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作者： Isaacs, Jason T. Klein, Daniel J. Hespanha, João P. Center for Control Dynamical Systems and Computation Department of Electrical and Computer Engineering University of California Santa Barbara CA 93106 United States

ISBN: (纸本)9781457700804

We study the problem of finding the minimum-length curvature constrained closed path through a set of regions in the plane. This problem is referred to as the Dubins Traveling Salesperson Problem with Neighborhoods (DTSPN). Two algorithms are presented that transform this infinite dimensional combinatorial optimization problem into a finite dimensional asymmetric TSP by sampling and applying the appropriate transformations, thus allowing the use of existing approximation algorithms. We show for the case of disjoint regions, the first algorithm needs only to sample each region once to produce a tour within a factor of the length of the optimal tour that is independent of the number of regions. We present a second algorithm that performs no worse than the best existing algorithm and can perform significantly better when the regions overlap. © 2011 AACC American Automatic control Council.

关键词： Traveling salesman problem

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Comparative Study of Parametric Disturbances Effect on Cart-Inverted Pendulum System Stabilization 1

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International Conference on Modern Electronics Devices and Communication Systems, MEDCOM 2021

作者： Verma, Neelam Valluru, Sudarshan K. Department of Electrical Engineering Center for Control of Dynamical Systems and Computation Delhi Technological University Delhi India

ISBN: (数字)9789811963834

ISBN: (纸本)9789811963827

The main motivation behind the present work was to validate the impact of pendulum mass, cart mass, and length of pendulum on stabilization and swing-up of cart-inverted pendulum. Inverted pendulum system is a classic benchmark example of underactuated electro-mechanical systems, where the degree of freedom is less than the number of inputs available. PID controller was designed for a set of parameter values of the system. MATLAB simulation was carried out for different values of pendulum mass (0.2–0.25 kg), pendulum length (0.3–0.34 m), and cart mass (2.3–2.45 kg). The performance of considered cart- inverted pendulum system is demonstrated with simulation results for a different set of results, and a comparative analysis was made to comment on their effects on swing-up and stabilization. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Stabilization

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Ontology-based design pattern recognition

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12th International Conference on Knowledge-Based Intelligent Information and engineering Systems

作者： Kirasic, Damir Basch, Danko Information Support Center University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Faculty of Electrical Engineering and Computing

ISBN: (纸本)9783540855620

This paper presents ontlology-based architecture for pattern recognition in the context of static source code analysis. The proposed system has three subsystems: parser, OWL ontologies and analyser. The parser subsystem translates the input coded to AST that is constructed as an XML tree. The OWL ontologies define code patterns and general programming concepts. The analyser subsystem constructs instances of the input code as ontology individuals and asks the reasoner to classify them. The experience gained in the implementation of the proposed system and some practical issues are discussed. The recognition system successfully integrates the knowledge representation field and static code analysis. resulting in greater flexibility of the recognition system.

关键词： knowledge-based system ontology-based system static code analysis description logics OWL application formal pattern definition

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A 2.4-GHz silicon-on-sapphire CMOS low-noise amplifier

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IEEE MICROWAVE AND GUIDED WAVE LETTERS 1997年第10期7卷 350-352页

作者： Johnson, RA Chang, CE delaHoussaye, PR Wood, ME Garcia, GA Asbeck, PM Lagnado, I IEEE Department of Electrical and Computer Engineering University of California Rockwell Science Center Naval Command Control and Ocean Surveillance Center RDT&E Division (NRaD)

A low-noise amplifier operating at 2.4 GHz has been fabricated with MOSFET's in silicon-on-sapphire technology, The amplifier has a 2.8-dB noise figure, IO-dB gain, and 14-dBm output referred IP3 with 14-mW power ... 详细信息

关键词： microwave FET amplifiers noise MMIC's

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computation of Hopf Bifurcation Points in the Magnetic Levitation System 4th

Computation of Hopf Bifurcation Points in the Magnetic Levit...

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4th International Conference on Information and Communication Technology for Intelligent Systems, ICTIS 2020

作者： Valluru, Sudarshan K. Gupta, Anshul Verma, Aditya Center for Control of Dynamical Systems and Computation Department of Electrical Engineering Delhi Technological University Delhi110042 India

ISBN: (纸本)9789811570773

This research brief aims to study the bifurcation analysis of an electromagnetic levitation (maglev) system. The bifurcation analysis involves first performing the numerical analysis, and then the simulations using MATLAB are analyzed to verify the results. The study requires derivation of a mathematical model for the maglev system, which can be used for the bifurcation analysis. The bifurcation analysis involves a numerical comparison of the system equations with the predefined constraints. The input voltage is being used as the bifurcation parameter, which is by ball’s position, ball’s velocity, and the current flowing through the circuit. The analysis allows us to compute a combination of values of parameters, when simulations are performed to check system characteristics, periodic oscillations at these values are obtained. Hence, it proves the existence of Hopf bifurcation at the computed value of system parameters. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Hopf bifurcation

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Optimization Strategy of Bio-Inspired Metaheuristic Algorithms Tuned PID controller for PMBDC Actuated Robotic Manipulator 3

Optimization Strategy of Bio-Inspired Metaheuristic Algorith...

