Vibration Control and Actuation of Large-Scale Systems

Cover
VIBRATION
CONTROL AND
ACTUATION
OF LARGE-SCALE
SYSTEMS
Copyright
Contributors
Preface
Analysis of vibration signals
	Introduction
	Vibration process
	Frequency-frequency analysis
	Analysis of vibration process based on F-F image
		Analysis of vibrations caused by a unbalanced forces of kinematic origin
			Analysis of vibration acceleration of the housing of a 3-phase asynchronous slip-ring motor with p=2 pole pairs
			Analysis of vibration acceleration of the housing of a 3-phase synchronous motor with p=2 salient pole pairs
			Analysis of vibration acceleration of the housing of a 3-phase induction motor with p=1 pole pair
		Analysis of vibrations caused by unbalanced forces of electromagnetic origin
			Analysis of the operating condition of a 3-phase low-speed vertical squirrel cage induction motor with p=3 pole pa ...
			Analysis of the slow-running 3-phase PMSM with an external rotor with p=17 pole pairs, Ns=36 stator teeth and Nr=3 ...
			Analysis of 4-phase SRM operating as a generator with Ns=8 salient stator poles and Nr=6 salient rotor teeth
	Conclusions
	References
Implicit resonances in time-delayed nonlinear systems
	Introduction
		Distinct dynamic behavior
		Key research issues for time-delayed nonlinear systems
		Analytical and numerical methods
	Resonant Hopf bifurcations and coexisting bifurcating solutions
	Implicit resonances in time-delayed nonlinear systems
		Explicit resonances in conventional nonlinear systems
		Implicit resonances in time-delayed nonlinear systems
	Two coexisting families of implicit resonances
		Different families of resonances
		Coexisting superharmonic resonances
		Coexisting subharmonic resonances
		Coexisting additive resonances
	Conclusions
	References
Vibration suppression of force controllers using disturbance observers
	Introduction to force vibrations
		Conventional motion systems
	Observers for motion control
		Observing the disturbances
		Disturbance observer for a DC motor
		Reaction torque observer (RTOB)
	Effects of vibrations in force control
		Force control topology
		Conventional torque control for motors
		RTOB as force sensor
		Isolating vibration effects using the DOB
		Simulation results
	Hardware implementation
		Parameter estimation for DC motor-based force actuators
			Motor torque constant Kt estimation
			Estimation of static friction constant τfric and coefficient of viscous friction B
			Estimation of system inertia (J)
		Experimental setup
		Setup configurations and the results
	Conclusions
	References
Low-complexity controller for active vibration damping of thin mechanical structures
	Introduction
	System description
		Modeling of the piezo-actuated beam
		Problem statement
	Quasipolynomial-based controller design
	Application to the vibration control
	Conclusion
	Acknowledgments
	References
Vibration protection of cultural heritage objects
	Introduction
	The designed isolator
	Experimental results for the full-scale structure
	Mathematical model
		Simplified model
		Expanding the model
		Frequency response functions
	Passive vibration control design
		Inerters
		The isolating system with TMDIs in y-direction
		Equations of motion in presence of TMD
		Effect of the TMDIs on the response of the system
		Optimization of tuning parameters
			Objective functions
		Using inerters in the suspension system
			Inerters in the vertical direction
		Inerters in the horizontal direction
	Experimental tests using manufactured inerter
		Introduction
		Manufactured scaled structure
		Laboratory tests on the scaled model
			Description of the test setup
		Updating the scaled structure's model
		Introducing inerter to scaled structure
			Manufactured inerter
			Experimental results
	Conclusions
	Appendix 1
	Appendix 2
	Appendix 3
	Appendix 4
	Acknowledgments
	References
Static output-feedback vibration control of seismically excited buildings: An effective multistep approach
	Introduction
	Building model
		Second-order dynamical model
		First-order state-space model
		Controlled-output variables and closed-loop model
	H controller design
		State-feedback controller
		Static output-feedback controller
		Iterative design procedure
	Numerical results
		Controller design and frequency-response functions
		Seismic time response
	Conclusions
	Appendix
	References
Finite-time vibration control for vehicle active suspension systems
	Introduction
	System description and preliminaries
		System description
		Preliminaries
	Finite-time state feedback control for suspension systems
		Problem statements
		Design of the finite-time controller
		Comparative experimental studies
	Finite-time output feedback control for suspension systems
		Problem statements
		Main results
		Comparative experimental studies
	Conclusions
	References
Robust adaptive parameter estimation and control for vehicle active suspension systems
	Introduction
	Problem formulation
	Adaptive suspension control design for vertical displacement
		Adaptive control design
		Novel adaptive law
		Stability analysis
		Comparison with other adaptations
			Gradient method
			σ-Modification method
			Proposed method
	Adaptive suspension control for pitch motion
	Suspension performance analysis
	Simulations
	Conclusions
	References
Observer-based robust H vibration control of a half-car active suspension system: A finite-time approach
	Introduction
	System formulation
		System description
		Main definitions and lemmas
	Main results
		FTS analysis
		Finite-time H performance index analysis
		The solution of the vibration controller and observer gains
	Simulation result
	Conclusion
	Acknowledgments
	References
Vibration control of a negative stiffness mechanism-based semiactive seat suspension system
	Introduction
	Seat suspension system with negative stiffness spring
		NSMS
		Controllable rotary damper
	System test and model identification
	Controller design and road input profile generation
	Evaluation
	Summary
	References
Robust fault-tolerant H control of seat suspension systems with quantization
	Introduction
	Problem formulation
	Main results
		Quantized static output-feedback controller design
		Quantized fault-tolerant controller design
	Simulation
	Conclusion
	References
The effects of bending moments on the dynamics of a wind turbine planetary gearbox
	Introduction
	Mathematical modeling of gearbox components
	The results of numerical simulations
		Driving torque only
		Combined loading of driving torque and bending moment with My/Tin=0.5
		Combined loading of driving torque and bending moment with My/Tin=1
		Combined loading of driving torque and bending moment with My/Tin=5
		Under My/Tin=1 with increasing driving torque and bending moment
		Effects of the bearing clearance
	Conclusion
	References
Design of small wind turbine structure with optimized response in frequency domain
	Introduction
	Mechanical design
		Preliminary design
		Prototype of the turbine
	Validation of Fe modeling
		Model testing
		Validation of the FE model
	Optimization of the DAWT
		Finite element modeling
		Optimization of turbine structure
	Conclusions
	Acknowledgments
	References
Index
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