Global Control of Vibration Using a Tunable Vibration Neutraliser

Tunable vibration neutralisers are currently used to control harmonic vibration of structures at the point at which they are attached, and the way in which the characteristics of the neutralisers influence their effectiveness in this role are reasonably well understood. However, the use of tunable vibration neutralisers to control global vibration of a structure has not been so well explored, and in this article the neutraliser parameters that influence the vibrational kinetic energy of a host structure are highlighted. It is shown that in general a de-tuned rather than a tuned vibration neutraliser is required at most frequencies, offering a stiffness-like or a mass-like impedance to the structure. However, because this control strategy requires a measure of the global vibration of the host structure, which can be difficult and/or costly in practice, it is preferable to use a tuned vibration neutraliser. For this to be effective it is demonstrated that the tuned neutraliser needs to be appropriately positioned on the structure. If this is the case then such a device can be almost as effective as a de-tuned neutraliser over quite a wide range of frequencies.

[1]  Chris R. Fuller,et al.  CONTROL OF AIRCRAFT INTERIOR NOISE USING GLOBALLY DETUNED VIBRATION ABSORBERS , 1997 .

[2]  Philip A. Nelson,et al.  Active Control of Vibration in Structures , 1996 .

[3]  Colin H. Hansen,et al.  Active control of vibration , 1996 .

[4]  P. N. Hobson,et al.  Engineering for profit from waste. Proceedings of the Institution of Mechanical Engineers , 1988 .

[5]  Chris R. Fuller,et al.  Vibration and Noise Control of the Fuselage via Dynamic Absorbers , 1998 .

[6]  D. J. Mead.  Passive Vibration Control , 1999 .

[7]  A. R. Beard,et al.  Adaptive tuned vibration absorbers: Tuning laws, tracking agility, sizing, and physical implementations , 1994 .

[8]  M J Brennan.  Vibration control using a tunable vibration neutralizer , 1997 .

[9]  D. J. Ewins,et al.  Modal Testing: Theory and Practice , 1984 .

[10]  L. A. Pipes.  Matrix methods for engineering , 1963 .

[12]  Chris R. Fuller,et al.  THE EFFECTS OF DYNAMIC ABSORBERS ON THE FORCED VIBRATION OF A CYLINDRICAL SHELL AND ITS COUPLED INTERIOR SOUND FIELD , 1997 .

[13]  M. J. Brennan.  Actuators for active vibration control - tunable resonant devices , 2000 .

[14]  R. H. Thurston,et al.  Scientific Books: Transactions of the American Society of Mechanical Engineers , 1900 .

[15]  Clifford Goodman,et al.  American Society of Mechanical Engineers , 1988 .

[16]  Anders Ågren,et al.  Noise reduction of diesel engines with internal stiffeners , 1993 .

[17]  Robert J. Bernhard,et al.  ADAPTIVE PASSIVE VIBRATION CONTROL , 1996 .

[18]  Philip A. Nelson,et al.  Active Control of Sound , 1992 .

[19]  P. Walsh,et al.  A variable stiffness vibration absorber for minimization of transient vibrations , 1992 .

[20]  M. J. Brennan,et al.  Characteristics of a wideband vibration neutralizer , 1997 .

[21]  Jian-Qiao Sun,et al.  Passive, Adaptive and Active Tuned Vibration Absorbers—A Survey , 1995 .

[22]  M J Brennan,et al.  Design of smart machinery installations to reduce transmitted vibrations by adaptive modification of internal forces , 1998 .

[23]  Robert J. Bernhard,et al.  NON-COLLOCATED ADAPTIVE–PASSIVE VIBRATION CONTROL , 1997 .

[24]  Stephen Barnett,et al.  Matrix Methods for Engineers and Scientists , 1982 .