Experimental Control of Simultaneously Excited Structural Modes.
Abstract
This experiment demonstrated the application of a lower order controller. A cantilever beam's second mode was controlled without decreasing stability in the remaining modes. This was made possible by eliminating observation spillover. Computer simulations were conducted to build control designs and to predict their effectiveness. Modal suppression techniques were used on the first and third modes of a cantilever beam while control was applied to mode two; a three mode model. To measure the effect of the suppression technique, an additional control design based on mode 2 alone was also evaluated. The simulations indicated that the supressed modes control design would decrease the second mode amplitude without affecting the first or third modes. Simulations also showed that the single mode model would decrease mode 2 responses but also decrease mode 1 stability. These predictions were verified experimentally on the cantilevered beam. (Thesis)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1985
- Accession Number
- ADA172378
Entities
People
- Richard L. Wright Jr
Organizations
- Air Force Institute of Technology