Browsing by Subject "Decentralized systems"

Now showing 1 - 4 of 4

Open Access
A distance-limited continuous location-allocation problem for spatial planning of decentralized systems
(Elsevier, 2017) Gokbayrak, K.; Kocaman, A. S.
We introduce a new continuous location-allocation problem where the facilities have both a fixed opening cost and a coverage distance limitation. The problem has wide applications especially in the spatial planning of water and/or energy access networks where the coverage distance might be associated with the physical loss constraints. We formulate a mixed integer quadratically constrained problem (MIQCP) under the Euclidean distance setting and present a three-stage heuristic algorithm for its solution: In the first stage, we solve a planar set covering problem (PSCP) under the distance limitation. In the second stage, we solve a discrete version of the proposed problem where the set of candidate locations for the facilities is formed by the union of the set of demand points and the set of locations in the PSCP solution. Finally, in the third stage, we apply a modified Weiszfeld's algorithm with projections that we propose to incorporate the coverage distance component of our problem for fine-tuning the discrete space solutions in the continuous space. We perform numerical experiments on three example data sets from the literature to demonstrate the performance of the suggested heuristic method.
Open Access
Large decentralized continuous-time convex stochastic teams and their mean-field limits
(Institute of Electrical and Electronics Engineers Inc., 2024-07-12) Sanjari, Sina; Saldı, Naci; Yuksel, Serdar
We study a class of continuous-time convex stochastic exchangeable teams with a finite number of decision makers (DMs) as well as their mean-field limits with infinite numbers of DMs. We establish the existence of a globally optimal solution and show that it is Markovian and symmetric (identical) for both the finite DM regime and the infinite one. In particular, for a general class of finite-N exchangeable stochastic teams satisfying a convexity condition, we establish the existence of a globally optimal solution that is symmetric among DMs and Markovian. As the number of DMs drives to infinity (that is for the mean-field limit), we establish the existence of a possibly randomized globally optimal solution and show that it is symmetric among DMs and Markovian.
Open Access
On algebraic properties of general proper decentralized systems
(Elsevier, 1993) Yu, R.; Sezer, M. E.; Gao, W.
The new concepts of the decentralized output feedback variable polynomial, the decentralized output feedback cycle index of general proper systems, and the geometric multiplicities of decentralized fixed modes are introduced. Their computational methods and some algebraic properties are presented. It is shown that the decentralized output feedback cycle index of a general proper system is equal to one when the system has no fixed modes or equal to the maximum of the geometric multiplicities of its decentralized fixed modes. It is also shown that almost all decentralized output feedback can be used to make the zeros of the decentralized variable polynomial distinct, and disjoint from any given finite set of points on the complex plane.
Open Access
PI and low-order controllers for two-channel decentralized systems
(IEEE, 2003-06) Gündeş, A.N.; Özgüler, A. Bülent
A systematic design method is proposed for simple loworder decentralized controllers in the cascaded form of proportional-integral and first-order blocks. The plant is linear, time-invariant and has two channels, each with a single-input and single-output; there may be any number of poles in the region of stability, but the unstable poles can only occur at the origin.