scispace - formally typeset
Search or ask a question
Topic

Operating speed

About: Operating speed is a research topic. Over the lifetime, 2259 publications have been published within this topic receiving 23788 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: The proposed control algorithm is applied to the experimental PM motor drive system, in which one digital signal processor is employed to execute the control algorithms, and several drive tests are carried out.
Abstract: This paper aims to improve efficiency in permanent magnet synchronous (PM) motor drives. The controllable electrical loss which consists of the copper loss and the iron loss can be minimized by the optimal control of the armature current vector. The control algorithm of the current vector minimizing the electrical loss is proposed and the optimal current vector can be decided according to the operating speed and the load conditions. The proposed control algorithm is applied to the experimental PM motor drive system, in which one digital signal processor is employed to execute the control algorithms, and several drive tests are carried out. The operating characteristics controlled by the loss minimization control algorithm are examined in detail by computer simulations and experimental results. >

391 citations

Journal ArticleDOI
TL;DR: In this article, a train is modeled as the composition of two subsystems of wheel loads of constant intervals, with one consisting of all the front wheel assemblies and the other the rear assemblies.

359 citations

Journal ArticleDOI
TL;DR: It was found that the transient driving modes were more polluting than the steady-speed driving modes in terms of g/km and g/ sec, indicating that the on-road emission measurement is feasible in deriving vehicle emissions and fuel consumption factors in urban driving conditions.
Abstract: This paper reports on the analysis of on-road vehicle speed, emission, and fuel consumption data collected by four instrumented vehicles. Time-, distance-, and fuel-based average fuel consumption, as well as CO, HC, NOx, and soot emission factors, were derived. The influences of instantaneous vehicle speed on emissions and fuel consumption were studied. It was found that the fuel-based emission factors varied much less than the time- and distance-based emission factors as instantaneous speed changed. The trends are similar to the results obtained from laboratory tests. The low driving speed contributed to a significant portion of the total emissions over a trip. Furthermore, the on-road data were analyzed using the modal approach. The four standard driving modes are acceleration, cruising, deceleration, and idling. It was found that the transient driving modes (i.e., acceleration and deceleration) were more polluting than the steady-speed driving modes (i.e., cruising and idling) in terms of g/km and g/sec. These results indicated that the on-road emission measurement is feasible in deriving vehicle emissions and fuel consumption factors in urban driving conditions.

229 citations

Journal ArticleDOI
TL;DR: The findings showed a 38 percent overall reduction in rear-end crashes for vehicles fitted with AEB compared to a comparison sample of similar vehicles, and areas requiring further research were identified and widespread fitment through the vehicle fleet is recommended.

226 citations

Journal Article
TL;DR: In this article, the relationship between design speed and operating speed is examined through a survey of the practice and a thorough analysis of geometric, traffic, and speed conditions, and the basis for recent changes in speed definitions in the American Association of State Highway and Transportation Officials' (AASHTO's) "A Policy on Geometric Design of Highways and Streets" (Green Book) and the "Manual on Uniform Traffic Control Devices" (MUTCD).
Abstract: This report examines the relationship between design speed and operating speed through a survey of the practice and a thorough analysis of geometric, traffic, and speed conditions. The basis for recent changes in speed definitions in the American Association of State Highway and Transportation Officials' (AASHTO's) "A Policy on Geometric Design of Highways and Streets" (Green Book) and the "Manual on Uniform Traffic Control Devices" (MUTCD) are presented. Researchers should find the data (available on the accompanying CD-ROM) to be very useful in further exploring relationships between roadway factors and operating speed. The report will be of interest to designers and others interested in understanding the factors that affect drivers' speeds.

209 citations


Network Information
Related Topics (5)
Control system
129K papers, 1.5M citations
72% related
Control theory
299.6K papers, 3.1M citations
70% related
Voltage
296.3K papers, 1.7M citations
70% related
Torque
80.7K papers, 707.9K citations
70% related
Energy consumption
101.9K papers, 1.6M citations
70% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202310
202238
202167
202084
201982
201875