Journal ArticleDOI
Control of large-scale dynamic systems by aggregation
TLDR
Using the quantitative definition of weak coupling proposed by Milne, a suboptimal control policy for the weakly coupled system is derived and questions of performance degradation and of stability of such suboptimally controlled systems are answered.Abstract:
A method is proposed to obtain a model of a dynamic system with a state vector of high dimension. The model is derived by "aggregating" the original system state vector into a lower-dimensional vector. Some properties of the aggregation method are investigated in the paper. The concept of aggregation, a generalization of that of projection, is related to that of state vector partition and is useful not only in building a model of reduced dimension, but also in unifying several topics in the control theory such as regulators with incomplete state feedback, characteristic value computations, model controls, and bounds on the solution of the matrix Riccati equations, etc. Using the quantitative definition of weak coupling proposed by Milne, a suboptimal control policy for the weakly coupled system is derived. Questions of performance degradation and of stability of such suboptimally controlled systems are also answered in the paper.read more
Citations
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Journal ArticleDOI
Computer aided design of suboptimal lqg controller
Robert E. Skelton,A. Yousuff +1 more
TL;DR: An interactive software package for the design of a suboptimal controller is proposed and an example is included to establish the need for this package.
Journal ArticleDOI
Decentralized Suboptimal Approach to the Control of Large- Scale Systems@@@الوصول لحاكم لا مركزي شبه مثالي للأنظمة الكبيرة المقياس
TL;DR: In this article, the authors proposed the finite moving horizon (MH) technique for the suboptimal decentralized linear quadratic problems, which is based on a finite stage solution of the Riccati difference equation.
Proceedings ArticleDOI
Reduced order modelling and state estimation applied to gas distribution systems
J. Parkinson,R.J. Wynne +1 more
TL;DR: In this article, a reduced order model for complex, multi-feed gas networks has been developed which is based on an aggregation procedure, and the reduced model is then used with an estimation scheme to determine the pressure distribution in the network from a limited number of measurements.
Journal ArticleDOI
Entwurf eines Teilzustandsreglers mit Hilfe der Ordnungsreduktion / Design of a partial state feedback controller using order reduction
TL;DR: In this article, an explicite analytically closed and unique solution for the desired partial state feedback controller is obtained, which uses only a part of the state vector for feedback.
Proceedings ArticleDOI
Optimal Control Design of Large Scale Systems with Uncertainty
TL;DR: Developing a reduced order model and using it in the design procedure will alleviate the problem of large dimensions, and such design is used to obtain an approximate design for the full order system.
References
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Journal ArticleDOI
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