Discrete Observability and Numerical Quadrature

Clyde F. Martin, Xiaochang Wang, Mark Stamp

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We consider the problem of approximate observability of a one dimensional diffusion equation on a finite spatial domain with spatial point measurements. The problem of the optimal selection of the measurement points is considered under three conditions: 1) no preassigned measurement nodes; 2) one preassigned node and; 3) two preassigned nodes. The main observation of this paper is that the optimal choice is intimately related to three classical procedures in numerical analysis: 1) Gaussian quadrature; 2) Radau quadrature and; 3) Lobatto quadrature. We also show that the existence of Radau and Lobatto quadrature is closely related to classical root locus theory.

Original languageEnglish
Pages (from-to)1337-1340
Number of pages4
JournalIEEE Transactions on Automatic Control
Issue number11
StatePublished - Nov 1991


Dive into the research topics of 'Discrete Observability and Numerical Quadrature'. Together they form a unique fingerprint.

Cite this