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检索条件"主题词=Control Algorithm"

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Development of a Model Predictive controller for an Artificial Pancreas 3

Development of a Model Predictive Controller for an Artifici...

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3rd International Conference on Electrical and Information Technologies (ICEIT)

作者： El Hachimi, M. Ballouk, A. Khelafa, I. Baghdad, A. Mohammedia Univ Hassan II Casablanca FST Lab Elect Energy Automat & Data Proc LEEA&TI BP 146 Mohammadia 20650 Morocco

ISBN: (纸本)9781538615164

Introduction: Type 1 diabetes occurs when beta cells are destroyed by the body's own immune system. Treatment of type 1 diabetes mellitus could be greatly improved by applying a closed-loop control strategy to insulin delivery, also known as an Artificial Pancreas (AP). Method: In this paper we present a new formulation of the cost function for an MPC utilizing a technic which accelerate the speed of control of the AP and tackle the nonlinearity of the control problem via asymmetric objective functions. Finding: The finding of this work consist on a new Model Predictive control algorithm that lead to good performances like decreasing the time of hyperglycaemia and avoiding hypoglycaemia. Conclusion: This performances are validated under in silico trials.

关键词： Artificial Pancreas control algorithm Biomedical control MPC Objective Function Nonlinearity

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IGBT Over Voltage Protection Scheme in Quasi Resonant Induction Heating Applications 12

IGBT Over Voltage Protection Scheme in Quasi Resonant Induct...

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12 IEEE Int C Elect Energy Env Communications Computer control

作者： Jain, Akshat Mallik, Ranajay Catalisano, Giuseppe Abbatelli, Luigi STMicroelectronics Syst LAB Greater Noida India STMicroelectronics PTD Catania Italy

ISBN: (纸本)9781467365406

Induction heating for domestic usage is quite popular and in some countries, it is a highly cost-sensitive product. A single IGBT (Insulated Gate Bipolar Transistor) quasi resonant power stage is the most popular topology for this application. In this paper we explain method in which the topology works reliably irrespective of widely varying input voltage, open loop operation and inconsistent utensil material. A protection scheme involving both hardware and firmware has been discussed. The protection scheme comprises of an efficient control-algorithms and the IGBT behaves as an active self-clamp. An induction cooker/heater prototype of 1.8kW rating has been developed with the proposed protection scheme. The results reveal that the scheme proposed provides an enhanced protection to the IGBT and increases the end product reliability manifold while reducing warranty costs to the manufacturer.

关键词： active self-clamp protection control algorithm open loop operation quasi resonant

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Sizing of Energy Storage System Based on Time Series for providing Frequency Regulation 22

Sizing of Energy Storage System Based on Time Series for pro...

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22nd National Power Systems Conference (NPSC)

作者： Hasan, Sumbul Navalkar, P. V. Gajbhiye, Rajeev Soman, S. A. Indian Inst Technol Dept Elect Engn Mumbai Maharashtra India

ISBN: (纸本)9781665462020

This paper investigates whether energy storage systems (ESS) can be used for providing frequency regulation ancillary services. We have presented two approaches for sizing storage. The first approach looks at the probability distribution function of the net imbalance and derives the size of ESS with 99.8% confidence. The second approach is based on time series in which we have defined a desired frequency time series and have estimated power compensation requirement for each time interval. In this method a detailed account of load model and capacity limits of ESS is presented. The estimated size of ESS obtained using time series based approach is compared with the size estimated using the statistical method and is shown to be significantly smaller. Results are presented for the existing grid conditions using WAFMS (wide area frequency measurement system) data and also for a future scenario with reduced grid inertia.

关键词： Energy storage system frequency regulation ancillary service grid inertia power unbalance sizing of ESS control algorithm

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Demand Response Strategy for the Smart Home with the Distributed Photovoltaic Generation 5

Demand Response Strategy for the Smart Home with the Distrib...

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5th International Conference on Green Energy and Applications (ICGEA)

作者： Miao Guangyao Tian Jingchao Cao Lingguo Zhang Yuyong Ningxia State Grid Corp Mkt Serv Ctr Yinchuan Ningxia Peoples R China Eastern Weston Elect Corp Yantai Peoples R China

