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This straightforward text, primer and reference introduces the theoretical, testing and control aspects of structural dynamics and vibration, as practised in industry today. Written by an expert engineer of over 40 years experience, the book comprehensively opens up the dynamic behavior of structures and provides engineers and students with a comprehensive practice based understanding of the key aspects of this key engineering topic. Key featuresWorked example based makes it a thoroughly practical resourceAimed at those studying to enter, and already working in indust

Structural dynamics. --- Vibration. --- Cycles --- Mechanics --- Sound --- Building dynamics --- Dynamics, Structural --- Structural vibration --- Strains and stresses --- Structural analysis (Engineering)

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Probabilistic structural dynamics offers unparalleled tools for analyzing uncertainties in structural design. Once avoided because it is mathematically rigorous, this technique has recently remerged with the aide of computer software. Written by an author/educator with 40 years of experience in structural design, this user friendly manual integrates theories, formulas and mathematical models to produce a guide that will allow professionals to quickly grasp concepts and start solving problems. In this book, the author uses simple examples that provide templates for creating of more robust case

Probabilities. --- Structural analysis (Engineering). --- Structural dynamics. --- Structural dynamics --- Structural analysis (Engineering) --- Probabilities --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Civil Engineering --- Probability --- Statistical inference --- Combinations --- Mathematics --- Chance --- Least squares --- Mathematical statistics --- Risk --- Architectural engineering --- Engineering, Architectural --- Structural mechanics --- Structures, Theory of --- Structural engineering --- Building dynamics --- Dynamics, Structural --- Structural vibration --- Strains and stresses --- Engineering

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Modeling and Control of Antennas and Telescopes presents the author’s research and field experience in the area of antenna modeling, dynamics, and control. The required spacecraft tracking accuracy of 1 mdeg was the impetus for the new approaches to the antenna controls that use model based controllers (LQG and H¥ ). Consequently, modeling also required a new approach using system identification techniques. Most of the material presented is new in the telescope industry. The methods have been not only analyzed and tested, but actually implemented, giving confidence in the final result, which is significantly increased antenna pointing accuracy. The author explains two different approaches to telescope modeling: analytical and experimental. The analytical approach combines the structural and drive model, using Matlab and Simulink. The experimental, uses the test data to obtain the equations of the antenna model. Both models are excessively large and the model reduction techniques included make the model size small enough for the controller design purposes. The book also covers the wind models based on the wind tunnel data (steady-state), and on the field data (gusts) since wind gusts are the main antenna disturbance. The book shows the PI and feedforward controller tuning and their performance as a benchmark for measuring the pointing improvement when the LQG and H¥ are implemented. The properties, performance, and tuning of the LQG and H¥ are also presented. The material explains the nonlinear control issues such as velocity and acceleration limits, friction, and backlash. It also covers RF beam control techniques (scanning and monopulse), and the open loop control of the track level unevenness. Modeling and Control of Antennas and Telescopes serves as a useful reference for students and engineers in the area of antenna modeling, dynamics, and control.

Antennas (Electronics) --- Telescopes --- Structural dynamics. --- Control theory. --- Design and construction --- Mathematical models. --- Dynamics --- Machine theory --- Building dynamics --- Dynamics, Structural --- Structural vibration --- Strains and stresses --- Structural analysis (Engineering) --- Astronomical telescopes --- Optical telescopes --- Telescope --- Astronomical instruments --- Optical instruments --- Electronic apparatus and appliances --- Mechanical engineering. --- Mechanics. --- Mechanics, Applied. --- Microwaves. --- Mechanical Engineering. --- Control, Robotics, Mechatronics. --- Solid Mechanics. --- Microwaves, RF and Optical Engineering. --- Astronomy, Observations and Techniques. --- Hertzian waves --- Electric waves --- Electromagnetic waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Quantum theory --- Engineering --- Machinery --- Steam engineering --- Control engineering. --- Robotics. --- Mechatronics. --- Optical engineering. --- Observations, Astronomical. --- Astronomy—Observations. --- Astronomical observations --- Observations, Astronomical --- Mechanical engineering --- Control engineering --- Control equipment --- Control theory --- Engineering instruments --- Automation --- Programmable controllers --- Microelectronics --- Microelectromechanical systems