The Experts below are selected from a list of 144 Experts worldwide ranked by ideXlab platform
J. Roychowdhury - One of the best experts on this subject based on the ideXlab platform.
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CICC - Understanding injection locking in negative-resistance LC oscillators intuitively using nonlinear feedback analysis
Proceedings of the IEEE 2005 Custom Integrated Circuits Conference 2005., 2005Co-Authors: J. RoychowdhuryAbstract:Simple, accessible and intuitive treatments of oscillator injection locking, that at the same time maintain rigour especially with regard to nonlinearities, appear to be lacking in the literature. We present a novel analysis that incorporates all these features but uses only basic mathematical and circuit theory concepts. We develop a Graphical Procedure for finding the nonlinear relationship between injection amplitude and lock range that is both accurate and insightful. We also provide freely downloadable MATLAB scripts implementing our analysis and Graphical Procedures. These scripts can be easily adapted to any negative-resistance LC oscillator and used for convenient and accurate exploration of injection locking and other properties
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Understanding injection locking in negative-resistance LC oscillators intuitively using nonlinear feedback analysis
Proceedings of the IEEE 2005 Custom Integrated Circuits Conference 2005., 2005Co-Authors: J. RoychowdhuryAbstract:Simple, accessible and intuitive treatments of oscillator injection locking, that at the same time maintain rigour especially with regard to nonlinearities, appear to be lacking in the literature. We present a novel analysis that incorporates all these features but uses only basic mathematical and circuit theory concepts. We develop a Graphical Procedure for finding the nonlinear relationship between injection amplitude and lock range that is both accurate and insightful. We also provide freely downloadable MATLAB scripts implementing our analysis and Graphical Procedures. These scripts can be easily adapted to any negative-resistance LC oscillator and used for convenient and accurate exploration of injection locking and other properties
Xiao Feng - One of the best experts on this subject based on the ideXlab platform.
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a novel Graphical Procedure based on ternary diagram for minimizing refinery consumption of fresh hydrogen
Journal of Cleaner Production, 2012Co-Authors: Bin Wang, Xiao FengAbstract:In the oil refining and petrochemical industry, hydrogen flows in so-called hydrogen networks are a common feature. A practical problem in hydrogen network analysis is to identify the minimum fresh hydrogen input flowrate to ensure that the hydrogen streams produced by combining the flows of internal sources satisfy certain concentration specifications of sinks for hydrogen and impurities such as H2S. To tackle this problem, this paper presents a novel Graphical Procedure, much inspired by the pioneering work of Shelley and El-Halwagi (2000) that makes use of the unique features of ternary composition diagram for three-component systems. In addition, accounting for constraints on flowrates inside a ternary visualization diagram is another novel aspect of this Graphical method. Two literature case studies based on hydrogen systems with multiple impurities are solved to illustrate the effectiveness and elegance of the proposed method.
Lorenzo Ntogramatzidis - One of the best experts on this subject based on the ideXlab platform.
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Analytical and Graphical Design of Lead-Lag Compensators
International Journal of Control, 2011Co-Authors: Roberto Zanasi, Stefania Cuoghi, Lorenzo NtogramatzidisAbstract:In this article an approach based on inversion formulae is used for the design of lead–lag compensators which satisfy frequency domain specifications on phase margin, gain margin and phase (or gain) crossover frequency. An analytical and Graphical Procedure for the compensator design on the Nyquist and Nichols planes is presented with some numerical examples.
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Lead-Lag compensators: Analytical and Graphical design on the Nyquist plane
2011 50th IEEE Conference on Decision and Control and European Control Conference, 2011Co-Authors: Roberto Zanasi, Stefania Cuoghi, Lorenzo NtogramatzidisAbstract:This paper presents a design method for the synthesis of a general class of lead-lag compensators to exactly satisfy gain and phase margins specifications. A free parameter of the compensator is used as a degree of freedom in order to satisfy additional requirements on the phase and/or gain crossover frequencies. A Graphical Procedure for the compensator design on the Nyquist plane is presented with some numerical examples.
Jean-jacques E. Slotine - One of the best experts on this subject based on the ideXlab platform.
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A Graphical Approach to Prove Contraction of Nonlinear Circuits and Systems
IEEE Transactions on Circuits and Systems I: Regular Papers, 2011Co-Authors: Giovanni Russo, Mario Di Bernardo, Jean-jacques E. SlotineAbstract:This paper derives a novel approach to prove contraction of nonlinear dynamical systems, based on the use of non-Euclidean norms and their associated matrix measures. A Graphical Procedure is developed to derive conditions for a system to be contracting. Such conditions can also be used to design control strategies to make a system contracting, or to design consensus and synchronization strategies for networks of nonlinear oscillators. After presenting the main steps of the approach and its proof, both for continuous-time and discrete-time systems, we illustrate the theoretical derivations on a set of representative examples.
Roberto Zanasi - One of the best experts on this subject based on the ideXlab platform.
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Analytical and Graphical Design of Lead-Lag Compensators
International Journal of Control, 2011Co-Authors: Roberto Zanasi, Stefania Cuoghi, Lorenzo NtogramatzidisAbstract:In this article an approach based on inversion formulae is used for the design of lead–lag compensators which satisfy frequency domain specifications on phase margin, gain margin and phase (or gain) crossover frequency. An analytical and Graphical Procedure for the compensator design on the Nyquist and Nichols planes is presented with some numerical examples.
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Lead-Lag compensators: Analytical and Graphical design on the Nyquist plane
2011 50th IEEE Conference on Decision and Control and European Control Conference, 2011Co-Authors: Roberto Zanasi, Stefania Cuoghi, Lorenzo NtogramatzidisAbstract:This paper presents a design method for the synthesis of a general class of lead-lag compensators to exactly satisfy gain and phase margins specifications. A free parameter of the compensator is used as a degree of freedom in order to satisfy additional requirements on the phase and/or gain crossover frequencies. A Graphical Procedure for the compensator design on the Nyquist plane is presented with some numerical examples.
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Discrete inversion formulas for the design of lead and lag discrete compensators
2009 European Control Conference (ECC), 2009Co-Authors: Roberto Zanasi, Riccardo MorselliAbstract:In the paper, new discrete inversion formulas suitable for the design of lead and lag discrete compensators in the frequency domain are presented. These formulas can be very useful for teaching in Automatic Control courses. The links of these discrete formulas with the continuous inversion formulas are deeply investigated. A simple Graphical Procedure for the design of discrete compensators on the Nyquist plane is also presented. Finally, some numerical examples illustrate the presented results.