ISBN: (纸本)9781728177199

With the gradual development of the power grid in the direction of intelligence, the rigid demand for auxiliary resources included in the dispatch and control range of the power system in the past is increasing. The intelligent power utilization system is the key to solve the problem of distribute individual user in the unified dispatch of the grid center. In this paper, a smart electricity consumption algorithm based on user-side demand is proposed. This method can ensure the user's right of independent choice on the basis of satisfying demand response constraints, realizing the interaction of multiple sources and loads to a certain extent. The main task of this paper is to consider the influence of distributed photovoltaic power on the algorithm and put user selection the first under the constraints of satisfying demand response. Firstly, the model of the intelligent power consumption system is introduced, and the classification of different loads under system control and its power supply model are given. Then, the paper proposes the concept of user choice, considering the calculation method of the priority of household appliances from multiple angles, which is the core of the control system algorithm. The control algorithm not only considers the influence of distributed photovoltaic power sources connected to the power consumption system, but also considers that user can independently select the working mode of distributed photovoltaic power sources. Finally, in the process of designing the control algorithm, the concept of user interruption is put forward, which is that the user has the right to first execute his own decision and jump out of the algorithm under the condition of demand response. In the subsequent simulation verification, the paper carried out the demand response power conflict experiment with and without the distributed photovoltaic power sources. The simulation results verify that distributed photovoltaic power sources can improve the comfort of

关键词： demand response distributed photovoltaic generation priority ranking control algorithm smart home

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Experimental Research of Multiple Switching in a Thyristor controlled Phase Shifter 16

Experimental Research of Multiple Switching in a Thyristor C...

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16th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices

作者： Novikov, Michael A. Rashitov, Pavel A. Astashev, Michael G. Nnamchi, Sylvester C. Natl Res Univ MPEI Moscow Russia JSC GM Krzhizhanovsky Power Engn Inst Moscow Russia

ISBN: (纸本)9781467367196

Special features of processes of switching of thyristor AC bridges, as a part of a high-power thyristor controlled phase shifter (TCPS), are considered. Influence of mutual magnetic coupling of secondary windings of an excitation transformer on an interval of safety switching of a thyristor switch of TCPS is experimentally discovered and theoretically justified. Results of experiments, confirming presence of an effect of serial switching of secondary windings of an excitation transformer in an interval of slow (long period) switching and an effect of acceleration of a process of switching in an interval of fast (shot period) switching, are presented.

关键词： phase shifter thyristor switch thyristor controlled phase shifter (TCPS) control algorithm safety switching

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controlling Arrival Time and Airspeed with Constant Bank Angle Turns

Controlling Arrival Time and Airspeed with Constant Bank Ang...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech Forum)

作者： Stephens, Shawn S. Casbeer, David W. Kunz, Donald L. Baker, William P. Hess, Joshuah A. Air Force Inst Technol Dept Aeronaut & Astronaut Wright Patterson AFB OH 45433 USA Air Force Res Lab Wright Patterson AFB Control Sci Ctr Excellence Wright Patterson AFB OH 45433 USA Air Force Inst Technol Dept Math & Stat Wright Patterson AFB OH 45433 USA

ISBN: (数字)9781624106095

ISBN: (纸本)9781624106095

This research presents a time-of-arrival control algorithm designed to account for the effects of steady-state wind and time-variant terminal constraints. The algorithm is based upon previous research into a control algorithm framework which assumed a ground-fixed reference trajectory in order to improve arrival time performance. This research utilizes a different method to estimate the time to complete a turn with non-zero wind. The arrival time estimate in this paper is based on the principles of aircraft navigation assuming a constant bank angle turn. The performance of the controller was evaluated using a fighter-like aircraft model traveling at 846 ft/s. Static end point simulation results showed the controller was able to achieve less than one second of arrival time error for wind speeds less than 300 ft/s when a feasible arrival time was selected. The moving target results showed the aircraft could perform multiple passes of a target moving at 150 ft/s regardless of direction but could only compensate for a target traveling at 30 ft/s during all non-cooperative scenarios.

关键词： Bank Angle True Airspeed Aircraft Navigation control algorithm Guidance Laws Earth Gaussian Quadrature Flight Testing Unmanned Aerial Vehicle Proportional Navigation

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Design of the electromagnetic mill and the air stream ratio model

Design of the electromagnetic mill and the air stream ratio ...

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20th World Congress of the International-Federation-of-Automatic-control (IFAC)

作者： Wolosiewicz-Glab, M. Foszcz, D. Ogonowski, Sz. AGH Univ Sci & Technol Dept Environm Engn & Mineral Proc Fac Min & Geoengn Krakow Poland Silesian Tech Univ Fac Automat Control Elect & Comp Sci Inst Automat Control Gliwice Poland

Complex mineral raw materials processing is an essential operation in modern industry. Innovative technologies help in constant improving of the efficiency and performance. The paper presents a design of electromagnetic mill, its technological structure and control system. In comparison to conventional solutions, the electromagnetic mill is a fully automated system. It operates in more effective way. The proper selection of the physical and process parameters of the system is crucial for efficiency of the process. The device stands out because of its low energy consumption. The air stream ratio model has been presented for the dry grinding and classification unit with the electromagnetic mill. The concept of the grinding system is described along with indirect measurement methodology. Supervisory control algorithm based on the model structure is derived. (C) 2017, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： grinding control system electromagnetic mill air stream grinding media control algorithm

