Journal ArticleDOI
An active truss element and control law for vibration suppression
TLDR
In this paper, an active truss element and control law is used along with a compressible fluid in order to dissipate energy during the motion of the structure, but the energy is not absorbed in the same manner as conventional viscous damper.Abstract:
In order to meet the demands of simplicity and reliability in active control systems for flexible structures, an inexpensive active truss element and control law has been developed in this research. A decentralized switching control law is used along with a compressible fluid in the truss element in order to dissipate energy during the motion of the structure. However, the energy is not absorbed in the same manner as a conventional viscous damper. The truss element retains its maximum stiffness, but has a reset-able nominal unstressed length. Energy is absorbed in the working fluid of the truss element through heat transfer to the environment when the nominal length is reset at the proper switching times. The control law is insensitive to changes in structural parameters such as mass, stiffness, and damping. In this paper, a mathematical model for the system is presented along with a stability analysis and experimental results.read more
Citations
More filters
Journal ArticleDOI
Fundamental properties of reset control systems
TL;DR: This paper considers more general reset structures than previously considered, allowing for higher-order controllers and partial-state resetting, and gives a testable necessary and sufficient condition for quadratic stability and links it to both uniform bounded-input bounded-state stability and steady-state performance.
Journal ArticleDOI
Plant with integrator: an example of reset control overcoming limitations of linear feedback
TL;DR: Conditions under which linear feedback control of a plant containing integrator must overshoot are given and an example of reset control that does not overshoot is given.
Journal ArticleDOI
Resetting semiactive stiffness damper for seismic response control
TL;DR: In this article, a general resetting control law based on the Lyapunov theory is proposed for an RSASD, and the performance of such a resetting controller and of a switching control method are investigated through extensive numerical simulations using different types of earthquake excitations.
Journal ArticleDOI
Vibration suppression with resettable device
Faryar Jabbari,James E. Bobrow +1 more
TL;DR: In this paper, a low-power or semi-active device is developed for vibration suppression applications by manipulating the structural stiffness, the resisting forces generated by the devices are quite large and independent of velocity, and the critical design issue of device placement is addressed analytically and verified.
Journal ArticleDOI
On Horowitz's contributions to reset control
TL;DR: In this paper, the authors present recent theoretical and experimental results on reset control, which was directly motivated by Horowitz's pioneering work on reset controllers in the 1970s, and show that with qualitative design, they can exhibit better performance trade-offs than those in linear, time-invariant systems.
References
More filters
Proceedings ArticleDOI
Control of seismic-excited buildings using active variable stiffness systems
TL;DR: Active variable stiffness (AVS) systems have been demonstrated to be effective in response control of buildings subjected to earthquake excitations based on the theory of variable structure system (VSS) or sliding mode control (SMC).
Journal ArticleDOI
Semiactive control of a vibrating system by means of electrorheological fluids
George Leitmann,E. Reithmeier +1 more
TL;DR: In this paper, a semi-active controller is proposed for the suppression of vibratory motion of a dynamical system, where the spring and damping coefficients can be varied within prescribed bounds, albeit not independently.
Proceedings ArticleDOI
Electrorheological dampers and semi-active structural control
TL;DR: In this paper, a decentralized bang-bang control strategy is derived to minimize the rate at which energy from the disturbance is transferred to the structure, which requires feedback of the ER damper deformation rates and feedforward of a disturbance signal.
Book ChapterDOI
Dynamic Intelligent Buildings - Active Seismic Response Control
T. Kobori,S. Kamagata +1 more
Proceedings ArticleDOI
Semiactive control of civil engineering structures
W.N. Patten,R.L. Sack +1 more
TL;DR: In this paper, the effectiveness of low power, inexpensive semiactive control hardware to provide vibration attenuation, for structures, is explored, and a dynamic model of a semiactive actuator is developed.