Search results

article

Neue Technologien in der Diabetestherapie

Georg Serfling, Hannes Kalscheuer, Sebastian M. Schmid, Hendrik Lehnert

Der Internist > 2019 > 60 > 9 > 912-916

Der technologische Fortschritt hat zahlreiche Innovationen in der Diabetestherapie ermöglicht und wird auch zukünftig die Versorgung von Patienten mit Diabetes verbessern. Mit der Veröffentlichung des ersten Hybrid-closed-loop-Systems in den USA ist die nächste Entwicklungsstufe auf dem Weg zur künstlichen Bauchspeicheldrüse erreicht. Durch die automatische Regulation der basalen Insulinsekretion...

article

Fuzzy logic PID control of a PMDCM speed connected to a 10-kW DC PV array microgrid - case study

Roxana-Elena Tudoroiu, Mohammed Zaheeruddin, Nicolae Tudoroiu, Dumitru Dan Burdescu

Annals of Computer Science and Information Systems > 2019 > Vol. 18 > 359–-362

The main objective of this paper is focused on the real time implementation in a MATLAB/SIMULINK environment of a closed-loop hybrid control strategy structure consisting of a combination of Fuzzy Logic control approach and a standard PID control strategy. This strategy is applied to control the speed of a 2 HP 1750 rpm permanent magnet DC motor used in a wide range of HVAC applications. The novelty...

article

Current-Limiting Three-Phase Rectifiers

Qing-Chang Zhong, George C. Konstantopoulos

IEEE Transactions on Industrial Electronics > 2018 > 65 > 2 > 957 - 967

In this paper, a nonlinear controller is proposed for a three-phase rectifier so that its input current does not exceed a given limit. At the same time, the proposed controller can achieve accurate dc output voltage regulation and reactive power control independently from system parameters including the load during the normal operation. Using the generic

$dq$

transformation and the nonlinear model...

article

Linear Quadratic Regulator-Based Bumpless Transfer in Microgrids

Dibakar Das, Gurunath Gurrala, U. Jayachandra Shenoy

IEEE Transactions on Smart Grid > 2018 > 9 > 1 > 416 - 425

This paper presents a linear quadratic regulator (LQR)-based bumpless transfer controller for achieving seamless transition between the grid connected and the islanded modes of operation in microgrids. During the grid connected mode, the inverter-based distributed generators (DGs) operate in current controlled mode where they supply a constant active and reactive power. During the islanded mode, the...

article

Stability and ${\ell }^{2}$ -Gain Analysis of Adaptive Control Systems With Event-Triggered Try-Once-Discard Protocols

Masashi Wakaiki

IEEE Control Systems Letters > 2018 > 2 > 1 > 157 - 162

This letter addresses the stability and

$ {\ell }^{2}$

-gain analysis of adaptive control systems with event-triggered try-once-discard protocols. At every sampling time, an event trigger evaluates an error between the current value and the last released value of each measurement and determines whether to transmit the measurements and which measurements to transmit, based on the try-once-discard...

article

Disturbance Compensation With Finite Spectrum Assignment for Plants With Input Delay

Igor Furtat, Emilia Fridman, Alexander Fradkov

IEEE Transactions on Automatic Control > 2018 > 63 > 1 > 298 - 305

This paper presents a method for compensation of unknown bounded smooth disturbances for linear time invariant (LTI) plants with known parameters in the presence of constant and known input delay. The proposed control law is a sum of the classical predictor suggested by Manitius and Olbrot for finite spectrum assignment and a disturbance compensator. The disturbance compensator is a novel control...

article

An Explanation of Oscillations Due to Wind Power Plants Weak Grid Interconnection

Lingling Fan, Zhixin Miao

IEEE Transactions on Sustainable Energy > 2018 > 9 > 1 > 488 - 490

An existing wind power plant at ERCOT experienced poorly damped and undamped voltage oscillations under weak grid conditions. The oscillations became worse during high power outputs. This letter aims to find the root cause of such oscillations. Our research provides a linearized system model by combining the vector control of wind power plants and the weak grid interconnection. Using this model, this...

article

Riccati-Based Design of Event-Triggered Controllers for Linear Systems With Delays

Dominicus Paulus Borgers, Victor Sebastiaan Dolk, W. P. M. H. Heemels

IEEE Transactions on Automatic Control > 2018 > 63 > 1 > 174 - 188

In event-triggered control (ETC) systems, the measured state or output of the plant is sent to the controller at so-called event times. In many ETC systems, these event times are generated based on a static function of the current state or output measurement of the system and its sampled-and-held version that is available to the controller. Hence, the event-generator does not include any dynamics...

