Telemaze : a feedback control system for the remote positioning of a distant exploratory vehicle /

"UIUCDCS-R-74-683"

The analysis and compensation of nonlinear sampled-data feedback systems.

"Research was supported by the United States Air Force through the Air Force Office of Scientific Research, Air Research and Development Command."

FAA BCAS concept /

Issued Apr. 1978.

Assessment of the capacity of the automated radar terminal systems (ARTS IIIA) for the years 1980-1990 /

Mode of access: Internet.

Peace by committee : command and control issues in multinational peace enforcement operations /

Originally presented as thesis at School of Advanced Airpower Studies, Air University, 1993-94.

Business systems: a basic college textbook.

Mode of access: Internet.

Optimal pseudo-derivative-feedback control/

Thesis (M.S.)--Cornell University, Jan., 1975.

Executive-controlled adaptive systems,

At head of title: Microwave Research Institute, Polytechnic Institute of Brooklyn, Systems and Controls Group, R-688-58, PIB-616, contract no. DA-30-069-ORD-1560.

Third annual evaluation report : National Institute of Standards and Technology, Personnel Management Demonstration Project.

Mode of access: Internet.

Strategic plan for federal human resources management.

Mode of access: Internet.

A comparative evaluation of alternative systems for the provision of effective access to periodical literature : a report to the National Commission on Libraries and Information Science /

Mode of access: Internet.

Strategic command, control, and communications : alternative approaches for modernization /

Item 1005-C

Digital processes for sampled data systems.

Includes bibliography.

Audit Information Management System (AIMS).

"This material was compiled by the Audit Division, National Office for Orientation of Management Officials in the national, regional and district offices of the Audit Information Management System (AIMS)."

Robust multivariable control of complex biological processes

This paper addresses advanced control of a biological nutrient removal (BNR) activated sludge process. Based on a previously validated distributed parameter model of the BNR activated sludge process, we present robust multivariable controller designs for the process, involving loop shaping of plant model, robust stability and performance analyses. Results from three design case studies showed that a multivariable controller with stability margins of 0.163, 0.492 and 1.062 measured by the normalised coprime factor, multiplicative and additive uncertainties respectively give the best results for meeting performance robustness specifications. The controller robustly stabilises effluent nutrients in the presence of uncertainties with the behaviour of phosphorus accumulating organisms as well as to effectively attenuate major disturbances introduced as step changes. This study also shows that, performance of the multivariable robust controller is superior to multi-loops SISO PI controllers for regulating the BNR activated sludge process in terms of robust stability and performance and controlling the process using inlet feed flowrate is infeasible. (C) 2003 Elsevier Ltd. All rights reserved.