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Information Hedging from Sensing to Cognition to ensure Coherent Decision Making

Information Hedging from Sensing to Cognition to ensure Cohe...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech Forum)

作者： Kannan, Suresh K. Neogi, Natasha A. Nodein Auton Inc Burlington CT 06013 USA NASA Langley Res Ctr Hampton VA 23666 USA

ISBN: (数字)9781624106095

ISBN: (纸本)9781624106095

This paper illustrates a proof of concept in coupling decision-making with traditional control algorithms for aerospace applications. Autonomy software sometimes requires augmenting conventional control algorithms with arbitrary logic code, rendering stability analysis difficult or impossible. With rigorous convergence results elusive, an alternative is to improve decision-making to the extent possible to maintain the aircraft's overall safety. To illustrate, we introduce a pitch control system that uses a system monitor (cognition) to cluster modules of similar intent to decide on a malfunctioning module's invalidity based on the pilot's intent.

关键词： control Systems control algorithm Neural Networks Pilot Elevator Deflection Elevator National Aeronautics and Space Administration Adaptive control Unmanned Aircraft Pilot in Command

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Performance Evaluation of Tuned PI controller for Power Quality Enhancement for Linear and Non Linear Loads

Performance Evaluation of Tuned PI Controller for Power Qual...

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IEEE International Conference on Recent Advances and Innovations in Engineering (ICRAIE)

作者： Sharma, Ritu Singh, Alka Jha, A. N. ITM Univ Gurgaon India Delhi Technol Univ Dept Elect Engn Delhi India

ISBN: (纸本)9781479940400

In this paper, a 3-leg voltage source inverter (VSI) based Distribution Static Compensator (DSTATCOM) is used for load compensation in 3-phase 3-wire distribution system. The control algorithm is based on Synchronous Reference Frame (SRF) algorithm. This algorithm is used for extracting the reference source currents for power factor correction, load balancing and harmonic reduction. Tuning of PI (Proportional Integral) controller is done using trial and error method and also by Zeigler-Nichols (Z-N) method. Simulations are performed for various load conditions such as a reactive linear load, an unbalanced load and non-linear load. Power factor correction mode (PFC) for DSTA TCOM is tested in MA TLAB environment using SIMULINK and SimPower system toolbox.

关键词： control algorithm DSTATCOM nonlinear load power quality Zeigler-Nichols method

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Functional Monitor Models and Detection Methods for Sensor Data Variance of a Real-Time Cyber-Physical System

Functional Monitor Models and Detection Methods for Sensor D...

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AIAA SciTech Forum

作者： Gelber, Matthew Wyatt, Alex Al Habbal, Ammar Klenk, Robert H. Virginia Commonwealth Univ Dept Elect & Comp Engn Richmond VA 23284 USA

ISBN: (数字)9781624107115

ISBN: (纸本)9781624107115

As Cyber-Physical Systems (CPS) become more integrated into everyday life, the security of these systems must also be considered during their development due to their ever increasing importance. With the increase of physical components in the system, more autonomous control requirements, and increased dependence on proper functionality, verifying system safety and correct operation becomes increasingly difficult. CPS have become more complex through the combination of additional hardware and more interconnected software resulting in many different layers, each one requiring individual security solutions. One example of such a safety-critical CPS embedded system is the Flight control System (FCS) of an Unmanned Aerial System (UAS). An FCS consists of many complex sensors that provide aircraft state information to a central processor, the autopilot, which executes the programmed flight control firmware. Developers of an FCS are dependent on a varying supply chain for the sensors and processors in use, and the trusted delivery of their verified firmware updates to the end user cannot always be guaranteed. Over time, sensor data can become less reliable as sensors can deteriorate resulting in eventual failure. These factors lead to system vulnerabilities from various types of cyber-attacks and physical faults of the sensors on a UAS. Statistical techniques are analyzed for their effectiveness in detecting when specified sensor values begin to exhibit a variance from other trusted sources. A real-time functional run-time assurance architecture and associated detection techniques has been developed to detect such cyber-attacks and sensor data faults in a UAS FCS. The results are demonstrated using an FPGA-based Hardware-in-the-loop Simulation testbed for simulating attacks and the attack detection algorithms to provide the user with information regarding these sensor attacks.

关键词： Barometric Pressure Sensor Cyber Physical System Flight control System Autopilot Hardware in the Loop Simulation Unmanned Aerial Systems Airspeed control algorithm Ground control Station control Charts

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