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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Heterogeneous reactions of gaseous methanesulfonic acid (MSA) with calcium carbonate (CaCO3) and kaolinite particles at room temperature were investigated using diffuse reflectance infrared Fourier transform spectrosc...
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Heterogeneous reactions of gaseous methanesulfonic acid (MSA) with calcium carbonate (CaCO3) and kaolinite particles at room temperature were investigated using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and ion chromatography (IC).Methanesulfonate (MS-) was identified as the product in the condensed phase,in accordance with the product of the reaction of gaseous MSA with NaCl and sea salt *** the concentration of gaseous MSA was 1.34 × 10-13 molecules cm-3,the uptake coefficient was (1.21 ± 0.06) × 10-8 (1) for the reaction of gaseous MSA with CaCO3 and (4.10 ± 0.65) × 10 10 (1) for the reaction with *** uptake coefficients were significantly smaller than those of the reactions of gaseous MSA with NaCl and sea salt particles.
The heterogeneous reaction of SO2 on TiO2 particles was studied using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS).The influences of the oxygen concentration,relative humidity (RH),and ...
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The heterogeneous reaction of SO2 on TiO2 particles was studied using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS).The influences of the oxygen concentration,relative humidity (RH),and ultraviolet (UV) light illumination (λ=365 nm) intensity on the reaction were *** main product of the heterogeneous reaction of SO2 on TiO2 particles was sulfate with UV illumination and sulfite without *** production of sulfate was promoted significantly with UV illumination or water,and there was a synergistic effect when both were *** the dry system without UV,the heterogeneous reaction of SO2 on TiO2 particles was found to be second-order for SO2 and the initial uptake coefficient,BET,was determined to be 1.94 × *** UV and RH=40%,the reaction order was first-order and the initial uptake coefficient was 1.35 × 10-5.
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.
In this paper, a decentralized adaptive fuzzy nonlinear observer is proposed for fault detection of reconfigurable manipulators. Estimation error is obtained from measured and observed velocity is used as the residual...
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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 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.
The development of modern transmission has leaded to transmission gears scuffing becoming more serious. The finite element method (FEM) is proposed that can be used as the most economical and effective designing metho...
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The vehicle side slip angle is an important matter of vehicle stability control, and it is usually obtained by estimation method today. A hybrid observer is proposed to estimate the vehicle side slip angle in this pap...
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ISBN:
(纸本)9787894631046
The vehicle side slip angle is an important matter of vehicle stability control, and it is usually obtained by estimation method today. A hybrid observer is proposed to estimate the vehicle side slip angle in this paper. The hybrid observer includes three parts: a state-space observer, a kinematics integration module and a weight distribution module. The weighting distribution module includes a vehicle stability detection module and a fuzzy controller. We use the phase plane method to detect the stable status of the vehicle. Then, we use the fuzzy controller to calculate the weight of the state-space observer based on the status of the vehicle stability. Through the weight of the state-space observer, the hybrid observer integrates the state-space observer method and kinematics integration method together and makes full use of the advantage of the two methods. And in order to reduce the integration error of the kinematics integration module, we use the Kalman filter to handle the signals that the sensor measured. So, the hybrid observer can work well in the whole area of the tire. The simulation results show that the hybrid observer can achieve the precise estimation results whether the vehicle is in linear area or in the nonlinear area.
A vehicle chassis integrated controller was designed based on the two degrees of freedom vehicle model, developed the active yaw moment distribution optimization algorithm based on the quadratic programming method. Si...
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A vehicle chassis integrated controller was designed based on the two degrees of freedom vehicle model, developed the active yaw moment distribution optimization algorithm based on the quadratic programming method. simulation test by the typical conditions of step steering and single lane steering, the results show that the design of the integrated chassis controller has good control effect can significantly improved vehicle handling stability;development of active yaw moment optimization allocation algorithm can take advantage of the various implementing agencies, to obtain better handling stability of vehicle when the active steering angle and the active braking pressure inputs are smaller.
In the paper, the distributed parameter dynamic model for the system was proposed by Hamilton's principle aimed at multivariable rigid-flexible coupling system of a dual-manipulator cooperative system handling a f...
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