Hydraulic Semiactive Vibration Absorbers (SAVA); Separating Myth From Reality

Patten, William; Mo, Changki; Kuehn, J.; Lee, J.; Khaw, C.

doi:10.1016/s1474-6670(17)58564-x

Cited by 5 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the literature is quite extensive and a comprehensive survey is not feasible, applications to structures can be found in Kobori and Kamagata ͑1991͒, while Onodo and Minesugi ͑1996a,b͒ discuss applications to space structures. The work in Sack ͑1994͒ andPatten et al ͑1996͒ shows the benefits in bridge applications, while Bobrow et al ͑2000͒ discuss the benefits in shock absorbers. While earlier devices were primarily hydraulic ͑see, for example, Taylor and Constantinou 1995͒, recent progress in electrorheological and magnetorheological materials has lead to a variety of new semiactive devices employing such materials.…”

Section: Introductionmentioning

confidence: 99%

“…Some are primarily variable stiffness techniques, which may or may not match the semiactive nature of the devices ͑e.g., Leitmann and Reithmeiren 1993;Onodo and Minesugi 1996a;Nagarajaiah 1997 etc.͒. Others devise control logic that explicitly incorporate the semiactive concept ͑e.g., Nemin et al 1994;Patten et al 1996 among many͒. Often, the logic serves as an approximation of a more traditional control technique ͑see Onodo and Minesugi 1996a or the clipped optimal control in Dyke et al 1996.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vibration Suppression with Resettable Device

Jabbari

Bobrow

2002

J. Eng. Mech.

View full text Add to dashboard Cite

Novel low-power or semiactive devices are developed for vibration suppression applications. By manipulating the structural stiffness, the resisting forces generated by the devices are quite large and independent of velocity. Experimental results are presented to demonstrate the feasibility of the devices and to justify the main assumptions used. The critical design issue of device placement is addressed analytically and verified. While much of the development here applies to the case of variable stiffness devices, we focus on resettable devices in which the device behaves like a linear spring. However, at appropriate times, the effective unstretched length of the device is changed-or reset-to extract energy from the vibrating structure.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibration Suppression with Resettable Device

Jabbari

Bobrow

2002

J. Eng. Mech.

View full text Add to dashboard Cite

show abstract

Stability of a Lyapunov Controller for a Semi-active Structural Control System with Nonlinear Actuator Dynamics

Kuehn

Stalford

2000

Journal of Mathematical Analysis and Applications

View full text Add to dashboard Cite

We investigate semi-active control for a wide class of systems with scalar nonlinear semi-active actuator dynamics and consider the problem of designing control laws that guarantee stability and provide sufficient performance. Requiring the semi-active actuator to satisfy two general conditions, we present a method for designing quickest descent controllers generated from quadratic Lyapunov functions that guarantee asymptotic stability within the operating range of the semiactive device for the zero disturbance case. For the external excitation case, Ž bounded-input, bounded-output stability is achieved and a stable attractor ball of . ultimate boundedness of the system is computed based on the upper bound of the disturbances. We show that our wide class of systems covers, in particular, two nonlinear actuator models from the literature. Tuning the performance of the simple Lyapunov controllers is straightforward using either modal or state penalties. Simulation results are presented which indicate that the Lyapunov control laws can be selected to provide similar decay rates as a ''time-optimal'' controller for a semi-actively controlled single degree of freedom structure with no external excitation.

show abstract