Due to local resonances, high vibration levels occur frequently in high-speed train floor, which impact on the ride comfort negatively. A method control excessive with multiple dynamic absorbers (DVAs) is presented. Firstly, possible causes of are investigated operational and modal tests. Then a model vehicle body DVAs established based superposition method. It found that strong peak at low fre...

Inspired by the fact that bogies and bottom equipment generally contribute a great deal of aerodynamic drag to high-speed trains, this paper puts forward simple method mounting some small deflectors before and/or after bogie cabins optimize underbody flow reduce trains. The fields train models with without are numerically studied IDDES method. effectiveness further mechanism on reduction analyz...

In the early 1960s the urban area speed limit was increased from 30 to 35 mph in Victoria and NSW. With the introduction of metrication in 1974 the urban area speed limit of 35 mph (56 km/h) was changed to 60 km/h throughout Australia. The reason why 60 km/h was selected is discussed. A study of the likely relationship between travelling speeds and the incidence of pedestrian fatalities was con...

In this paper, we propose a new congestion control scheme for high-speed networks. The basic idea of our proposed scheme is to adopt a game theory called, “Minority Game” (MG), to realize a selective reduction of the transmission speed of senders. More concretely, upon detecting any congestion, the scheme starts a game among all senders who are participating in the communication. The losers of ...

ABSTRACT:The main objectives of any VLSI design are to achieve the low Power, minimum Delay and Area reduction. Minimizing power, delay & area is a challenge in the present situation, but all efforts to achieve one of these can lead to a better design. This paper proposes an EDA tool for low power/ high speed VLSI design, which solves any DFG to estimate the speed of operation and the percentag...

Traffic congestion is usually observed at the upper streams of bottlenecks like tunnels. Congestion appears as stop-and-go waves and high density uniform flow. We perform simulations of traffic flow with a bottleneck using the coupled map optimal velocity model. The bottleneck is expressed as a road segment with speed reduction. The emergence of stop-andgo waves depends on the speed reduction i...

in this paper, the driver with antiwindup and fuzzy high-performance and robust pi controller has been suggested for permanent magnet synchronous motor (pmsm). this controller is suggested for the design of the robust driver for three phase pmsm and the cost reduction of its control system. it’s useful for the industrial application and automation and ultimately speed control and the improvemen...

a prototype of a straw chopper, equipped with a discharge system was designed and fabricated in the department of mechanics of agricultural machinery, university of tehran, karaj, iran. to test for the effective performance of the machine, the effects of such parameters as: drum speed (at three levels of: 400, 540, and 800 rpm), screen size (at two levels: 2.5 and 4 cm), and number of blades on...