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Full-Text Articles in Controls and Control Theory
Attitude Estimation And Control Of Vtol Uavs, Andrew D. Roberts
Attitude Estimation And Control Of Vtol Uavs, Andrew D. Roberts
Electronic Thesis and Dissertation Repository
The theoretical challenge involved in the operation of VTOL UAVs is often divided into two main problems. The first problem involves the development of an estimation scheme which can accurately recover the orientation, or angular position, of the aircraft. The second problem involves the development of algorithms which can be used to reliably control the orientation and/or the position of the vehicle. These two problems are the primary focus of this thesis.
We first consider the problem of attitude estimation. To solve this problem we use vector measurements, and in many cases, a gyroscope (to measure the angular velocity of …
Control And Power Supply For Resistance Spot Welding (Rsw), Meranda Salem
Control And Power Supply For Resistance Spot Welding (Rsw), Meranda Salem
Electronic Thesis and Dissertation Repository
In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high speed, simple mechanism and applicability for automation. RSW has become the predominant means of auto body assembly, resulting in two to six thousands spot welds performed on each manufactured car. In the North American automobile industry there are approximately 100 billion spot welds, which are done every year.
RSW is the joining of two or more metal parts together in a localized area by resistive heating and pressure. Small Scale RSW (SSRSW) is commonly used for medical devices and electronic components, because the welded …
Advances In Internal Model Principle Control Theory, Jin Lu
Advances In Internal Model Principle Control Theory, Jin Lu
Electronic Thesis and Dissertation Repository
In this thesis, two advanced implementations of the internal model principle (IMP) are presented. The first is the identification of exponentially damped sinusoidal (EDS) signals with unknown parameters which are widely used to model audio signals. This application is developed in discrete time as a signal processing problem. An IMP based adaptive algorithm is developed for estimating two EDS parameters, the damping factor and frequency. The stability and convergence of this adaptive algorithm is analyzed based on a discrete time two time scale averaging theory. Simulation results demonstrate the identification performance of the proposed algorithm and verify its stability.
The …