Book•
Vibration Control of Active Structures
31 Jan 1997-
About: The article was published on 1997-01-31 and is currently open access. It has received 811 citations till now. The article focuses on the topics: Active vibration control & Torsional vibration.
Citations
More filters
TL;DR: In this paper, the authors proposed the use of a novel type of passive vibration control system to reduce vibrations in civil engineering structures subject to base excitation, based on the inerter, a device that was initially developed for high-performance suspensions in Formula 1 racing cars.
Abstract: SUMMARY: This paper proposes the use of a novel type of passive vibration control system to reduce vibrations in civil engineering structures subject to base excitation. The new system is based on the inerter, a device that was initially developed for high-performance suspensions in Formula 1 racing cars. The principal advantage of the inerter is that a high level of vibration isolation can be achieved with low amounts of added mass. This feature makes it an attractive potential alternative to traditional tuned mass dampers (TMDs). In this paper, the inerter system is modelled inside a multi-storey building and is located on braces between adjacent storeys. Numerical results show that an excellent level of vibration reduction is achieved, potentially offering improvement over TMDs. The inerter-based system is compared to a TMD system by using a range of base excitation inputs, including an earthquake signal, to demonstrate how the performance could potentially be improved by using an inerter instead of a TMD. © 2013 John Wiley & Sons, Ltd.
493 citations
TL;DR: A critical review of the different chatter suppression techniques can be found in this paper, where the evolution of each technique is described remarking the most important milestones in research and the corresponding industrial application.
454 citations
TL;DR: In this paper, the robustness of positive-position feedback control of flexible structures with colocated force actuators and position sensors is investigated using the theory of negative-imaginary systems, which can be extended to nonlinear systems through the notion of counterclockwise input-output dynamics.
Abstract: This paper investigates the robustness of positive-position feedback control of flexible structures with colocated force actuators and position sensors. In particular, the theory of negative-imaginary systems is used to reveal the robustness properties of multi-input, multi-output (MIMO) positive-position feedback controllers and related types of controllers for flexible structures. The negative-imaginary property of linear systems can be extended to nonlinear systems through the notion of counterclockwise input-output dynamics.
269 citations
Cites background or methods from "Vibration Control of Active Structu..."
...The use of a controller of this form when applied to a flexible structure with force actuators and position sensors is referred to as integral resonant control, or integral force control [1], [13], [14]....
[...]
...Open-loop techniques for highly resonant systems, such as input shaping [1], as well as closed-loop techniques, such as damping augmentation [2], [3], can be used for this purpose....
[...]
...Velocity sensors can be used in negative-velocity feedback control, whereas position sensors can be used in positive-position feedback [1], [7], [8], [11]–[14]....
[...]
...Colocated control with velocity measurements, called negative-velocity feedback, can be used to directly increase the effective damping, thereby facilitating the design of controllers that guarantee closed-loop stability in the presence of plant parameter variations and unmodeled dynamics [1], [4]....
[...]
...In particular, the theory of negative-imaginary systems [9], [10] is used to reveal the robustness properties of multi-input, multi-output (MIMO) positive-position feedback controllers and related types of controllers for flexible structures [1], [11]– [14]....
[...]
TL;DR: In this article, a beam undergoing longitudinal and transverse motion and a periodic array of piezoelectric patches with electrodes connected to a resonant electric circuit are employed for the design of a tunable, one-dimensional metamaterial.
Abstract: Periodic shunted piezoelectric patches are employed for the design of a tunable, one-dimensional metamaterial. The configuration considered encompasses a beam undergoing longitudinal and transverse motion, and a periodic array of piezoelectric patches with electrodes connected to a resonant electric circuit. The resulting acousto-electrical system is characterized by an internal resonant behavior that occurs at the tuning frequency of the shunting circuits, and is analogous in its operation to other internally resonating systems previously proposed, with the addition of its simple tunability. The performance of the beam is characterized through the application of the transfer matrix approach, which evaluates the occurrence of bandgaps at the tuning frequencies and estimates wave attenuation within such bands. Moreover, a homogenization study is conducted to illustrate the internal resonant characteristics of the system within an analytical framework. Experiments performed on the considered beam structure validate the theoretical predictions and illustrate its internal resonant characteristics and the formation of the related bandgaps.
241 citations
TL;DR: In this article, a general description of smart material systems is given, focusing on the following fields of application: semi-passive concepts, energy harvesting, semi-active concepts, active vibration control and active structural acoustic control.
233 citations
Cites background from "Vibration Control of Active Structu..."