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3rd International Conference on Computing and Network Communications, CoCoNet 2019

作者： Valluru, Sudarshan K. Singh, Madhusudan Center for Control of Dynamical Systems and Computation Department of Electrical Engineering Delhi Technological University Delhi110042 India

The present article makes an attempt to evaluate the computational performance of genetic meta heuristic optimized control algorithms. Here, the multi-objective bio inspired algorithm (MOGA) and adaptive particle swarm optimization (APSO) algorithm are used to tune linear PID (L-PID) and nonlinear PID(NL-PID) controllers to implement performance and execution control of permanent magnet brushed DC (PMBDC) motor actuated robotic manipulator. The MOGA, APSO optimised nonlinear and linear PID controllers have been validated for their response efficacy and compared in respect of the steady-state error, overshoot and settling time of PMBDC driven robotic Manipulator. The efficacy of metaheuristics such as APSO and MOGA tuned NL-PID controller are better as compared to the L- PID controlled objects. Experimental results show that the NL-PID controller mends the controlled objects' performace with a reduction in both the overshoot as well as the settling time, if tuned either with MOGA or APSO for L-PID controllers while NL-PID controller tuned with APSO gives satisfactory dynamic response of the system. © 2020 The Authors. Published by Elsevier B.V.

关键词： Permanent magnets

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João Hespanha [People in control]

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IEEE control Systems 2014年第1期34卷 22-24页

作者： Hespanha, João Center for Control Dynamical Systems and Computation University of California Santa BarbaraCA United States Department of Electrical and Computer Engineering University of California Harold Frank Hall Santa BarbaraCA93106-9560 United States

In this issue of IEEE control Systems Magazine, we speak with João Hespanha, who is a professor and chair of the department of electrical and computer engineering and Director of the center for control, Dynamical Systems, and computation at the University of California, Santa Barbara. He received a Licenciatura and an M.S. at Instituto Superior Técnico, Lisbon, Portugal, in 1991 and 1993, respectively, and a Ph.D. from Yale University in 1998. He was formerly on the faculty in the department of electrical engineering at the University of Southern California. He is a Fellow of IEEE and a recipient of the Automatica Theory/Methodology Best Paper Prize, the George S. Axelby Outstanding Paper Award, and the Antonio Ruberti Young Researcher Prize. His research interests include hybrid systems, networked control systems, cooperative control, advanced sensing, and systems biology. © 2014 IEEE.

关键词： Hybrid systems

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Almost Sure Attitude Consensus in Multispacecraft Systems With Stochastic Communication Links

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IFAC-PapersOnLine 2017年第1期50卷 9392-9397页

作者： Rezaee H. Abdollahi F. The Center of Excellence on Control and Robotics Department of Electrical Engineering Amirkabir University of Technology Tehran Iran Department of Electrical and Computer Engineering Concordia University Montreal Quebec Canada

Leaderless attitude consensus problem over multispacecraft systems is studied. The base of convergence analysis of existing results devoted to attitude consensus control of multispacecraft systems is deterministic knowledge on networks communication links. The main contribution of the present study is to design a control strategy guaranteeing almost sure attitude consensus in a multispacecraft system when communication links stochastically fail over time. Moreover, it is assumed that there exist constraints on the spacecraft input torques. To achieve the mentioned objectives, we propose a magnitude-constrained consensus control law for the spacecraft; then, by invoking the generalized invariance principle and the super-martingales convergence theorem, almost sure convergence of quaternion-based consensus errors to zero is concluded. The results are verified via a simulation example. © 2017

关键词： Attitude consensus coordination generalized invariance principle spacecraft stochastic communication

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Experimental Investigation of Fully Informed Particle Swarm Optimization tuned Multi Loop L-PID and NL-PID controllers for Gantry Crane System 3

Experimental Investigation of Fully Informed Particle Swarm ...

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3rd International Conference on Computing and Network Communications, CoCoNet 2019

作者： Valluru, Sudarshan K. Kaur, Manpreet Kartikeya, Kumar Goel, Arnav Dobhal, Daksh Incubation Center for Control Dynamical Systems and Computation Department of Electrical Engineering Delhi Technological University Delhi110042 India

This paper presents a novel stabilizing nonlinear PID controller with real time experimental validation on a gantry crane system. Our adaptive control technique describes the underactuated system as a nonlinear mapping of control signal with the hyperbolic tangent function. The proposed function is used to impose a constraint on the proportional, integral and derivative errors such that the system results an effective and robust performance. The main trait of the controller is to bound the high control error to result in a lesser correction value. An enhanced hybrid method based on the bioinspired meta-heuristic algorithm Particle Swarm Optimisation is utilised to tune the gain coefficients Kpδ, KIδ and KDδ. The Linear controller and the proposed controllers were compared based on the stabilizing action on the real time system. The real time results depict that the nonlinear PID performs better than the conventional PID. © 2020 The Authors. Published by Elsevier B.V.

关键词： controllers

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Quantum nutcracker for near-room-temperature H_2 dissociation

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Science Bulletin 2019年第1期64卷 4-7页

作者： Lei Tao Wei Guo Yu-Yang Zhang Yan-Fang Zhang Jiatao Sun Shixuan Du Sokrates T.Pantelides Institute of Physics & University of Chinese Academy of Sciences Chinese Academy of Sciences School of Physics Beijing Institute of Technology CAS Center for Excellence in Topological Quantum Computation Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science Vanderbilt University

Solid surfaces are well known to mediate the dissociation of molecules via electronic interactions (heterogeneous catalysis).In particular,H2 dissociation on metal surfaces has been widely studied for several decades because it is an important step in hydrogenation *** efficiency of the process depends on both the electronic properties of the metal surface and the surface microstructures [1].Enhanced efficiency and reduced cost are usually achieved by using nanoparticles,which have increased the surface-to-volume ratio and low-coordination atoms [2].Another approach is to optimize the local electronic states of the metal surface by doping [3],alloying with other elements [4],or by taking advantage of strong interactions between metal nanoparticles and the supporting substrate [5].These methods often work together to tailor the adsorption properties on surfaces and show major efficiency enhancement.

关键词： Quantum nutcracker Electron interaction The electronic properties

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