We give a necessary and a sufficient condition that the transfer function of an exponentially stable linear finite-dimensional system be a real positive matrix. The condition does not assume controllability-observability properties.
On the solvability of the positive real lemma equations
โ Scribed by Augusto Ferrante; Luciano Pandolfi
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 143 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0167-6911
No coin nor oath required. For personal study only.
โฆ Synopsis
In this paper, we consider the classical equations of the positive real lemma under the sole assumption that the state matrix A has unmixed spectrum: (A) โฉ (-A) = โ . Without any other system-theoretic assumption (observability, reachability, stability, etc.), we derive a necessary and su cient condition for the solvability of the positive real lemma equations.
๐ SIMILAR VOLUMES
In this paper we deal with special generalizations of the well-known bounded real lemma. We develop general statements for comparison of rational transfer functions in the sense of quadratic forms on the imaginary axis. The main results can be expressed by means of Hamiltonian matrices.
This article concerns peicewise linear systems and determining if they meet given H performance specifications. Such problems occur in control of linear systems with saturation nonlinearities. While one could imagine many mathematically natural piecewise linear systems we took care to extract one wh
This paper presents an explicit non-iterative method for computing the positive real matrices and Youla's spectral factorization of a MIMO SPR system. All the computations are performed based on a minimal state space realization (A, B, C, D) with no restriction on D. The algorithm is tested on a sev