article

A Novel State Transformation Approach to Tracking of Piecewise Linear Trajectories

Ali Bazaei, Zhiyong Chen, Yuen Kuan Yong, S. O. Reza Moheimani

IEEE Transactions on Control Systems Technology > 2018 > 26 > 1 > 128 - 138

In this paper, we propose a novel approach for tracking of piecewise linear trajectories, such as triangular and staircase waveforms. We derive state and input transformations, which result in closed-loop error dynamics driven by a series of impulses. The proposed control structure takes the form of an output-feedback-feedforward system that is straightforward to implement. In contrast to the recently...

article

Reachable Set Estimation and Decentralized Controller Design for Large-Scale Nonlinear Systems With Time-Varying Delay and Input Constraint

Zhixiong Zhong, Rong-Jong Wai, Zhenhua Shao, Min Xu

IEEE Transactions on Fuzzy Systems > 2017 > 25 > 6 > 1629 - 1643

This paper investigates the problem of reachable set estimation and decentralized controller design for large-scale nonlinear systems, where time-varying delays and nonlinearities appear in interconnections connected to other subsystems. The Takagi–Sugeno model is used to describe each nonlinear subsystem. The aim of this paper is to design a decentralized state-feedback fuzzy controller such that...

article

A Belief-Evolution-Based Approach for Online Control of Fuzzy Discrete-Event Systems Under Partial Observation

Xiang Yin

IEEE Transactions on Fuzzy Systems > 2017 > 25 > 6 > 1830 - 1836

In this paper, we investigate the partially observed supervisor synthesis problem in the framework of fuzzy discrete-event systems (DESs). The goal is to synthesize a fuzzy supervisor such that the behavior of the closed-loop system is within a given fuzzy language. A new approach for solving this problem is proposed based on the idea of belief evolution. Specifically, we propose an algorithm that...

article

Estimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost

Hong Lin, Hongye Su, Peng Shi, Renquan Lu, more

IEEE Transactions on Cybernetics > 2017 > 47 > 12 > 4074 - 4085

In this paper, we study the state estimation and optimal control [i.e., linear quadratic Gaussian (LQG) control] problems for networked control systems in which control inputs, observations, and packet acknowledgments (ACKs) are randomly lost. The packet ACK is a signal that is transmitted from the actuator to notice the estimator the occurence of control packet loss. For such systems, we obtain the...

article

Ultimate Boundedness Control for Networked Systems With Try-Once-Discard Protocol and Uniform Quantization Effects

Lei Zou, Zidong Wang, Qing-Long Han, Donghua Zhou

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6582 - 6588

This paper is concerned with the ultimate boundedness control problem for a class of networked nonlinear systems subject to the try-once-discard (TOD) protocol scheduling and uniform quantization effects. To prevent the transmission data from collisions, the communication between sensor nodes and the controller is implemented via a constrained communication channel, where only one sensor node is permitted...

article

Dynamic Event-Based Control of Nonlinear Stochastic Systems

Yingchun Wang, Wei Xing Zheng, Huaguang Zhang

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6544 - 6551

In this paper, the event-based control problems for nonlinear stochastic systems are investigated. First, a novel condition for stochastic input-to-state stability is established. Then, the dynamic event-triggered control approach is proposed and the stochastic stability of the resulting closed-loop system is also proved. Next, a new dynamic self-triggering mechanism is developed and the additional...

article

Control of Transport PDE/Nonlinear ODE Cascades With State-Dependent Propagation Speed

Mamadou Diagne, Nikolaos Bekiaris-Liberis, Andreas Otto, Miroslav Krstic

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6278 - 6293

In this paper, we deal with the control of a transport partial differential equation/ nonlinear ordinary differential equation (PDE/nonlinear ODE) cascade system in which the transport coefficient depends on the ODE state. We develop a PDE-based predictor-feedback boundary control law, which compensates the transport dynamics of the actuator and guarantees global asymptotic stability of the closed-loop...

article

Robust Global Adaptive Exponential Stabilization of Discrete-Time Systems With Application to Freeway Traffic Control

