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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Automatic control of field machines; engineering, economic and social aspects.

Clark, John Harold. January 1973 (has links)
No description available.
32

The effect of air flow rate and froth thickness on batch and continuous flotation kinetics /

Kaya, Muammer January 1985 (has links)
No description available.
33

Multivariable systems

Hammond, Marvin Harvey. January 1963 (has links)
Call number: LD2668 .T4 1963 H365 / Master of Science
34

A unified approach to controller saturation

許強, Hui, Keung. January 1995 (has links)
published_or_final_version / Mechanical Engineering / Doctoral / Doctor of Philosophy
35

MINIMUM VARIANCE AND INFERENTIAL CONTROL SCHEMES FOR DISTILLATION COLUMNS.

Paz Calles, Douglas. January 1983 (has links)
No description available.
36

A serial to parallel interface for a personal computer controlled solar radiometer

Sutton, Robert Eugene, 1959- January 1988 (has links)
A serial to parallel interface (SPI) has been designed for a personal computer (PC) controlled solar spectroradiometer. The SPI allows for serial RS-232 communication between the radiometer and the PC. The serial data from the PC is converted to discrete, parallel control lines that connect to the various subunits of the radiometer. Data from these subunits are received in parallel at the SPI and converted to serial for transmission to the PC. Pascal programming is used to control all of the radiometer functions including tracking, filterwheel rotation and data gathering.
37

Evolution of system, modelling and control concepts in ancient Greece

Vasileiadou, Soultana January 2002 (has links)
No description available.
38

Nonlinear filtering with application to the bearings only measurement theory

Graham, Angus January 1992 (has links)
No description available.
39

Hybrid modelling and sequence control for a laboratory-scale rolling mill

Ibrahim, Muhammad January 2002 (has links)
No description available.
40

Robust Control of an Induction Motor Drive

Mosskull, Henrik January 2006 (has links)
This thesis considers robust control of an induction motor drive, consisting of an input filter, a voltage source inverter and one or several induction motors in parallel. The motor torque is here controlled by using the method Indirect Self Control (ISC), and power oscillations between the inverter and the input filter are damped by means of a stabilization controller in an outer feedback loop. Closed-loop performance with ISC is analyzed under the assumption of a stiff inverter input voltage. It is shown how parameter errors influence the torque loop and the conclusion is that the motor leakage inductance should not be overestimated, especially not with a large desired control bandwidth. It is also shown that model errors enhance cross coupling, but that the performance is quite insensitive even to large parametric errors. Based on the closed-loop model, expressions for the controller parameters are derived to obtain required stability margins. For design of the stabilization controller to suppress oscillations between the inverter and the input filter, it is shown that the effects of time delays and limited torque (or current) control bandwidth are important and cannot be neglected. From models including these non-ideal properties of the control system, explicit expressions for stabilization controllers to use with ISC as well as field-oriented control (FOC) are derived. This is valuable as stabilization often is designed through costly and time-consuming manual tuning. In the controller design, the trade-off between tight torque control and stability of the DC-link is also explicitly considered. In this way reasonable stability margins are obtained, while minimizing the negative effects on torque control. Stability of the closed-loop drive with the proposed stabilization is validated through realistic hardware-in-the-loop simulations using real control HW and SW. Using models obtained from frequency domain system identification, stability of the non-linear closed-loop drive is verified by combining stability results for linear systems with the small gain theorem for the non-linear model errors. This thesis considers the input filter dynamics in connection with torque control of an induction motor. The key result is a model-based framework for simultaneous treatment of DC-link stability and efficient torque control. / QC 20100913

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