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作者： Attila Balint Universitat Politecnica de Catalunya (UPC)

学位级别：硕士

With the proliferation of variable energy sources, flexible energy loads will become more and more important to help stabilize the energy grid. Increasing electrification of heating systems means that the thermal inertia of buildings and hot water vessels can provide a widespread, low cost alternative to electrical storage for providing this energy flexibility. In this thesis, I demonstrate the modelling capabilities and generalizability of state of the art machine learning techniques on residential hot water systems, using data from multiple large scale real world case studies. I exhibit that an improved control algorithm with these models is capable to reduce the energy consumption of these hot water systems by up to 30%. I also use these models to quantify the effect of major factors influencing available energy flexibility of residential hot water systems. All the houses considered in the analysis feature the same type of hot water system which eliminates any differences in energy flexibility caused by device characteristics. A number of metrics are used from existing literature to quantify flexibility, and find that ambient conditions, control algo- rithm and occupant behaviour all play significant but very different roles. There are also some key differences in the way these factors influence energy demand and flexibility. The available capacity and recovery periods can differ by as much as two to four times for the same storage vessel, meaning that these differences have to be taken into account during operational planning with flexible loads. We conclude with a discussion on the implications of hot water system modelling and its generalizability, the variations in flexibility they can provide and the controllers that can be adopted to influence it in practice.

关键词： hot water systems residential buildings modelling energy flexibility oc-cupant behaviour heat pumps control algorithm

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Fault tolerant single-phase capacitor start capacitor run induction motor powered with cascaded multilevel quasi impedance source inverter

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JOURNAL OF ENGINEERING-JOE 2019年第17期2019卷 4036-4040页

作者： Rahman, Syed Meraj, Mohammad Iqbal, Atif Ben-Brahim, Lazhar Alammari, Rashid Abu-Rub, Haitham Qatar Univ Dept Elect Engn Doha Qatar Texas A&M Univ Dept Elect & Comp Engn Doha Qatar

In this study, the performance of fault tolerant single-phase capacitor start capacitor run induction motor powered using seven-level quasi-impedance source inverter (qZSI) is analysed. The seven-level inverter consists of three units of qZSI connected in cascade. When one of the qZSI module fails (due to semiconductor failure), the resultant rms voltage applied to the motor will be reduced by one-third. This leads to reduction in both mechanical speed and electromagnetic torque of the motor. To restore the performance of the motor to pre-fault condition, the voltage deficit must be compensated. In conventional CHB inverter, it is not possible to achieve the pre-fault voltage. However, in qZSI, it is possible to achieve required voltage boost by application of shoot through duty cycle. Here, voltage of other two healthy operating modules can be boosted to reach pre-fault inverter output voltage during post-fault condition. The maximum voltage boost achievable is limited by the maximum shoot-through duty cycle which is related with modulation index. To verify the concept, simulation results of single-phase capacitor-start capacitor-run induction motor with or without proposed control algorithm are discussed. Experimental results for the proposed algorithm with RL load are discussed.

关键词： machine control starting torque invertors fault tolerance induction motors velocity load (electric) electric impedance qZSI module pre-fault condition fault tolerant single-phase capacitor start capacitor run induction motor CHB inverter cascaded multilevel quasi impedance source inverter RL load control algorithm modulation index maximum shoot-through duty cycle rms voltage boost electromagnetic torque mechanical speed

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Accelerated model predictive controller for artificial pancreas

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INTERNATIONAL JOURNAL OF MODELLING IDENTIFICATION AND control 2018年第3期30卷 229-238页

作者： El Hachimi, Mohamed Ballouk, Abdelhakim Khelafa, Ilyass Baghdad, Abdennaceur FST Mohammedia Univ Lab Elect Energy Automat & Data Proc LEEA & TI BP 146 Mohammadia 20650 Morocco

This work consists of a contribution to the artificial pancreas (AP) development by introducing new techniques of control based on an acceleration of reference tracking by using a variable penalisation of the cost function instead of fixed and arbitrary penalisation, two new functions of the weighting factors are introduced in the formulation of the control algorithm. This method allows a rapid rejection of meal disturbance, a reduction of glucose peak and a complete avoidance of hypoglycaemia. The developed controller performances are evaluated in silico test which is equivalent to animal test using the UVa/Padova simulator.

