Abstract
The idea of using the distributed-order differential equation first proposed by Caputo in (1969) is at least mathematically interesting as demonstrated in the previous chapters. However, people may question its usefulness in engineering practice. In this chapter, we included two generic applications. One is on distributed order signal processing and the other is on optimal distributed damping. We hope these two initial applications can serve as motivating examples to further the investigation in distributed order dynamics systems, signal processing, modeling and controls.
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- 1.
It follows from the residue of \(\frac{\mathrm{ e}^{st}(s^{-a}-s^{-b})}{\ln (s)}\) which equals zero at \(s=\infty \), that the path integral of it along \(s\rightarrow \infty \) is vanished for \(b\le 1.\)
- 2.
When \(s=0\), DC gain of \(\int _a^b\frac{1}{(s+\lambda )^\alpha }\mathrm{ d}\alpha =\int _a^b\frac{1}{\lambda ^\alpha }\mathrm{ d}\alpha =\frac{1}{\ln \lambda }\left(\frac{1}{\lambda ^a}-\frac{1}{\lambda ^b}\right)\). So, unity gain requires gain scaling factor \(\frac{\lambda ^{a+b}\ln \lambda }{\lambda ^b-\lambda ^a}.\)
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Jiao, Z., Chen, Y., Podlubny, I. (2012). Distributed-Order Filtering and Distributed-Order Optimal Damping. In: Distributed-Order Dynamic Systems. SpringerBriefs in Electrical and Computer Engineering(). Springer, London. https://doi.org/10.1007/978-1-4471-2852-6_4
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DOI: https://doi.org/10.1007/978-1-4471-2852-6_4
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