Найти книгу: "Loop-shaping Robust Control"

The loop-shaping approach consists of obtaining a specification in relation to the open loop of the control from specifications regarding various closed loop transfers, because it is easier to work on a single transfer (in addition to the open loop) than on a multitude of transfers (various loopings such as set point/error, disturbance/error, disturbance/control, etc.). The simplicity and flexibility of the approach make it very well adapted to the industrial context. This book presents the loop-shaping approach in its entirety, starting with the declension of high-level specifications into a loop-shaping specification. It then shows how it is possible to fully integrate this approach for the calculation of robust and efficient correctors with the help of existing techniques, which have already been industrially tried and tested, such as H-infinity synthesis. The concept of a gap metric (or distance between models) is also presented along with its connection with the prime factors of a set of systems shaping a ball of models, as well as its connections with robust synthesis by loop-shaping, in order to calculate efficient and robust correctors. As H-infinity loop-shaping is often demanding in terms of the order of correctors, the author also looks at loop-shaping synthesis under an ordering constraint. Two further promising lines of research are presented, one using stochastic optimization, and the other non-smooth optimization. Finally, the book introduces the concept of correction with two degrees of freedom via the formalism of prime factorization. Avenues for future work are also opened up by the author as he discusses the main drawbacks to loop-shaping synthesis, and how these issues can be solved using modern optimization techniques in an increasingly competitive industrial context, in accordance with ever more complex sets of functional specifications, associated with increasingly broad conditions of usage. Contents Introduction 1. The Loop-shaping Approach 2. Loop-shaping H-infinity Synthesis 3. Two Degrees-of-Freedom Controllers 4. Extensions and Optimizations Appendix 1. Demonstrative Elements on the Optimization of Robust Stabilization with Order Constraint Appendix 2. Establishment of Real LMIs for the Quasi-Convex Problem of Optimization of the Weighting Functions About the Authors Philippe Feyel is an R&D Engineer for the high-tech company Sagem Defense Securite, part of the defence and security business of the SAFRAN group, in Paris, France.

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В книге описаны пакеты расширения Control System Toolbox и Robust Control Toolbox системы MATLAB 7, предназначенные для анализа и синтеза систем управления. Коротко изложены основные теоретические положения, принятые при разработке указанных пакетов расширения. Приведены многочисленные примеры использования этих пакетов расширения для решения конкретных задач с подробным пояснением выполняемых операций. Показаны возможности совместного использования пакетов Control System Toolbox и Robust Control Toolbox с пакетом Simulink, что увеличивает возможности всех трех указанных пакетов расширения. Книга может быть использована студентами вузов соответствующих специальностей при курсовом и дипломном проектировании, инженерами и научными работниками при создании новых и исследованиях уже разработанных систем автоматического управления. Книга рассчитана как на начинающих, так и на достаточно опытных пользователей.

The economic climate is ripe for another golden age of shareholder activism Deep Value: Why Activist Investors and Other Contrarians Battle for Control of Losing Corporations is a must-read exploration of deep value investment strategy, describing the evolution of the theories of valuation and shareholder activism from Graham to Icahn and beyond. The book combines engaging anecdotes with industry research to illustrate the principles and methods of this complex strategy, and explains the reasoning behind seemingly incomprehensible activist maneuvers. Written by an active value investor, Deep Value provides an insider's perspective on shareholder activist strategies in a format accessible to both professional investors and laypeople. The Deep Value investment philosophy as described by Graham initially identified targets by their discount to liquidation value. This approach was extremely effective, but those opportunities are few and far between in the modern market, forcing activists to adapt. Current activists assess value from a much broader palate, and exploit a much wider range of tools to achieve their goals. Deep Value enumerates and expands upon the resources and strategies available to value investors today, and describes how the economic climate is allowing value investing to re-emerge. Topics include: Target identification, and determining the most advantageous ends Strategies and tactics of effective activism Unseating management and fomenting change Eyeing conditions for the next M&A boom Activist hedge funds have been quiet since the early 2000s, but economic conditions, shareholder sentiment, and available opportunities are creating a fertile environment for another golden age of activism. Deep Value: Why Activist Investors and Other Contrarians Battle for Control of Losing Corporations provides the in-depth information investors need to get up to speed before getting left behind.

Institute a proactive reputational management framework that matches individual behaviour to organizational values The Business Ethics Twin-Track is a practical guide to reputational risk management. A deep exploration of the concept of reputation, the ways in which it can suffer, and the consequences when it does, the book outlines an ethics controls framework that can mitigate risk and improve business performance. Readers will learn how to identify and manage weaknesses, and how to institute a system of governance that embeds proper, ethical conduct into the corporate culture. A clear set of controls and procedures provides actionable instruction that can be customised to suit the organisational structure, and discussion of historical and international ethics provides the context for implementation. Case studies illustrate the real-world applications, while interviews with executives from a variety of sectors provide important practical insights into some of the key issues discussed in the book. The law regulates behaviour in health and safety and financial crime, but otherwise, conduct is largely determined by the culture, ethics and values of an organisation. Effective reputation management is complex, and often difficult to achieve, as much of the available information on the topic is more theoretical than practical. This book bridges the gap by providing the tools that will help managers to: Implement a modern ethics control framework, encompassing codes, officers, reporting lines and training Consider the role of the media and social media in reputational damage to individuals and organisations Analyse the key controls in responsibility and governance frameworks from around the world Determine the causes and controls of conduct risk, including incompetence, negligence and criminality Today's fast-paced media environment means corporate reputations can be obliterated in moments, and damage limitation is often too little, too late. Adopting the measures set out in this book will embed ethics into the culture, and match people's behaviours to the organisation's values.