...[105,106] compared the force feedback and acceleration feedback implementation of a sky hook damper used to isolate a flexible structure from a disturbance source....
[...]
References
More filters
TL;DR: In this paper, a new technique for vibration suppression in large space structures is investigated in laboratory experiments on a thin cantilever beam, which makes use of generalized displacement measurements to accomplish vibration suppression.
Abstract: A new technique for vibration suppression in large space structures is investigated in laboratory experiments on a thin cantilever beam. This technique, called Positive Position Feedback, makes use of generalized displacement measurements to accomplish vibration suppression. Several features of Positive Position Feedback make it attractive for the large space structure control environment: The realization of the controller is simple and straightforward. Global stability conditions can be derived which are independent of the dynamical characteristics of the structure being controlled, i.e., all spillover is stabilizing. The method cannot be destabilized by finite actuator dynamics, and the technique is amenable to a strain-based sensing approach. The experiments control the first six bending modes of a cantilever beam, and make use of piezoelectric materials for actuators and sensors, simulating a piezoelectric active-member. The modal damping ratios are increased by factors ranging from 2 to 130.
783 citations
TL;DR: A robust stability test and associated design procedure based on the positivity of operators, assuring global stability when the loop is closed by negative feedback is proposed, and can be extended to nonlinear systems.
Abstract: A robust stability test and associated design procedure based on the positivity of operators is proposed. The test does not rely on modal truncation or high-order truth models of the structure and is independent of the numerical values of the modal data. The stability criterion is applied to the plant (structure) and the controller individually, assuring global stability when the loop is closed by negative feedback. Therefore, design/stability evaluations need only iterate on the low-order controller part of the loop. The method can be extended to nonlinear systems.
207 citations
TL;DR: In this article, a truss structure with two active elements that can be placed in various locations is presented, each of the active elements consists of a linear piezoelectric actuator collocated with a force transducer.
Abstract: This paper summarizes a research in the field of active damping of space structures. The test facility consists of a truss structure provided with two active elements that can be placed in various locations. Each of the active elements consists of a linear piezoelectric actuator collocated with a force transducer. Each active element is controlled in a decentralized manner, with an integral feedback of the force on the voltage applied to the piezoactuator. This control law is always stable and has been found very effective; the damping ratio of the first mode has been increased from 0.003 (open loop) to 0.09 with one actuator.
174 citations
TL;DR: In this article, the root perturbation technique is used to predict the behavior of the total system, assuming that the controller is allowed to modify only moderately the natural modes and frequencies of the structure.
Abstract: The novel idea presented is based on the observation that if a structure is controlled by distributed systems of sensors and actuators with limited authority, i.e., if the controller is allowed to modify only moderately the natural modes and frequencies of the structure, then it should be possible to apply root perturbation techniques to predict analytically the behavior of the total system. Attention is given to the root perturbation formula first derived by Jacobi for infinitesimal perturbations which neglect the induced eigenvector perturbation, a more general form of Jacobi's formula, first-order structural equations and modal state vectors, state-space equations for damper-augmented structures, and modal damping prediction formulas.
170 citations
TL;DR: In this paper, a cylindrical mast with two orthogonal bending modes was constructed using four small piezoelectric ceramic strain transducers as sensors and drivers, the driver for each loop being on the opposite side of the mast from the sensor.
Abstract: Electronic damping was applied to two orthogonal bending modes in a cylindrical mast. The mast was a 377-g hollow fiberglass cylinder 66 cm long with a 4.3 cm outer diameter and a wall thickness of 0.23 cm. The bottom of the mast was rigidly attached to a large shaker plate, while the top end had a 1500-g inertial mass attached. The two lowest modes of the structure were the two orthogonal first-order bending modes. They had closely spaced resonant frequencies of 33.85 and 34.12 Hz. Although the mechanical Q of each mode was high (500), the modes were just barely separable in a frequency scan. Two orthogonal damping loops were constructed using four small (25.4x6.35x0.28 mm) lightweight (0.4 g) piezoelectric ceramic strain transducers as sensors and drivers, the driver for each loop being on the opposite side of the mast from the sensor. The mast mode orientations were not aligned with the damping transducers. Despite the closeness of the modal frequencies and the nonoptimal orientation of the damping loops, a decrease of over 30 dB in the peak amplitudes of the two modes was demonstrated. The behavior of the experimental setup agrees remarkably well with the theoretical predictions of a mathematical model developed by C.J. Swigert in an accompanying paper.
121 citations