The search of a proper relaxation procedure in the sense that relaxed minimiz-. ers can be approximated with ordinary controls for optimal control problems involving delays in the control variables has been the main topic of several recent papers. Three models of relaxation, which we call the weak,
A characterization of relaxed controls with commensurate delays
โ Scribed by J.F Rosenblueth
- Book ID
- 104350007
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 328 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0893-9659
No coin nor oath required. For personal study only.
โฆ Synopsis
The question of how to properly relax optimal control problems involving arbitrary commensurate delays in the controls was studied in a recent paper by characterizing, in terms of projections of a common probability measure, the weak star closure of the space of ordinary controls. In this paper, we provide a characterization where the common probability measure is assumed to be a measurable measure-valued function. Also, we study some implications of this characterization and show how a well-known result, whose traditional role has been to provide a definition of conditional expectations, can be applied to these problems.
๐ SIMILAR VOLUMES
In previous papers Warga and Zhu have proven the conjecture of Rosenblueth and Vinter that a particular abstract model characterizes the set แฌ of relaxed ลฝ . controls that are limits of ordinary controls with possibly time-dependent delays. Rosenblueth and Vinter have also provided a simple and conc
## Abstract With communication signal delays, a power system control can actually excite sustained oscillations. This paper proposes a method to analyze the stability of such delayed systems and the like. The stability is estimated using delay margins. The main result is nicely based on a sufficien