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Exploiting the properties of piezoelectric materials to minimize vibration in rotor-blade actuators, this book demonstrates the potential of smart helicopter rotors to achieve the smoothness of ride associated with jet-engined, fixed-wing aircraft. Vibration control is effected using the concepts of trailing-edge flaps and active-twist. The authors’ optimization-based approach shows the advantage of multiple trailing-edge flaps and algorithms for full-authority control of dual trailing-edge-flap actuators are presented. Hysteresis nonlinearity in piezoelectric stack actuators is highlighted and compensated by use of another algorithm. The idea of response surfaces provides for optimal placement of trailing-edge flaps. The concept of active twist involves the employment of piezoelectrically induced shear actuation in rotating beams. Shear is then demonstrated for a thin-walled aerofoil-section rotor blade under feedback-control vibration minimization. Active twist is shown to be significant in reducing vibration caused by dynamic stall. The exposition of ideas, materials and algorithms in this monograph is supported by extensive reporting of results from numerical simulations of smart helicopter rotors. This monograph will be a valuable source of reference for researchers and engineers with backgrounds in aerospace, mechanical and electrical engineering interested in smart materials and vibration control. Advances in Industrial Control aims to report and encourage the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.
Aeronautics Engineering & Astronautics --- Mechanical Engineering --- Engineering & Applied Sciences --- Rotors (Helicopters) --- Helicopters --- Vibration. --- Copters --- Helicopter rotors --- Rotating aerofoils --- Rotating wings --- Rotors --- Aerofoils --- Aeronautics --- Flying-machines --- Ground-effect machines --- Astronautics. --- Optical materials. --- Aerospace Technology and Astronautics. --- Vibration, Dynamical Systems, Control. --- Optical and Electronic Materials. --- Control and Systems Theory. --- Cycles --- Mechanics --- Sound --- Optics --- Materials --- Space sciences --- Astrodynamics --- Space flight --- Space vehicles --- Aerospace engineering. --- Dynamical systems. --- Dynamics. --- Electronic materials. --- Control engineering. --- Control engineering --- Control equipment --- Control theory --- Engineering instruments --- Automation --- Programmable controllers --- Electronic materials --- Dynamical systems --- Kinetics --- Mathematics --- Mechanics, Analytic --- Force and energy --- Physics --- Statics --- Aeronautical engineering --- Astronautics --- Engineering
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This Brief describes systematically results of research studies on a series of convective heat transfer phenomena from rotating disks in air crossflow. Phenomena described in this volume were investigated experimentally using an electrically heated disk placed in the test section of a wind tunnel. The authors describe findings in which transitions between different heat transfer regimes can occur in dependency on the involved Reynolds numbers and the angle of incidence, and that these transitions could be related to phenomenological Landau and Landau-de Gennes models. The concise volume closes a substantial gap in the scientific literature with respect to flow and heat transfer in rotating disk systems and provides a comprehensive presentation of new and recent results not previously published in book form.
Disks, Rotating. --- Heat -- Transmission. --- Heat exchangers -- Fluid dynamics. --- Mechanical Engineering --- Physics --- Engineering & Applied Sciences --- Physical Sciences & Mathematics --- Thermodynamics --- Mechanical Engineering - General --- Heat exchangers --- Heat --- Fluid dynamics. --- Transmission. --- Heat transfer --- Thermal transfer --- Transmission of heat --- Rotating disks --- Energy transfer --- Centrifugal force --- Plates (Engineering) --- Rotational motion (Rigid dynamics) --- Strains and stresses --- Wheels --- Engineering. --- Hydraulic engineering. --- Engineering Thermodynamics, Heat and Mass Transfer. --- Engineering Fluid Dynamics. --- Machinery and Machine Elements. --- Engineering, Hydraulic --- Engineering --- Fluid mechanics --- Hydraulics --- Shore protection --- Construction --- Industrial arts --- Technology --- Thermodynamics. --- Heat engineering. --- Heat transfer. --- Mass transfer. --- Fluid mechanics. --- Machinery. --- Machinery --- Machines --- Manufactures --- Power (Mechanics) --- Mechanical engineering --- Motors --- Power transmission --- Hydromechanics --- Continuum mechanics --- Mass transport (Physics) --- Transport theory --- Chemistry, Physical and theoretical --- Dynamics --- Mechanics --- Heat-engines --- Quantum theory --- Curious devices
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Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8.Proceedings of the 34th IMAC, A Conference and Exposition on Dynamics of Multiphysical Systems: From Active Materials to Vibroacoustics, 2016, the eighth volume of ten from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: • Processing Modal Data • Rotating Machinery • Vibro Acoustics • Laser Vibrometry • Teaching Practices • Hybrid Testing • Reduced Order Modeling.
