Design Methods for Machinery Emulators
Abstract
The realization of electromechanical dynamic systems possessing specified input-output dynamic properties is studied. Applications of this problem include the scaled shock and vibration testing of machinery and the design of electromechanical filters. A two-step realization process was developed by which both passive and active systems can be realized. Two techniques have been developed to obtain realizable models for the design of passive mechanical systems. The first technique involves searching the parameterized space of congruent coordinate transformations relating input-output equivalent second order models for those that are realizable, i.e., those that can be directly interpreted as a network of mechanical elements. The second technique involves estimating realizable models which include both distributed and lumped mechanical elements directly from experimental machinery data. Active emulation is achieved by adding vibration sources, e.g., shakers, to the passive structure. These sources are driven under closed-loop control so as to produce the desired level of vibration at the output locations. Experimental evaluation of these techniques has been carried out through the design of a modular machinery emulator, which can be adapted to match the mass and dynamic properties of a desired machine within a frequency range of interest.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 27, 2004
- Accession Number
- ADA421133
Entities
People
- Pierre E. Dupont