Algebraic characterizations are presented for the existence of fixed modes of a linear closed-loop system with decentralized feedback control. The class of controllers for whch tixed modes are present is extended beyond that currently known.

Control systems are often software-intensive applications that are becoming extremely complex as new functionality is required. Complexity is a real engineering challenge and distributed object technology has proved useful for dealing with this problem. Since silicon area becomes cheaper, using CORBA in an embedded system becomes viable. One of the leading technologies in this field is the obje...

and Problem Statement This document is a tutorial on research problems in distributed control for energy systems. It also includes a critique of two examples papers from the area.

We study the large deviations performance of consensus+innovations distributed detection under communication noise. We consider N agents, connected in a generic network; agents sense the environment and communicate over noisy links to detect the event of interest. The agents employ a consensus+innovations distributed detector, which operates as follows. At a time k, agent i first communicates i...

We compute amplitude of deeply virtual Compton scattering in the parton model. We found that the amplitude in the hard regime up to the accuracy O(1/Q) depends on new skewed parton distributions (SPD's). These additional contributions make the DVCS amplitude explicitly transverse. The new SPD's contribute to various spin, charge and azimuthal asymmetries at the same order in 1/Q as the leading ...

One of the most important part of the Distributed Musical Rehearsal project was the evaluation of the overall system performance. This task required the development of precise methodology, based on both subjective and objective performance measurements. The results of the evaluation are presented in the report in their raw form and from these we draw our conclusion concerning the quality, usabi...

Supermarket chains handle frequent deliveries of fresh food to the stores, which have led to the nonignorable high transportation cost. Then a question arises that is it possible to reduce cost by establishing more refrigerated distribution centers (DC)? To answer this question, on basis of data from a large supermarket chain in China, we analyze the decision making process to construct new sub...

Fundamental limitations in decentralized control of systems with multivariable zeros are considered. It is shown that arbitrary bandwidth can be obtained with a stable block-diagonal controller, if certain subsystems of the open-loop system fail to have zeros in the right half-plane and a high-frequency condition holds. Implications on control structure design and sequential loop-closuring meth...

This paper considers the ‘reduction’ problem for large-scale distributed control systems. In particular, we consider control-theoretic concepts for control systems containing multiple instances of identical controllers or components where the overall system is invariant with respect to interchanging these identical components. The main results are invariance of controllability, motion planning ...

Deliverable number D3.1 Title Methodologies for identification and model management of large-scale systems Work package WP3 Multilayer distributed control and model management Due date M22 Actual submission date 09/11/2010 Lead contractor KTH for this deliverable Authors Håkan Hjalmarsson Pavel Trnka Henrik Sandberg <[email protected]...