Thesis (MMusPerf)--University of Melbourne, Faculty of the Victorian College of the Arts, 2010. / Typescript. Includes bibliographical references (leaves 53-54)

This study proposes a primarily esthesic, listener-oriented approach to discussing music that is "out of tune" or discordant. The paper is divided into two main sections: in part one I work to define discordance as a type of qualia experienced when a hypothetical listener perceives something as "out of tune." I then present a classification scheme for categorizing different varieties of discordance qualia, based on the perceived intentionality behind discordant events. This system details three primary categories of discordance: 1) incidental, whereby discordance is introduced via a performer's mistake or oversight; 2) expressive, which includes discordances introduced intentionally by a performer; and 3) structural, whereby the discordance is systemic, resulting from factors outside the control of any individual performer. In part two, I present an analytic essay on a movement from Easley Blackwood's 1980 Twelve Microtonal Etudes, a work that invokes structural discordance qualia in listeners enculturated in twelve-tone equal temperament. This analysis explores Blackwood's attempt to mimic functional tonal syntax in nineteen-tone equal temperament, and describes the impact of the structural discordance qualia on familiar varieties of tonal ambiguity. / text

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This thesis describes work completed on the application of H controller synthesis to the design of controllers for single axis high speed independent drive design examples. H controller synthesis was used in a single controller format and in a self-tuning regulator, a type of adaptive controller. Three types of industrial design examples were attempted using H controller synthesis, both in simulation and on a Drives Test Facility at Aston University. The results were benchmarked against a Proportional, Integral and Derivative (PID) with velocity feedforward controller (VFF), the industrial standard for this application. An analysis of the differences between a H and PID with VFF controller was completed. A direct-form H controller was determined for a limited class of weighting function and plants which shows the relationship between the weighting function, nominal plant and the controller parameters. The direct-form controller was utilised in two ways. Firstly it allowed the production of simple guidelines for the industrial design of H controllers. Secondly it was used as the controller modifier in a self-tuning regulator (STR). The STR had a controller modification time (including nominal model parameter estimation) of 8ms. A Set-Point Gain Scheduling (SPGS) controller was developed and applied to an industrial design example. The applicability of each control strategy, PID with VFF, H, SPGS and STR, was investigated and a set of general guidelines for their use was determined. All controllers developed were implemented using standard industrial equipment.

Typescript, etc. / Digitized by Kansas Correctional Industries

Detailed discussion of tuning the classical guitar within the context of equal temperament's development. Alternative models for tuning systems are discussed along with accurate and practical guidelines on how to tune the conventional classical guitar using equal temperament.

En este trabajo, la técnica de control basada en datos "Virtual Reference Feedback Tuning" es tratada de diferentes maneras. Por un lado, las capacidades del método son extendidas con varias propuestas que permiten un uso más amplio del método. Una topología de control alternativa de dos grados de libertad es considerada, así como su aplicación a un controlador proporcional-integral. El caso de múltiples entradas múltiples salidas también se ha abordado mediante la adición de una selección automática de emparejamiento entre las salidas y las variables manipuladas. El método también es aplicado a la topología de Modelo de Control Interno a fin de proponer una prueba de estabilidad robusta basada exclusivamente en datos. Todas estas extensiones se aplicaron a tres casos importantes. En primer lugar, el control de plantas de tratamiento de aguas residuales es considerado. El objetivo de control, en este caso es mantener el efluente de la planta con una baja concentración de contaminantes mientras se trata de consumir la menor cantidad de energía posible. Tanto el caso de múltiples entradas múltiples salidas como el caso descentralizado son utilizados, dando buenos resultados para este sistema complejo. En segundo lugar, la selección de emparejamiento se aplica a una planta basada en celdas de combustible de óxido sólido. La tensión de salida y el exceso de oxígeno se controlan mediante la manipulación del combustible y el flujo de aire. Finalmente, los controladores de dos grados de libertad se aplican a una planta de neutralización del pH mediante el control de la velocidad de flujo de ácido. / In this work the data-driven control technique “Virtual Reference Feedback Tuning” is treated in different ways. In one hand, the capabilities of the method are extended with several proposed variations that allow a wider use of the method. An alternative two degrees of freedom control topology is considered, as well as its application to proportional-integral control. The multiple-inputs multiple-outputs case is also tackled, adding an automatic pairing selection between outputs and manipulated variables. The method is applied to the Internal Model Control topology in order to propose a robust stability test based entirely on data. All these extensions were applied to three important cases. In first place, the control of wastewater treatment plants is considered. The control objective in this case is to maintain the effluent of the plant with a low concentration of pollutants while trying to consume as less energy as possible. Both the multiple-inputs multiple-outputs and the decentralized case are used, yielding good results for this complex system. Second, the pairing selection is applied to a solid-oxide fuel cell plant. The output voltage and the oxygen excess is controlled by manipulating the fuel and the air flow rates. Finally the two degrees of freedom controllers are applied to a pH neutralization plant by controlling the acid flow rate.

This thesis presents an automatic tuning circuit that it is focused on compensation for the filter¡¦s frequency error resulting from the variation of fabrication process, supply voltage and temperature. We utilize a tunable operational transconductance amplifier and a capacitor to form a single-time constant circuit (STC). When we input a reference signal to this circuit, the output of STC circuit can produce a controllable delay time clock. The tuning circuit uses the constant delay time to tune the frequency of the filter. The design of the STC circuit is simple and it has less chip area. All circuits are designed by using the parameters of TSMC 0.35um mixed signal process, and the supply voltage is 3V. The simulation result shows that the filter¡¦s 3-dB frequency error can be controlled by less than 7% as the filter is under the condition of over a range of supply voltages(¡Ó10¢H), operating temperatures(-20 ¢Jto 70¢J ) and five models of SPICE model.

Thesis (M. Soc. Sc.)--University of Hong Kong, 1989.

Thesis (M. Phil.)--University of Hong Kong, 1989.