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Showing 1 to 11 of 11 for “"Periodic disturbance"”.
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Multi-Input Multi-Output Repetitive Control Theory And Taylor Series Based Repetitive Control Design
… to achieve zero tracking error when tracking a periodic command, or when tracking a constant command in the presence of a periodic disturbance, or both a periodic command and periodic disturbance. This dissertation presents a new approach using Taylor Series Expansion of the inverse system …
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An Experimental Investigation of Unsteady Surface Pressure on Single and Multiple Airfoils
… surface pressure on airfoils encountering flow disturbances. Analysis of measurements made on an airfoil immersed in turbulence and comparisons with inviscid theory are presented with the goal of determining the effect of angle of attack on an airfoils inviscid response. Unsteady measurements …
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Application of the Filtered-X LMS Algorithm for Disturbance Rejection in Time-Periodic Systems
Extensive disturbance rejection methods have been established for time-invariant systems. However, the development of these techniques has not focused on application to time-periodic systems in particular until recently. The filtered-X LMS algorithm is regarded as the best disturbance rejection …
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Diffusion in pulsating flow in a conduit
… first refers to flow in a rigid conduit with a periodic disturbance superimposed on a steady mean flow. The second case applies to flow in a distensible tube which is longitudinally constrained, and the steady flow is disturbed by a pulse wave progressing in the direction of flow.
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Savanna Restoration Through Prescribed Fire: Demographic and Physiological Responses of Oak and Hickory Seedlings and Saplings to a Changing Light Environment
… about seedling and sapling response to this periodic disturbance. This study identifies how fire affects community structure and composition of dominant savanna seedlings and saplings, and takes the novel approach of linking conceptually and empirically demographic responses of seedlings and …
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Addressing Stability Robustness, Period Uncertainties, and Startup of Multiple-Period Repetitive Control for Spacecraft Jitter Mitigation
… converge to zero tracking error when executing a periodic command, or when executing a constant command in the presence of a periodic disturbance. The design makes use of knowledge of the period of the disturbance or command, and makes use of the error observed in the previous period to update the …
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Intelligent Neural Network Control System Design and FPGA Based Implementation
… than conventional controllers like PID with a periodic disturbance.</p>
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Optimum design for feedforward structural-acoustic control of complex structural systems
… (ASAC) systems for complex structures and disturbances is presented. The approach consists in a multi-level optimization procedure. The upper level part is carried out in the modal domain, where the optimum modal control forces and modal error sensor components which minimize the total …
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Composition and facies variations in mid-cretaceous gates formation coals, Northeastern British Columbia : implications for interpretation of paleo-wetland environments and assessment of coalbed methane characteristics
… Inertinite formed as a result of fires during periodic drought, and was concentrated by preferential destruction of vitrinite precursors at the peat accumulation stage. Image analysis and point-count petrographic data show that inertinite percentage on average is quite high, and may vary …
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Semi-active damping control for vibration isolation of base disturbances
… damping control for vibration isolation of base disturbances. The aim is to investigate the effectiveness and suitability of semi-active damping control strategies for improving steady-state vibration isolation. A single-degree-of-freedom (SDOF) system, comprising a semi-active damper with a …
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Rejection of periodic disturbances in uncertain nonlinearly perturbed stable infinite dimensional systems
… alone, is developed to reject bandlimited periodic disturbances from the output of a nonlinearly perturbed finite dimensional plant. The stability of the closed loop is obtained via block diagram manipulations and small gain theorem. Next this scheme is shown to be applicable for tracking …