Machinery, Dynamics of --- Rotational motion (Rigid dynamics) --- Gyrodynamics --- Revolving bodies --- Rotating bodies --- Dynamics, Rigid --- Engineering. --- Astronautics. --- Vibration. --- Machinery and Machine Elements. --- Aerospace Technology and Astronautics. --- Vibration, Dynamical Systems, Control. --- Cycles --- Mechanics --- Sound --- Space sciences --- Aeronautics --- Astrodynamics --- Space flight --- Space vehicles --- Construction --- Industrial arts --- Technology --- Machinery. --- Aerospace engineering. --- Dynamical systems. --- Dynamics. --- Machinery --- Machines --- Manufactures --- Power (Mechanics) --- Mechanical engineering --- Motors --- Power transmission --- Dynamical systems --- Kinetics --- Mathematics --- Mechanics, Analytic --- Force and energy --- Physics --- Statics --- Aeronautical engineering --- Astronautics --- Engineering --- Curious devices
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The Conference on Traffic and Granular Flow brings together international researchers from different fields ranging from physics to computer science and engineering to discuss the latest developments in traffic-related systems. Originally conceived to facilitate new ideas by considering the similarities of traffic and granular flow, TGF'15, organised by Delft University of Technology, now covers a broad range of topics related to driven particle and transport systems. Besides the classical topics of granular flow and highway traffic, its scope includes data transport (Internet traffic), pedestrian and evacuation dynamics, intercellular transport, swarm behaviour and the collective dynamics of other biological systems. Recent advances in modelling, computer simulation and phenomenology are presented, and prospects for applications, for example to traffic control, are discussed. The conference explores the interrelations between the above-mentioned fields and offers the opportunity to stimulate interdisciplinary research, exchange ideas, and meet many experts in these areas of research.
Mathematics. --- Behavioral sciences. --- Computer mathematics. --- Numerical analysis. --- Amorphous substances. --- Complex fluids. --- Civil engineering. --- Computational Science and Engineering. --- Civil Engineering. --- Soft and Granular Matter, Complex Fluids and Microfluidics. --- Behavioral Sciences. --- Numerical Analysis. --- Granular materials --- Density wave theory. --- Traffic flow --- Fluid dynamics --- Mathematical models. --- Spiral density wave theory --- Galaxies --- Gas dynamics --- Rotating masses of fluid --- Stars --- Waves --- Bulk solids --- Materials --- Computer science. --- Animal behavior. --- Mathematical analysis --- Animals --- Animals, Habits and behavior of --- Behavior, Animal --- Ethology --- Animal psychology --- Zoology --- Ethologists --- Psychology, Comparative --- Engineering --- Public works --- Informatics --- Science --- Behavior --- Complex liquids --- Fluids, Complex --- Amorphous substances --- Liquids --- Soft condensed matter --- Computer mathematics --- Electronic data processing --- Mathematics --- Social sciences. --- Behavioral sciences --- Human sciences --- Sciences, Social --- Social science --- Social studies --- Civilization --- Computer science
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