Global ETD Search
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Showing 1 to 6 of 6 for “"Modal Reduction"”.
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A unified approach to the formulation of non-consistent rod and beam mass matrices for improved finite element modal analysis
… modes. Finally, a technique for finding the modal reduction mass matrices is proposed. Fully populated modal reduction mass matrices for a rod are successfully extracted. This type of models generate exact natural frequencies and mode shapes for all the extractable modes of a rod problem. …
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Wideband Active Vibration Control Synthesis and Implementation on Uncertain Resonant Structures
… inherent structural damping, and highly-complex modal structure. A myriad of control techniques have been developed to work on this problem with success usually in very small bandwidths related to a specific frequency ``hot-spot'' around a few specific modes. This work describes the design, …
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Structure-acoustic analysis; finite element modelling and reduction methods
… and developed, using substructuring and modal reduction, for the analysis of structure-acoustic problems. The geometric problem domain is divided into a number of subdomains and a reduced set of basis vectors is derived for each of these subdomains. The set of basis vectors for each …
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Active control of sound transmission through plates in a reverberant environment
… sound transmission through the plate. Average reduction of sound pressure level (SPL) on the order of 20 dB or 13 dB are achieved when the plate vibrates at mode (3,1) or (3,3). Microphone sensor locations are shown to influence the controlled sound field, those located where the direct sound …
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Design of Active Structure Acoustic Control Systems Using Eigenassignment Approach
… the vibration amplitude of the structure (modal reduction), as well as changing the vibration distributions of the structure so that the vibration distributions of each structural modes destructively interfere with one another in their associated radiating acoustic field (modal …
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Reduced-order Adaptive Output Predictor for a Class of Uncertain Dynamical Systems: Application to EEG-Based Control of Working Memory
… adaptive output-predictor scheme based on modal reduction and Lyapunov's method. Moreover, the credibility of the proposed reduced-order adaptive output-predictor scheme is validated by mathematical proof, and numerical and experimental studies, such as single pendulum, double pendulum, …