The purpose of this paper is to examine the problem of controlling a linear time-invariant system subject to input saturation in order to have its output track (or reject) a family of reference (or disturbance) signal...
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The purpose of this paper is to examine the problem of controlling a linear time-invariant system subject to input saturation in order to have its output track (or reject) a family of reference (or disturbance) signals produced by some external generator. It is shown that a semi-global framework for this problem is a natural one. Within this framework, a set of solvability conditions are given and feedback laws which solve the problem are constructed. The theory developed in this paper incorporates earlier results established for linear systems without input saturation.< >
We consider the problem of simultaneous finite gain L/sub p/-stabilization and internal stabilization of linear systems subject to input saturation via linear static state feedback. We show that bounded input finite-g...
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We consider the problem of simultaneous finite gain L/sub p/-stabilization and internal stabilization of linear systems subject to input saturation via linear static state feedback. We show that bounded input finite-gain L/sub p/-stabilization and local asymptotic stabilization can always be achieved simultaneously no matter where the poles of the open loop system are, and the locations of these poles play a role only when bounded input finite gain L/sub p/-stabilization and global or semi-global stabilization are required simultaneously.< >
This paper presents a simultaneous H/sub 2//H/sub /spl infin// optimal control problem for discrete-time systems in the state-feedback case. By the use of dynamic state feedback controllers, the design seeks to minimi...
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This paper presents a simultaneous H/sub 2//H/sub /spl infin// optimal control problem for discrete-time systems in the state-feedback case. By the use of dynamic state feedback controllers, the design seeks to minimize the H/sub 2/ norm of a closed-loop transfer matrix while simultaneously satisfying a prescribed H/sub /spl infin// norm bound on some other closed-loop transfer matrix. The class of problems addressed here is relatively general and consists of systems which have left invertible transfer function matrix from the control input to the controlled output. Necessary and sufficient conditions are established so that the posed simultaneous H/sub 2//H/sub /spl infin// problem is solvable with state feedback controllers.
In this paper, the parallel implementations of two well-known linear state-space filtering algorithms, namely the Kalman and the Lainiotis filters, in MIMD machines are studied from a computational standpoint. The ana...
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In this paper, the parallel implementations of two well-known linear state-space filtering algorithms, namely the Kalman and the Lainiotis filters, in MIMD machines are studied from a computational standpoint. The analysis assumes both time invariant and time varying system models and uses precedence graphs and critical paths. The parallelism efficiency of the implementations is also defined and studied. Results indicate that these algorithms can be implemented in parallel using a comparatively small number of processors. Furthermore, the efficiency of the parallel implementations can be very high or very low, depending on the state and measurement vector dimensions.
作者：
SKOLNICK, DHSKOLNICK, ADavid H. Skolnickhas practiced naval engineering in both government and industry. He has supported the Military Sealift Command and the Naval Sea Systems Command Ship Design Group and Amphibious Ship Acquisition Program Office
participating in the design and assessment of ship structure evaluation of intact and damaged stability and arrangements during design and construction phases of acquisition conversion and overhaul. He is currently involved in systems engineering and integration. Recent responsibilities have included requirements analyses and feasibility studies interface analyses and computer aided analyses. He received his B.S. in naval architecture and marine engineering from Webb Institute of Naval Architecture in 1982 (as an ASNE scholar) and is currently an M.S. candidate in systems engineering at the University of Virginia. Alfred Skolnickserved over 30 years as an engineering duty officer and retired from the Navy with the rank of captain in 1983. His early assignments included tactical missile engineering
shipboard duty and Polaris submarine inertial navigation. He later served in the Deep Submergence Systems Project was project director
surface effect ships (SES) David Taylor Model Basin director of technology
Joint Navy-Commerce SES Program director
combat systems Naval Sea Systems Command and project manager directed energy weapons. His awards include the Navy League's Parsons Award in 1979 for scientific and technical progress ASNE's Gold Medal in 1981 for high energy laser development the Navy Legion of Merit in 1983 National Capital Engineer of the Year in 1986 and the American Defense Preparedness Association Gold Medal in 1988 for contributions to strategic defense. He was president of ASNE from 1985–1989. He received his B.S. in mathematics from Queens College his M.A. in mathematics from Columbia University his M.S. in electrical engineering from U.S. Naval Postgraduate School and his Ph.D. in electrical engineering/applied mathematics from Polytechnic University. He w
Changing threat requirements and radical budget shifts imply that Navy operational needs will broaden and engineering solutions will face tougher constraints. Existing and emerging technology promise increased combat ...
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Changing threat requirements and radical budget shifts imply that Navy operational needs will broaden and engineering solutions will face tougher constraints. Existing and emerging technology promise increased combat capability in smaller packages;space-based assets will allow operator orchestration of widely dispersed naval units via connectivity attributes previously unavailable. Tactical data relay by downlink may permit reallocation of responsibilities among several platforms, space, air, or seaborne, so ships can be outfitted for custom-use (sensing, unique data processing, high-firepower) and optimized to meet specific mission needs. These evolving capabilities demand a fresh look at ship concepts and prospective force structures consistent with global and fiscal realities. Warfighting performance formerly unknown in small ship design may offer a very effective solution to the intricate, interacting issues of falling defense budgets, diverse operational requirements and complex national priorities. Multimission ships which take advantage of new or current technology to reduce ship size, manning and cost could be affordable in sufficient numbers to meet our continuing worldwide obligations, complement our larger ships' force structure, and produce a balanced fleet. These same ships could satisfy U.S. maritime needs beyond the Navy and improve export trade through foreign military sales (FMS).
作者：
PACE, DKVLAHOS, MThe Author The Author is a member of the Principal Professional Staff of The Johns Hopkins University Applied Physics Laboratory (APL). From 1987 to 1989
he was APL's resident liaison with the Naval War College where as an adjunct professor he developed an elective course on technology and naval warfare as well as serving as analytic lead for the Technology Initiative Games. He teaches in the graduate technical management curriculum of the Whiting School of Engineering at The Johns Hopkins University. As a specialist in operations research and systems analysis his professional responsibilities include leadership roles in the Military Operations Research Society the Summer Computer Simulation Conference the American Society of Engineering Management and membership on the ASNE JournalCommittee. His undergraduate studies were in mathematics and physics at the University of Chicago and his graduate studies in theology at several seminaries with a decade as a correctional chaplain.
The world has changed dramatically in the past few years. In large part, many of the changes have been driven by the emphasis now given to contingency and limited war operations. Navy leadership even coined a special ...
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The world has changed dramatically in the past few years. In large part, many of the changes have been driven by the emphasis now given to contingency and limited war operations. Navy leadership even coined a special term for them late in the 1980s: CALOW (Contingency and Limited Objective Warfare). As a result, naval planning has also changed, and with it so have the demands upon naval engineering. This paper addresses some of the factors that are now shaping naval planning. Characteristics of contingency and limited war operations are presented. Their implications for naval planning, for naval systems, for concepts of employment, and for naval force structure are examined. It is important that both Navy leadership and the naval engineering community understand these implications fully so that they may respond to them appropriately. The specific value of this paper lies in its synthesis of information so that the naval engineering community may appreciate the full impact of future contingency and limited war operations.
Existing fault tolerance schemes have often been ignored by systolic array designers because they are too costly and unwieldy to implement. With this in mind, we have developed a new technique specially tailored for r...
The weighted checksum technique has been demonstrated to be effective in multiple error detection. It has been shown that, in order to guarantee error detection, the chosen weight vectors must satisfy some very specif...
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