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AbstractTo solve the problems of high idle speed and fuel consumption of wheeled electric drive vehicle on long downhill condition, an anti-drive energy feedback system was designed. The wheeled motors regenerative braking energy was feedback to DC bus and switched from rectifier to inverter module. The synchronous traction generator was driven by inverter as traction motor, which dragging the engine speed to the rated state, and at this time, the throttle was closed. Based on the hierarchical control idea, a three layers control algorithm of anti-drive feedback system, the up layer control algorithm of vehicle state estimation, middle layer of tracking generator rotor frequency and underlying layer of double fuzzy, was put forward. Bench test result showed the anti-drive energy feedback system could provide continuous braking force which equal to 20% of engine power, and save 15% of fuel. The control strategy has good robustness and strong driver intention recognition.Do you want to read the rest of this article?
CitationsCitations0ReferencesReferences10ABSTRACT: The control strategy of the fuel cell-battery-ultracapacitor hybrid electric vehicle's energy system was established. Based on a domestic economy car configuration, the simulation analysis about a refitted fuel cell hybrid electric vehicle was performed using ADVISOR software. The simulation results indicate that using battery and ultracapacitor as the assisted energy system of fuel cell hybrid electric vehicle is feasible and the advantage of it is distinct.Article · Oct 2008 · Energy Conversion and ManagementABSTRACT: Control method for traction control system of conventional internal combustion engine vehicle is not suitable for hybrid electric vehicle. The traction control system of hybrid electric vehicle should be redesigned. Hierarchical traction control system for ISG hybrid electric vehicle was proposed. In the top layer, desired traction total torque calculation strategy was used based on dynamical sliding mode control. In the middle layer, design algorithm of target engine torque based on low pass filtering and dynamic coordinate control strategy based on model matching 2-DOF control were developed. In the bottom layer, exit strategy based on dynamic compensation was proposed. At last, tests of simulation and hardware-in-loop were performed to verify the control system. Results of simulation and test showed that the proposed hierarchical traction control method for ISG hybrid electric vehicle could control the slipped wheels quickly and accurately to realize the traction control function of ISG hybrid electric vehicle effectively.Article · Apr 2011 · Energy Conversion and ManagementABSTRACT: In this paper, coordinating vehicle safety, energy conservation and environmental protection, an Intelligent Hybrid Electric Vehicle (IHEV) which is integrated with advanced technologies of intelligent vehicle and new energy vehicle has been designed. A new hierarchical control structure is proposed and applied into the vehicle control system, and then the vehicle control strategy is evaluated and verified by simulated and experimental analysis. After a brief introduction of IHEV, a particular procedure of the hierarchical control strategy is presented, which includes intelligent driving assistance control object determination layer, total driving/braking torque determination layer, total torque distribution layer and torque coordinate control layer. Many simulations and experiments are carried out by the forward simulation platform and the prototype test vehicle. The simulation and experiment results show, by applying the hierarchy control system to the IHEV, the IHEV can successfully and smoothly realize all of the functions while guarantee the optimal safety, economical performance and driving comfort.Article · Jan 2009 · Energy Conversion and ManagementABSTRACT: By coordinating different chassis control subsystems, integrated vehicle dynamics control (IVDC) can avoid system interferences and thus improve overall vehicle dynamics performance. First, the roadmap and methodologies of IVDC were reviewed, and then the control strategies of coordination between the subsystems were summarized. To further improve vehicle active safety, the integration between steering and braking/traction will still be most concerned in future IVDC study. A typical question can be that, based on the consideration of practical actuator limits and the non-linearity both in tire and vehicle, how to optimally assign the required stabilizing force/moment to each wheel/tire. Particularly, once X-by-wire technology and novel active control systems are widely used, more potential benefits of IVDC can be expected.Article · Jun 2008 ABSTRACT: Based on the hydrostatic and hydraulic auxiliary braking system of tracked vehicle, the hydraulic pump/motor efficiency model according to hydraulic pump/motor performance analysis was set up. The optimal working line in which the hydraulic pump/motor worked at the highest efficiency level was obtained. An energy regenerative braking control strategy was proposed which could lead to the optimal matching of hydraulic coupler, hydraulic pump/motor. The simulation and test results showed that the hydraulic pump/motor could achieve efficient operation, and the energy regeneration efficiency of braking was improved obviously with the regenerative braking control strategy under the safe braking conditions.Article · Feb 2012 +1 more author...ABSTRACT: In this paper, the stationary super-capacitors are used to store a metro network regenerative braking energy. In order to estimate the required energy storage systems (ESSs), line 3 of Tehran metro network is modeled through a novel approach, in peak and off-peak conditions based on the real data obtained from Tehran metro office. A useful method is proposed to predict the maximum instantaneous regenerative energy which is delivered to each station before applying ESS and based on that the ESS configuration for each station is determined. Finally, the effectiveness of the proposed ESS is confirmed by economic evaluations and benefit/cost analyses on line 3 of Tehran metro network. 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优质期刊推荐23.76Kotel'nikov Institute of Radioengineering and ElectronicsAbstractSome questions of using SAR operating at P-band for the Earth's investigations from Space connected with the electromagnetic wave propagation in the ionosphere are discussed. The airborne SAR images show the perspective of using of SAR system operating at the frequencies lower than 1GHz for remote sensing. Estimations of Faraday rotation of polarization plane of the electromagnetic wave in the ionosphere as a function of magnetic latitude and electron density are obtained. Fluctuations of the signal phase and amplitude at the propagation in the ionosphere plasma are considered too.Do you want to read the rest of this article?
CitationsCitations0ReferencesReferences0ArticleJanuary 2001ArticleJanuary 1991ArticleJune 2010The study of precipitation at the observation of the Earth from space is one of the important problems of remote sensing. For the first time the possibility of estimation of rain intensity by upwelling Earth radiation was shown by the experiment conducted on the satellite &Kosmos-243& in 1986. Areas of precipitation falling over sea surface were registered by typical emission of brightness... Conference PaperOctober 1998For the solution of tasks related to radiowave propagation through the atmosphere, it is necessary frequently to know not only average phase delay, but also its fluctuation component. Spatial temporal variations of phase delay of millimeter waves in the troposphere depend on meteorological conditions and create significant restrictions on work of large antennas, long base interferometer... Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.This publication is from a journal that may support self archiving.