On design of quantized fault detection filters with randomly occurring nonlinearities and mixed time-delays

This paper is concerned with the fault detection problem for a class of discrete-time systems with randomly occurring nonlinearities, mixed stochastic time-delays as well as measurement quantizations. The nonlinearities are assumed to occur in a random way. The mixed time-delays comprise both the multiple discrete time-delays and the infinite distributed delays that occur in a random way as well. A sequence of stochastic variables is introduced to govern the random occurrences of the nonlinearities, discrete time-delays and distributed time-delays, where all the stochastic variables are mutually independent but obey the Bernoulli distribution. The main purpose of this paper is to design a fault detection filter such that, in the presence of measurement quantization, the overall fault detection dynamics is exponentially stable in the mean square and, at the same time, the error between the residual signal and the fault signal is made as small as possible. Sufficient conditions are first established via intensive stochastic analysis for the existence of the desired fault detection filters, and then the explicit expression of the desired filter gains is derived by means of the feasibility of certain matrix inequalities. Also, the optimal performance index for the addressed fault detection problem can be obtained by solving an auxiliary convex optimization problem. A practical example is provided to show the usefulness and effectiveness of the proposed design method

Energy Harvesting Wireless Communications: A Review of Recent Advances

This article summarizes recent contributions in the broad area of energy harvesting wireless communications. In particular, we provide the current state of the art for wireless networks composed of energy harvesting nodes, starting from the information-theoretic performance limits to transmission scheduling policies and resource allocation, medium access and networking issues. The emerging related area of energy transfer for self-sustaining energy harvesting wireless networks is considered in detail covering both energy cooperation aspects and simultaneous energy and information transfer. Various potential models with energy harvesting nodes at different network scales are reviewed as well as models for energy consumption at the nodes.Comment: To appear in the IEEE Journal of Selected Areas in Communications (Special Issue: Wireless Communications Powered by Energy Harvesting and Wireless Energy Transfer

Gossip Algorithms for Distributed Signal Processing

Gossip algorithms are attractive for in-network processing in sensor networks because they do not require any specialized routing, there is no bottleneck or single point of failure, and they are robust to unreliable wireless network conditions. Recently, there has been a surge of activity in the computer science, control, signal processing, and information theory communities, developing faster and more robust gossip algorithms and deriving theoretical performance guarantees. This article presents an overview of recent work in the area. We describe convergence rate results, which are related to the number of transmitted messages and thus the amount of energy consumed in the network for gossiping. We discuss issues related to gossiping over wireless links, including the effects of quantization and noise, and we illustrate the use of gossip algorithms for canonical signal processing tasks including distributed estimation, source localization, and compression.Comment: Submitted to Proceedings of the IEEE, 29 page

Structural instrumentation and monitoring of the Block Island Offshore Wind Farm

publishedVersio

NCR-days 2008 : 10 years NCR: November 20-21

De verschillende subthema’s van de NCR-dagen 2008, (i) Stroomgebied en Overstromingsrisico management (ii) Hydrologie en (iii) Geomorfodynamica en Morfologie, dekken een groot gedeelte van het hedendaagse onderzoek dat in Nederland op rivierkundig gebied wordt uitgevoerd

Design criteria for flight evaluation. Monograph 4 - Control system evaluation

Methods and analyses for flight evaluation of control systems for multistage launch vehicle

Імовірність та детерміністична оцінка ризиків екстремальних об’єктів і екологічно загрозливих систем

The paper include mostly the results of works of the Research Institute for Mechanics of Quickproceeding Processes united in a general research direction - creation of the methodology for risk assessment and risk management for ecologically hazardous systems, consisting of the set of different technological analyzed objects. The elements of system can be characterized by high level of radiation, toxic, explosion, fire and other hazards. The probalistic and deterministic approach for risk assessment, based on mathematical methods of system analysis, non-liner dynamics and computer simulation, has been developed. Branching in problem definition, as well as diversity of factor and criteria for determination of system status, is also taken into account. The risks caused by both objective and subjective factors (including human factor) are examined. In many performed studies, the leading structural element, dominating in determination of the system safety, is the structural part of an object. The methodology is implemented for the safety analysis (risk assessment) for Chernobyl NPP Shelton Object and other industrial buildingsПриведены основные результаты работ Научно-исследовательского института механики быстротечных процессов, направленных на создание методологии оценки рисков и управление рисками экологически опасных систем, которые состоят из разнообразных технологических объектов и элементы которых могут характеризоваться высоким уровнем радиационной, токсичной, эксплуатационной и пожарной опасности. Описаны вероятность и детерминистические части оценки рисков, которые базируются на математических методах системного анализа, нелинейной динамики и компьютерного моделирования. Учтено множество разветвлений общей задачи, разные факторы и критерии, влияющие на состояние системы и выбор стратегии управления рисками. Рассмотрены риски как на субъективной, так и на объективной основе с учетом человеческого фактора. Показано, что главным элементом исследований, доминирующим в определении безопасности системы, является анализ конструктивной части объекта. Предложено методологию оценки рисков использовать для анализа безопасности объекта «Укрытие» Чернобыльской АЭС и других промышленных объектовНаведено основні результати робіт Науково-дослідного інституту механіки швидкоплинних процесів, спрямованих на створення методології оцінки ризиків і керування ризиками екологічно загрозливих систем, що складаються з різноманітних технологічних об’єктів і елементи яких можуть характеризуватися високим рівнем радіаційної, токсичної, експлуатаційної, пожежної та іншими загрозами. Описано ймовірнісну і детерміністичну частини оцінки ризиків, які базуються на математичних методах системного аналізу, нелінійної динаміки та комп’ютерного моделювання. Ураховано множину розгалужень загальної задачі, різні фактори та критерії, що впливають на стан системи і вибір стратегії керування ризиками. Розглянуто ризики як на суб’єктивній, так і на об’єктивній підставі з урахуванням людського фактора. Показано, що основним елементом досліджень, домінуючим у визначенні безпеки системи, є аналіз конструктивної частини об’єкта. Запропоновано методологію оцінки ризиків використовувати для аналізу безпеки об’єкта “Укриття” Чорнобильської АЕС та інших промислових об’єкті