关键词： artificial pancreas AP reference tracking weighting factors control algorithm disturbance hypoglycaemia

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Efficiency loss breakdown for synchronous rectification scheme for automotive applications

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JOURNAL OF ENGINEERING-JOE 2019年第17期2019卷 3715-3719页

作者： Sarafianos, Dimitrios Llano, Danilo X. McMahon, Richard Flack, Timothy Pickering, Stephen Univ Cambridge Elect Engn Div Cambridge CB3 0FA England Univ Warwick WMG Coventry CV4 7AL W Midlands England JaguarLandRover Ltd Coventry W Midlands England

This article presents a synchronous rectification scheme using a six-phase Lundell alternator and a bespoke MOSFET-based active rectifier. The control of the alternator-rectifier system is divided into the hysteresis DC-link voltage control and the switching pattern algorithm. The first allows to keep the DC-link voltage at the required 14V level, while the latter reproduces the same switching pattern as that of a passive rectifier. The system is tested at three different speeds and the results are compared against the body diodes of the MOSFETs in the active rectifier. The harmonic analysis of the generated waveforms indicates the capability of the control algorithm to generate the same switching pattern of a passive rectifier. Finally, the efficiency measurements illustrate a significant efficiency improvement using a synchronous rectification scheme and MOSFETs with low on-resistance.

关键词： rectifiers rectifying circuits alternators rectification semiconductor diodes voltage control harmonic analysis DC-DC power convertors automotive electronics MOSFET hysteresis DC-link voltage control switching pattern algorithm required 14V level passive rectifier control algorithm synchronous rectification scheme efficiency loss breakdown automotive applications six-phase Lundell alternator bespoke MOSFET-based active rectifier alternator-rectifier system voltage 14 0 V

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Simulation As A Tool In Designing And Evaluating A Robotic Apple Harvesting System

Simulation As A Tool In Designing And Evaluating A Robotic A...

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6th International-Federation-of-Automatic-control (IFAC) Conference on Bio-Robotics (BIOROBOTICS)

作者： Wang, Heng Hohimer, Cameron J. Bhusal, Santosh Karkee, Manoj Mo, Changki Miller, John H. Washington State Univ Tricities 2710 Crimson Way Richland WA 99354 USA Washington State Univ CPAAS 24106 N Bunn Rd Prosser WA 99350 USA

During the past several years, significant effort has been made to develop a robotic system to harvest fresh market apples in a modern apple orchard at Washington State University (WSU). This system has gone through several modifications to achieve enhanced system accuracy, speed, robustness, and reduction of fruit damage and cost. However, due to the short window of apple picking each year and the challenging environment of the orchard, those modifications had limited success in improving the robotic systems performance even with extensive laboratory testing before each field trial. To further assess potential problems, better prepare for the field trial, and make best use of the limited time in the field, in silico testing is necessary in addition to laboratory testing. In this work, computer modeling and simulation were used to help identify potential problem in the robotic system, evaluate the effectiveness of the newly made modifications, and aid in both algorithm development and configuration design of the system. By doing simulations with field study data and workspace analysis of the system, we developed a novel algorithm to improve the reachability of the picking arm. We also concluded that the overlap of the arm's workspace and the fruit space is the key in deciding the reachability of the manipulator instead of the volume of arm's workspace. (C) 2018, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Computer simulation Agricultural robot Workspace analysis control algorithm

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Design of a First-order Annular Inverted Pendulum System

Design of a First-order Annular Inverted Pendulum System

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作者： Zheng Fu Rong Li Henan industrial technician college

In this paper,a ring inverted pendulum system is *** rotating arm is driven by a motor to move back and *** the pendulum rod to do reciprocating motion perpendicular to the *** controlling the pendulum bar from the vertical state to the vertical state,the validity of the control algorithm is *** show that the system can realize the stability control of inverted pendulum and is used to study the effectiveness of the algorithm.

关键词： inverted pendulum system control algorithm stability control

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Fast Disturbance Rejection in MIMO Process Based on algorithms Switching 22

Fast Disturbance Rejection in MIMO Process Based on Algorith...

