Results 141 to 150 of about 3,309,056 (196)
Some of the next articles are maybe not open access.
Active Vibration Damping in Beams
1989 American Control Conference, 1989The traveling wave approach is discussed of the active vibration control of beam. First an active vibration control for the TIMOSHENKO-beam is designed using external control forces. Then vibration control by means of internal forces. i.e. force systems forming equilibrium groups is discussed. Finally an unexpected resonance phenomenon occuring in this
P. Hagedorn, J. Wallaschek, P. Chen
openaire +1 more source
Electrohydraulic Active Damping System
CIRP Annals, 2005A major characteristic of machine tools is the relative dynamic flexibility at the tool centre point. Poorly damped resonance frequencies often cause self-excited vibrations, so called chatter vibrations, which derogate the machined surface and may cause tool breakage.
C. Brecher, A. Schulz, M. Week
openaire +1 more source
Active damping in HDD actuator
2000 Asia-Pacific Magnetic Recording Conference. Digests of APMRC2000 on Mechanical and Manufacturing Aspects of HDD (Cat. No.00EX395), 2001One of the limitations inherent in high-track-density hard disk drive design is the effect of actuator mechanical resonant modes on the head-positioning servo. The first servo bandwidth limiting mode is the so-called "butterfly mode," which is the major mode in the head mechanical transfer functions and can not be avoided through mechanical design.
null Fu-Ying Huang +3 more
openaire +1 more source
Active Damping of Driveline Oscillation
IFAC Proceedings Volumes, 2004Abstract This controller approach describes a method for active damping of torsional vibrations in a vehicle driveline during clutch engagement. The problem of oscillations appears in a wide range of drivelines equipped with an automated clutch capacity controller, e.g. continuously variable automatic transmission (CVT), automated manual transmission
Andreas Schwenger +3 more
openaire +1 more source
Arrangement for active sound damping
The Journal of the Acoustical Society of America, 1996It is known in the state of the art to dampen noise emissions by means of "anti-sound". In the gas exhaust installations of combustion machines, this is realized most often in that the exhaust gas flowing in the gas exhaust installation is charged with "anti-sound" produced by loudspeakers (12).
openaire +1 more source
Active Control for Vibration Damping
1988Active control laws are developed for an LSS-type structure to damp vibrations. High frequency modelling uncertainties lead to the necessity for a robust control design. The Linear Quadratic Gaussian with Loop Transfer Recovery (LQG/LTR) control design technique is a particular robust design technique selected for use in designing a damping control ...
P. J. Lynch, Siva S. Banda
openaire +1 more source
Active vibration damping system
The Journal of the Acoustical Society of America, 2009A system (100, 200, 300) for damping vibrations of a vibratory structure (104, 308). The damping system includes an active damper (112, 124, 128, 216), a vibration sensor (116, 208, 208A′-C′), and a controller (120, 212) for controlling the active damper in a manner that damps vibration of the vibratory structure. In some embodiments, the active damper
openaire +1 more source
Active Damping with Collocated System
2011The use of collocated (and dual) actuator and sensor pairs, for a lightly damped flexible structure, always leads to alternating poles and zeros near the imaginary axis, Fig.7.1. In this chapter, we use this interlacing property to develop Single Input-Single Output (SISO) active damping schemes with guaranteed stability.
openaire +1 more source
Active damping with collocated pairs
1997The role of damping in the gain stabilization of a control system in the roll-off region has been pointed out in the foregoing chapter. The damping also reduces the settling time of the transient response to impulsive loads. Indeed, since the modal expansion of the impulse response matrix corresponding to (2.19) is $$ g\left( \mathcal{T} \right) = \
openaire +1 more source