Technology of Semiactive Devices and Applications in Vibration Mitigation

Casciati, Fabio; Magonette, Georges; Marazzi, Francesco

doi:10.1002/0470022914

Cited by 112 publications

(132 citation statements)

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“…In control applications, voltage (or current) is the control variable Yoshioka et al (2002); Dyke et al (1996); Sahasrabudhe and Nagarajaiah (2005); Casciati et al (2006); Jansen and Dyke (2000). This is why it is important to validate the model with a varying voltage input along with a varying displacement.…”

Section: Validation Results With Varying Voltagementioning

confidence: 99%

Modeling and identification of a small scale magnetorheological damper

Aguirre¹,

Ikhouane²,

Rodellar³

et al. 2010

IFAC Proceedings Volumes

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Magnetorheological (MR) dampers are promising vibration control devices widely used for vibration mitigation applications as they combine reliability and stability of passive systems while maintaining versatility of active devices without large power requirements. These dampers are intrinsically nonlinear, so one of the challenging aspects of applying this technology is the development of accurate models to describe their behaviour for control design and evaluation purposes. This paper deals with the parametric identification of a small scale MR damper which is modelled using the viscous + Dahl model. Experimental results show reasonably good agreement with the forces predicted by the identified model.

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Section: Validation Results With Varying Voltagementioning

confidence: 99%

Modeling and identification of a small scale magnetorheological damper

Aguirre¹,

Ikhouane²,

Rodellar³

et al. 2010

IFAC Proceedings Volumes

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“…More mathematical treatments of nonlinear control topics can be found in Sastry (1999), Isidori (1995), Fradkov et al (1999) and Krstić et al (1995). Semi-active control methods are discussed by Casciati et al (2006) and Preumont and Seto (2008). A good discussion on velocity feedback and other linear techniques is given by Preumont (1997).…”

Section: Chapter Notesmentioning

confidence: 99%

Control of Nonlinear Vibrations

Wagg

Neild

2014

Nonlinear Vibration With Control

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In this chapter, methods which can be used to control nonlinear structural vibrations are discussed. Introductory examples showing the control of linear and nonlinear single-degree-of-freedom oscillators have already been discussed in Sect. 1.4 of Chap. 1. This chapter extends the ideas presented in these introductory examples to a range of controllers, which can be designed to control nonlinear vibrations. Control of structural vibrations is different from the majority of control problems, in that there are typically multiple lightly damped resonances in the system response. In addition, when an actuator is attached to the structure, its effect will be coupled to some resonances much more strongly than others. As a result, careful design is required to reduce particular resonant responses. Even with careful design, other resonances will exist which cannot be effectively controlled. Using feedback can induce instability in the system, and so ensuring the stability of any control design is of primary importance. The underlying ideas of stability for nonlinear systems have been introduced in Sect. 2.3, Chap. 2. In this chapter, these ideas are extended to include systems with feedback control, and the stability analysis is carried out using a particular type of potential function, called a Lyapunov function. The basic ideas of Lyapunov-based control design can be extended to a range of other approaches. The main control method described here is the effective linearisation of a system using feedback. Adaptive control, which can also be a useful method for nonlinear or uncertain systems is also discussed in the later part of the chapter.

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“…For these reasons, in last few years, special attention has been given to semiactive systems which are still based on feedback control schemes, but require much simpler technology and actuators. Besides, they can work with a small amount of energy, including the possibility of operating with batteries [2].…”

Section: Introductionmentioning

confidence: 99%

“…This control law requires the continuous measurement of the structure acceleration and the velocity of the TMD, being different from other proposals that demand the measurement of displacements. The blocking of the inertial mass was implemented by using a solution based on a Magneto-Rheological (MR) damper, which seems to be a very interesting device and recently gained a certain popularity in the Structural Control area [2]. This paper gives particular attention to the experimental tests of the semi-active system performed before being installed in the footbridge, as well as to the control system implementation and the analysis of the vibration levels of the structure over last few years, including the period without control, with the passive TMD and with the semi-active TMD.…”

Section: Introductionmentioning

confidence: 99%