Iasson Karafyllis, Maria Kontorinaki, Markos Papageorgiou

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6195 - 6208

This paper is devoted to the development of adaptive control schemes for uncertain discrete-time systems, which guarantee robust global exponential convergence to the desired equilibrium point of the system. The proposed control scheme consists of a nominal feedback law, which achieves robust global exponential stability properties when the vector of the parameters is known, in conjunction with a...

article

A Platform That Directly Evolves Multirotor Controllers

David Howard

IEEE Transactions on Evolutionary Computation > 2017 > 21 > 6 > 943 - 955

We describe an experimental platform that uses differential evolution to automatically discover high-performance multirotor controllers. All control parameters are tuned simultaneously, no modeling is required, and, as the evolution occurs on a real multirotor, the controllers are guaranteed to work in reality. The platform is able to run back-to-back experiments for over a week without human intervention...

article

Finite-Time Stabilizability, Detectability, and Dynamic Output Feedback Finite-Time Stabilization of Linear Systems

F. Amato, M. Darouach, G. De Tommasi

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6521 - 6528

In this note, we deal with linear systems and we extend to the finite-time setting the concepts of stabilizability and detectability. It will be shown that, similarly to what happens in the classical Lyapunov framework, even in the finite-time context, stabilizability and detectability play a role into the existence of stabilizing dynamical controllers. We prove that a dynamic output feedback controller,...

article

Performance Limitations of Nonminimum Phase Affine Nonlinear Systems

Hoda Nokhbeh Foghahaayee, Mohammad B. Menhaj, Heidar A. Talebi, Mahta Khoshnam

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6430 - 6437

This paper presents an analytical method to determine the minimum norm of the regulation error as well as that of the trajectory tracking error for nonminimum phase affine nonlinear systems. The proposed method derives the Hamilton–Jacobi–Bellman equation associated with the cheap control problem. Depending on the order of the system's internal dynamics, the proposed technique either constructs an...

article

Cooperative Output Regulation of Linear Multi-Agent Systems by a Novel Distributed Dynamic Compensator

Maobin Lu, Lu Liu

IEEE Transactions on Automatic Control > 2017 > 62 > 12 > 6481 - 6488

In this paper, we study the cooperative output regulation problem for heterogeneous linear multi-agent systems by a distributed feedforward approach. In comparison with existing results for similar problems, a novel distributed dynamic compensator is proposed, which does not need to exchange its state information among the communication network. Thus, it reduces the communication burden and facilitates...

INFONA - science communication portal

Search results

Neue Technologien in der Diabetestherapie

Fuzzy logic PID control of a PMDCM speed connected to a 10-kW DC PV array microgrid - case study

Current-Limiting Three-Phase Rectifiers

Linear Quadratic Regulator-Based Bumpless Transfer in Microgrids

Stability and ${\ell }^{2}$ -Gain Analysis of Adaptive Control Systems With Event-Triggered Try-Once-Discard Protocols

Disturbance Compensation With Finite Spectrum Assignment for Plants With Input Delay

An Explanation of Oscillations Due to Wind Power Plants Weak Grid Interconnection

Riccati-Based Design of Event-Triggered Controllers for Linear Systems With Delays

A Novel State Transformation Approach to Tracking of Piecewise Linear Trajectories

Reachable Set Estimation and Decentralized Controller Design for Large-Scale Nonlinear Systems With Time-Varying Delay and Input Constraint

A Belief-Evolution-Based Approach for Online Control of Fuzzy Discrete-Event Systems Under Partial Observation

Estimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost

Ultimate Boundedness Control for Networked Systems With Try-Once-Discard Protocol and Uniform Quantization Effects

Dynamic Event-Based Control of Nonlinear Stochastic Systems

Control of Transport PDE/Nonlinear ODE Cascades With State-Dependent Propagation Speed

Robust Global Adaptive Exponential Stabilization of Discrete-Time Systems With Application to Freeway Traffic Control

A Platform That Directly Evolves Multirotor Controllers

Finite-Time Stabilizability, Detectability, and Dynamic Output Feedback Finite-Time Stabilization of Linear Systems

Performance Limitations of Nonminimum Phase Affine Nonlinear Systems

Cooperative Output Regulation of Linear Multi-Agent Systems by a Novel Distributed Dynamic Compensator

Filter options

Publication date

Content availability

Publication type

Publication language

Keywords

Data set

INFONA - science communication portal

Search results

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Publication language

Keywords

Data set

Reporting an error / abuse

Sending the report failed

Accessibility options