The vibrations of flexible structures are controlled by an optimal modal positive position feedback (OMPPF) algorithm whose control forces are generated by only using modal position signals to provide damping action to undamped structural modes. The suboptimal parameters of the OMPPF controller are
An approximation to optimal modal control
✍ Scribed by Dušan S. Zrnić
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 461 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0005-1098
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✦ Synopsis
An approximation to the optimal modal control in terms of the first, lowest, mode of the distributed system is proposed. It is assumed that the modes occur with different probabilities and the expected value of the usual cost functional is minimized. The piecewise modal approximation as introduced in this paper is optimal for the lowest mode, and approximately optimal for other modes. The overall expected value is still close to the optimal due to the heavy weight put on the lowest mode. Simulation results on a perfectly conducting string stressed by an electric field are presented.
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