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Hirohisa Tanaka Professor Hideyuki Wada Researcher 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1995,24(4):365-376
This paper presents a fuzzy control system for the clutch engagement of an automated manual transmission. The servomechanism is assembled with a three-port pneumatic pressure-proportional valve and a position-sensing cylinder which control the release-lever displacement of 25 mm within the position preciseness of 0.1 mm against maximum spring load of 2kN. The fuzzy system is skillful to estimate the driver's will from the accelerator pedal operation. The servomechanism is mounted on a commercial vehicle with 4-ton pay-load. The system parameters are set up by bond graphs simulation and empirical performance tests are carried by using an oil-hydraulically operated engine-vehicle testing rig with a maximum torque capacity of 400 Nm. 相似文献
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Association of Senior Scientists Technicians China Academy of Railway Sciences 《现代城市轨道交通》2010,(6):5-8
针对北京市轨道交通建设施工安全问题,通过调研,具体对38起地铁施工安全事故相关案例进行解剖,总结已建地铁所发生的各类事故经验教训,分析地铁工程的风险来源、性质、发生规律和事故发生的原因,提出轨道交通建设施工安全的相关建议,旨在减少或避免轨道交通工程类似事故的发生。 相似文献
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Ahmed Alloum Post doctoral Researcher 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1997,27(3):187-219
In this paper we present results obtained for a driving advice system developed, within the framework of the Prometheus program. The main results concern the vehicle modelling, which is required for the evaluation of the vehicle's dynamic behaviour in real-time, and the safety parameters considered and developed in order to evaluate the vehicle's safety state. The demonstrator is briefly presented, together with the results. 相似文献
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Andrzej Maslowski Dr habil. Associate Professor J zef Krutul MSc Senior Researcher 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1984,13(6):357-366
In this paper a method of analysis of vehicle head-on collision, based on the concept of dispersion of stress waves in rods upon axial impact has been presented. The mathematical model of collision studied here described the vehicle behaviour in collision in terms of a one-dimensional, nonhomo-geneous, nonlinear partial differential equation. A procedure of model identification and some remarks concerning experimental data have been discussed. Results of computer simulation of a tested vehicle have been given. 相似文献
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Anil Dhir Senior Project Engineer Seshadri Sankar President 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1997,27(1):37-63
This paper outlines various analytical approaches of varying complexities to model the wheel in the ride dynamic formulation of off-road tracked vehicles. In addition to a proposed model, four analytical models available in the literature are compared to study their effectiveness in modeling the wheel/track-terrain interaction for ride dynamic evaluation of typical high mobility tracked vehicles. The ride dynamic model used in this study describes the bounce-pitch plane motion of an armoured personnel carrier (Ml 13 APC) traversing over an arbitrary rigid terrain profile at constant speed. The ride dynamic response of the tracked vehicle is evaluated with different wheel models, and compared against field-measured ride data. The relative performance of different wheel models are assessed based on the accuracy of response prediction and associated computational time. The proposed wheel model is found to perform very well in comparison, and is equally applicable for the case of wheeled vehicles. 相似文献
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Istv n Kuti Senior Researcher 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1998,30(1):37-54
In the research and design of vehicles, the accurate simulation of their dynamic behaviour is often of interest. Therefore, on the one hand, the non-linear properties of suspensions and tyres may not be neglected. On the other hand, the application of large mechanical models is necessary in order to get correct information about the local dynamic behaviour of critical parts or elements of vehicles. With regard to these requirements, in this paper, a special computational procedure is presented for the non-linear dynamic analysis of vehicles using large finite element models. Correctness, in comparison to COSMOS/M commercial finite element program, and applicability of the presented procedure is shown by the use of a bus finite element model containing 2214 degrees of freedom. 相似文献
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R. R. Guntur Senior Research Associate J. Y. Wong Professor Director 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1980,9(3):149-180
In this paper a simulation model of tractor-semitrailers suitable for design and performance analysis of anti-lock systems is presented. The model is used to evaluate the effects of various methods of prediction and reselection of the anti-lock system on the braking performance of tractor-semitrailers. The characteristics and the equivalent control logic of a commercially available anti-lock system are examined and its deficiencies are identified. To rectify these deficiencies, improved methods of prediction and reselection are proposed. A comparison of the slip characteristics and braking effectiveness between the proposed and the commercially available systems is made. The effects of various types of control logic on the steerability and directional stability of tractor-semitrailers and on the air consumption of the brake systems will be examined in a separate paper. 相似文献
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A. G. Thompson Visiting Senior Research Fellow 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1977,6(1):37-40
The yaw rate response for a two-degree-of-freedom car model requires a family of curves for different degrees of oversteer or understeer. By use of non-dimensional co-ordinates this family is reduced to one single curve. The ordinate ρ is the ratio of yaw rate response to that of a neutral steering car at the same speed and is less than 1 for understeer and greater than 1 for oversteer. Since ρ is also the ratio of the side-slip angle response it is hence, a unique measure of the steady-state steering characteristics. 相似文献
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