracking bad time-varying systems. Using Matlab mathematical test show that algorithm is reasonable. It was proved a good algorithm, that a simulation of active control system to control noise of engine exhaust was designed through program of Simulink. Therefore, numerical simulation can provide theoretical guidance for real vehicle applications and algorithm testing.
The rear impact model of full vehicle was built according to "GB20072-2006 the requirements of fuel system safety in the event of rear-end collision for passenger car". Collision response of 140 ms was calcu...
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The rear impact model of full vehicle was built according to "GB20072-2006 the requirements of fuel system safety in the event of rear-end collision for passenger car". Collision response of 140 ms was calculated by PAM-CRASH. The comparison of simulaton and test verified the model validity and found the lack of enegy absorption of rear longeron and higher acceleration. The objective was to optimize the rear longeron structure for the increased rear crashworthness, and it was satisfied with the requirement of national standard.
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