Adaptive periodic disturbance cancellation in a set-up of two cryocoolers

Rijpma, A.P. and Verberne, J.F.C. and Wtbreuk, E.H.R. and Bruins, P.C. and Brake ter, H.J.M. (1998) Adaptive periodic disturbance cancellation in a set-up of two cryocoolers. Journal of Sound and Vibration, 217 (3). pp. 419-434. ISSN 0022-460X

PDF
Restricted to UT campus only: Request a copy
370Kb

Abstract:	The work presented describes adaptive periodic disturbance cancellation as applied to the vibration of two cryocoolers. The coolers are driven by linear motors. The periodic input signal necessary to reduce the disturbance is calculated by vibration measurements using the systems frequency response. It is subsequently added to the drive voltage. This leads to a complete disturbance rejection in only one control step. The experimental results show excellent convergence within the limits of the vibration sensor resolution. A method of vibration control is thus described that is not only capable of reducing the vibrations at the drive frequency of the coolers, but also at multiple harmonics. For example, this means the vibrations are reduced from 1 and 0.2 ms-2to 0.02 and 0.01 ms-2, respectively for the various moving elements.
Item Type:	Article
Copyright:	© 1998 Elsevier
Faculty:	Science and Technology (TNW)
Research Group:	Energy, Materials and Systems (EMS)
Link to this item:	http://purl.utwente.nl/publications/73822
Official URL:	http://dx.doi.org/10.1006/jsvi.1998.1810
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 128386