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22nd International Conference on System Theory, control and Computing (ICSTCC)

作者： Lupu, Ciprian Secuianu, Florin-Dan Mihai, Cosmin-Constantin Petrescu, Catalin Univ Politehn Bucuresti Dept Automat Control & Syst Engn Bucharest Romania

ISBN: (纸本)9781538644447

The restrictions imposed on real-time functioning are sometimes particularly severe and require firm action. At the same time, the design of the control algorithms for perturbations rejection includes a multitude of theoretical and practical solutions that exist in the literature. Here, we can note the methods based on robustification, on algorithms with specific degrees of freedom, etc. The paper presents a method based on the very rapid switching of the control algorithms, proposing at the same time a new switching method. The solutions proposed are tested on an MIMO process in a real time application in the vehicle control area.

关键词： real time switching disturbance rejection control algorithm automotive

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An Approach to Minimize the VA Size of UPQC-S and its Performance Comparison

An Approach to Minimize the VA Size of UPQC-S and its Perfor...

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IEEMA IEEE Engineer Infinite Conference

作者： Hasan, Mashhood Singh, Bhim Ansari, Abdul Quaiyum APJAKTU Coll Engn & Technol Elect Engn Galgotias Gr Noida Luknow India Indian Inst Technol Delhi Elect Engn Indian Inst Technol New Delhi India Jamia Millia Islamia Elect Engn New Delhi India

ISBN: (纸本)9781538611388

The unified power quality conditioner (UPQC) with injection of voltage with respect to supply current at definite angle (UPQC-S) exhibits unique characteristics as opposed to the injection of voltage in-phase (UPQC-P) or in-quadrature (UPQC-Q) of the supply current. The UPQC-S comprises series and shunt converters. The series converter shares the reactive powers of shunt converter and reduces burden of UPQC under normal operating conditions. The reactive power sharing of a series converter depends on phase angle and, therefore, it has been optimized to minimize the VA size of the UPQC-S. In this work an algorithm is proposed to minimize the VA size of the UPQC-S. The optimized angle is verified using graphical approach under different power factor of the load and also under different voltage sag. Moreover, optimized VA size of UPQC-S is compared with the UPQC-Q and UPQC-P for 0% to 50% of the voltage sag. A comparative analysis is presented to understand the worth of various control approaches of the UPQC. A comprehensive mathematical evaluation is also presented under normal and voltage sag/swell conditions of the AC mains.

关键词： AC mains control algorithm Optimization Voltage sag/swell VA size

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The research on the application of intelligent robots in small storage and logistics based on improved PID control algorithm

The research on the application of intelligent robots in sma...

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2nd International Conference on Advanced Design and Manufacturing Engineering (ADME 2012)

作者： Hu Ke-man Hu Hai-yana Ningbo Polytech Ningbo Zhejiang Peoples R China

ISBN: (纸本)9783037855034

Studying on PID control algorithm and through the analysis of the control parameter of scalar part, integration part and derivation part, the author investigates systematically on the motion control system of the intelligent robots in small storage and logistics, and presents an improved PID control algorithm. The improved PID control algorithm not only maintains the merits of the original one, but also simplifies the multifarious adjustment process of the control parameters of scalar part, integration part and derivation part. The improved algorithm turns out to be effective after the simulation and verification by the MATLAB and can be applied and promoted to other practical controls field.

关键词： PID algorithm control algorithm MATLAB simulation robot

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The Structure and algorithm for controlling the Shut-off Valves of a Multi-section Mobile Car Gas Refueler 9

The Structure and Algorithm for Controlling the Shut-off Val...

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9th Annual International Conference of the Biologically-Inspired-Cognitive-Architectures-Society (BICA) held as part of the Joint Multi-Conference on Human-Level Artificial Intelligence (HLAI)

作者： Evstifeev, Andrew A. Zaeva, Margarita A. Natl Res Nucl Univ MEPhI Moscow Engn Phys Inst Kashirskoe Shosse 31 Moscow 115409 Russia LLC Gazprom VNIIGAZ 5537 Proyektiruyemyy Proyezd15-1 Village Razvilka 142717 Moscow Region Russia

An embodiment of the structure and control algorithm of the isolation valve of multi-section mobile car refueling. It is shown that this option provides the most energy efficient and rational option for refueling consumers. The calculation of the most rational pressure, number and volume of sections is performed. The algorithm of control is based on the modified algorithm of multicriteria selection of the Edgeworth-Pareto. (C) 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the 9th Annual International Conference on Biologically Inspired Cognitive Architectures.

关键词： control algorithm multicriteria selection Edgeworth-Pareto multi-section mobile car refueling

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