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Aircraft Engineering and Aerospace Technology, 1962
MODERN turbojet engines have a shaft speed range of approximately 2 to 1 (from ground idle to take‐off) and it is necessary, therefore, to have some form of infinitely‐variable‐ratio gearbox to obtain a constant speed for accessories such as a.c. generators.
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MODERN turbojet engines have a shaft speed range of approximately 2 to 1 (from ground idle to take‐off) and it is necessary, therefore, to have some form of infinitely‐variable‐ratio gearbox to obtain a constant speed for accessories such as a.c. generators.
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Aggressive Driving and Speeding
2018Abstract Purpose: This chapter synthesises a variety of findings on the topic of aggressive driving and delivers a suite of strategies for moderating such behaviours. Examples and formal definitions of aggressive driving acts are given, along with specific techniques for reducing excessive speed and other aggressive behaviours.
Kara Kockelman, Jianming Ma
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Effect of Driving Speed on Reaction Time During Motorway Driving
Accident Analysis and Prevention, 1995 Effects of driving speed (70, 90 and 110 km/h) on subsidiary auditory reaction time were studied during car driving on a motorway with a speed limit of 110 km/h. Driving distance was held constant at about 200 km. Twenty-four subjects participated in a repeated-measurement design. Reaction time was found to be slower at 70 km/h than at 110 km/h. Before
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A Study on Speeding Driving Based on Expected Speed
ICCTP 2009, 2009In the recent years, in china, speeding is one of the most serious road traffic violations and is one of the main reasons that cause road traffic accidents. In 2007, the road traffic accident fatalities caused by speeding account for 14.06% of the total, ahead of the main reasons for the accident, so the treatment of speeding is the main task of the ...
Chen Hu, Xiaoduan Sun, Shicui Liu
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Driving speed profiles for autonomous vehicles
2017 IEEE Intelligent Vehicles Symposium (IV), 2017We show that driving speed profiles with high spatial resolution can be constructed using large samples of GPS data collected from vehicle fleets, consumer navigation devices, and smart phones. Such historical speed profiles are expected to help adaptive cruise control systems or autonomous vehicles navigate in a manner consistent with the way people ...
Anton Anastassov +2 more
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On the High Speed Capacity of Bearingless Drives
IEEE Transactions on Industrial Electronics, 2014With soaring raw material costs, the need for smaller drives running at higher speeds is ever increasing. In parallel, magnetic bearings and bearingless drives have outgrown the purely academic level and are the state of the art solution for several industrial processes.
Hubert Mitterhofer +2 more
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Electrical Drives for Wide Speed Ranges
Transactions of the American Institute of Electrical Engineers, 1942THE electrical drive for a wide speed range is obtained by the addition of a rotating regulator called a Rototrol to a conventional variable voltage system. This combination will give a speed range of 120 to 1 or more, and can be used effectively in many industries to simplify the mechanical design of the machine which it drives.
G. A. Caldwell, W. H. Formhals
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Variable Speed Drives Evaluation Test
IEEE Industry Applications Magazine, 1998Testing of variable speed drives is not yet subject to standards, although motor drives with the same general design may differ significantly in performance. Tests of efficiency, harmonic content, immunity to voltage sags and capacitor switching are developed and applied to a collection of 3 hp and 20 hp 480 V drives.
E.G. Strangas, V.E. Wagner, T.D. Unruh
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A wide-range adjustable-speed drive
Electrical Engineering, 1949This paper describes the theory and characteristics of a drive which provides a wide range of adjustable speeds. The ratio of the maximum to minimum useful speeds attainable is approximately 20-to-1. The system provides high starting-torque, relatively high efficiencies and rapid deceleration through regenerative braking.
A. G. Conrad, E. R. Tribken
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Driving simulator validation for speed research
Accident Analysis & Prevention, 2002The behavioral validation of an advanced driving simulator for its use in evaluating speeding countermeasures was performed for mean speed. Using mature drivers, 24 participants drove an instrumented car and 20 participants drove the simulator in two separate experiments.
Stuart T, Godley +2 more
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