Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 93 for “"speed control"”.
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Hydroelectric System Analysis and Speed Control Optimization
Made available in DSpace on 2014-12-08T22:24:21Z (GMT). No. of bitstreams: 1 6808272.pdf: 2917420 bytes, checksum: e08c84fb6c901274b105aafcaf033cc8 (MD5) Previous issue date: 1967
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Peripheral Transverse Pavement Markings for Speed Control
In the United States, speeding is considered to be a contributing factor in about 30 percent of fatal crashes (US DOT, 2000). In an attempt to reduce speeds on roadway segments where speed is considered to be a safety concern, various low cost countermeasures have been investigated. Such …
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Designing and modeling a torque and speed control transmission (TSCT)
… multiple power inputs/outputs.;The Torque and Speed Control Transmission (TSCT) is a combination of a planetary geartrain and a Continuously Variable Transmission (CVT). By combining these two types of power transmission devices, a new transmission is created that has much greater flexibility. …
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Influence of accelerator pedal force feedback on truck drivers' speed control
… real-world conditions, rather than strictly controlled test track conditions. Analysis of the behaviour of the two drivers also identified differences is styles, and explained 7% fuel consumption differences between the two drivers when negotiating roundabouts. A new mathematical model of the …
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Optimal-efficiency constant-speed control of nonlinear variable reluctance motor drives
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Exploring the Considerations of School Zone Speed Control in Traffic Signal Timing
School zone speed control is a crucial safety intervention that assists in slowing down traffic and warning drivers to pay more attention to vulnerable road users. This restriction may result in impacts on arterial traffic operations, including speed reduction and potentially additional stops at …
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Simulation of speed control brushless DC motor using gaussian fuzzy logic controller
This paper presents a control scheme of a Fuzzy Logic for the brushless direct current (BLDC) motor drives. The BLDC motor has some advantages compare to others type of motors. However, the nonlinearity of this motor drive characteristics cause it is difficult to handle using conventional …
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Analysis Of A Dual Scissored-Pair,variable-Speed, Control Moment Gyroscope Driven Spherical Robot
… offset based designs of spherical robots to control moment gyroscope (CMG) based designs in order to determine which approach is most effective. The first objective was to develop a list of current state of the art designs in order to gain an overall understanding of what the obstacles in …
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Splined Speed Control using SpAM (Speed-based Acceleration Maps) for an Autonomous Ground Vehicle
There are many forms of speed control for an autonomous ground vehicle currently in development. Most use a simple PID controller to achieve a speed specified by a higher-level motion planning algorithm. Simple controllers may not provide a desired acceleration profile for a ground vehicle. Also, …
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Advanced Speed Control Strategies to Reduce Delay and Improve Safety of Car-Truck Mixed Traffic Flow
This study develops an advanced speed control strategy called “differential variable speed limit (DVSL)”. DVSL assigns different speed limits for car and truck, and it also varies speed limits based on traffic conditions. The study tested the impacts of DVSL on delay and safety for a section of the …
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Heat pump simulation model and optimal variable-speed control for a wide range of cooling conditions
… map. The map defines the optimal evaporator fan speed, condenser fan speed and compressor speed needed to achieve the lowest total power consumption for the given cooling rate, ambient and zone temperature.
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Development Of A Motor Speed Control System Using Matlab And Simulink, Implemented With A Digital Signal Processor
… and Simulink are described in detail. A motor control system design served to demonstrate the efficacy of this new method. Initial data was collected to help model the motor in Simulink. This allowed for the design of the open and closed loop control systems. The designed system was very …
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A Study of the Effectiveness of Unmanned Radar as a Speed Control Technique in Freeway Work Zones
… these efforts are actively pursued. Excessive speed is often a contributing factor to work zone accidents. One method of speed control in work zones is the deployment of unmanned, or drone, radar transmitters, to simulate and supplement police presence in work zones. A review of the literature …
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Analysis and design of a novel controller architecture and design methodology for speed control of switched reluctance motors
This paper presents a novel controller architecture and speed control design methodology suitable for low cost, low performance switched reluctance motor drives. By utilizing inexpensive components in a simple, compact architecture, a low cost controller is developed which achieves a performance …
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GPScheDVS: A New Paradigm of the Autonomous CPU Speed Control for Commodity-OS-based General-Purpose Mobile Computers with a DVS-friendly Task Scheduling
… merely predicts and enforces the lowest CPU speed that can meet tasks' deadlines without meddling with task scheduling. This research, however, shows that it is impossible to take full advantage of DVS in balancing energy/power and performance in the current DVS paradigm due to the mismatch …
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Zigbee based wireless adjustable speed drive system
This thesis proposes a remotely controlled motor drive system which is able to supply a regulated voltage for both DC and AC motors. The proposed system integrates two different technologies, each of which belongs to the field of wireless communications and semiconductor power electronics. The …
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Effects of display type and steering force feedback on performance in a medium-fidelity driving simulator
… performance data were collected (lane deviation, speed control, steering wheel angle variance, and time to the complete course) as well as subjective self-report measures including questionnaires designed to tap immersive tendencies and perceived levels of presence. Results of the research show …
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The field oriented control of a permanent magnet synchrounous motor (PMSM) by using fuzzy logic
… of operation, design considerations and control algorithms of the field oriented control (FOC) for a permanent magnet synchronous motor (PMSM) drive system of Fuzzy Logic Controller (FLC) and proportional-integral PI for speed control in closed loop operation. To perform speed control of …
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Controle de motor de indução de média tensão em aplicação de bombeio submarino
This work presents a study of sensorless speed control by field orientation considering the use of a three-phase induction motor fed through long cables through subsea umbilicals. For this study, the adopted electrical model reproduces a system that is used to drive a subsea pump in offshore oil …
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