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Coming of age: the artificial pancreas for type 1 diabetes

DIABETOLOGIA 2016年第9期59卷 1795-1805页

作者： Thabit, Hood Hovorka, Roman Univ Cambridge Wellcome Trust MRC Inst Metab Sci Inst Metab Sci Addenbrookes Hosp Level 4Box 289Hills Rd Cambridge CB2 0QQ England Cambridge Univ Hosp NHS Fdn Trust Dept Endocrinol & Diabet Cambridge England Univ Cambridge Dept Paediat Cambridge England

The artificial pancreas (closed-loop system) addresses the unmet clinical need for improved glucose control whilst reducing the burden of diabetes self-care in type 1 diabetes. Glucose-responsive insulin delivery above and below a preset insulin amount informed by sensor glucose readings differentiates closed-loop systems from conventional, threshold-suspend and predictive-suspend insulin pump therapy. Insulin requirements in type 1 diabetes can vary between one-third-threefold on a daily basis. Closed-loop systems accommodate these variations and mitigate the risk of hypoglycaemia associated with tight glucose control. In this review we focus on the progress being made in the development and evaluation of closed-loop systems in outpatient settings. Randomised transitional studies have shown feasibility and efficacy of closed-loop systems under supervision or remote monitoring. Closed-loop application during free-living, unsupervised conditions by children, adolescents and adults compared with sensor-augmented pumps have shown improved glucose outcomes, reduced hypoglycaemia and positive user acceptance. Innovative approaches to enhance closed-loop performance are discussed and we also present the outlook and strategies used to ease clinical adoption of closed-loop systems.

关键词： Artificial pancreas Closed-loop system Continuous glucose monitor control algorithm Insulin pump Review Type 1 diabetes

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Study on the synchronous closing strategy of 10 kV reactive power compensation capacitor banks

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INTERNATIONAL JOURNAL OF MODELLING IDENTIFICATION AND control 2016年第4期26卷 353-360页

作者： Du, Qinjun Xu, Shuai Wang, Yang Shandong Univ Technol Sch Elect & Elect Engn 12 Zhangzhou Rd Shandong Zibo 255091 Peoples R China

In this paper, we propose a closing strategy when the compensation capacitor and system voltage come to the peak voltage, the method of capacitor banks synchronous closing sequence is analysed, and the shortest delay time to switch closing in optimal phase is given. In order to improve the breaker synchronous closing precision, the adaptive digital AC voltage zero crossing detection is adopted to acquire the zero point of the reference signal, and the method of multi-element liner regression is handled to dynamic predict the breaker operating time and trend. Theoretical analysis and simulation result show that the transient overvoltage and inrush current when closing capacitor banks at peak voltage are decreased effectively, which offers the basis of theory and software algorithms for the development of a synchronous switching control system of compensation capacitor.

关键词： reactive power compensation capacitor banks synchronous closing zero crossing detection motion control control algorithm

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A vibrational approach to Slag Sensing System: development and industrial application

A vibrational approach to Slag Sensing System: development a...

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8th IFAC Conference on Manufacturing Modelling, Management and control (MIM)

作者： Piccinini, A. Campagnoni, V. Pesenti Ierace, S. Floreani, F. Univ Bergamo Dipartimento Ingn Gest Informaz & Prod I-24044 Dalmine BG Italy ConsorzioIntellimech I-24126 Bergamo BG Italy

Today the increased competitiveness of global market forces companies to provide products and services with quality standards ever higher at lower costs. In this sense, both technological development and innovation, as strategic factor, drive companies to invest in development of smart applications that allows to increase global efficiency and improves the quality, understood as satisfaction of the client. In Continuous Casting Production (CCP), for example, this means Slag Sensing System (SSS) improvement in order to obtain better purity of molten steel and at the same time to reduce the maintenance costs associated with the implantation of casting. After an overview of SSS currently used in industry, this paper deals with vibrational analysis and characterization of the process of CCP to develop an on-line real-time application of vibrational method for slag detection. At first time domain and frequency domain analysis is performed to characterize the vibrations associated with the plant, subsequently, on the base of obtained results, a control algorithm is developed and the related software is coded, in order to drive the closing of the nozzle valve in a real industrial application. (C) 2016, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： vibrational slag detection ladle slag carry-over continuous casting process control algorithm real-time system industry automation quality assessment

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AUTOMATIC DIFFERENTIAL LOCK control IN A TRUCK – STRAIGHT DRIVE

AUTOMATIC DIFFERENTIAL LOCK CONTROL IN A TRUCK – STRAIGHT D...

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作者： Kučera, Pavel Brno University of Technology

The paper deals with the creation of control algorithm for locking differential of the truck. This algorithm is based on assumptions of the ZF ADM system and it is created using software Simulink-Stateflow. The article describes the function of algorithm and its application to the computational model of vehicle with 4x4 drive. In conclusion, a simulation of driving manoeuvres is done to verify the functionality of the assembled control algorithm of the differential.

关键词： control algorithm Simulink Stateflow Computational Model of Vehicle Differential

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Motor controller design of patient transfer apparatus

Motor controller design of patient transfer apparatus

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IEEE International Conference on Information and Automation (ICIA)

作者： Wang, Hongbo Liu, Zhengcao He, Xuefeng Niu, Jianye Lan, Zhi Yanshan Univ Parallel Robot & Mechatron Syst Lab Hebei Prov Qinhuangdao Peoples R China Natl Res Ctr Rehabil Tech Aids Beijing Peoples R China

ISBN: (纸本)9781509041022

A motor controller based on STM32F103 MCU, which is designed for the patient transfer apparatus is presented. Firstly, according to the working principle of the apparatus, the power of the motor is calculated, and the selection of the motor is carried out. According to the chosen motor, the controller's hardware circuit design is carried out. According to the need of apparatus control, the controller adopts the double loop speed control algorithm which is added with the speed forward feed control. The controller has two operation modes, torque mode and speed mode, and the two modes can be switched flexibly during the work process. The controller uses CAN bus communication, makes the network control more easily. A controller parameters debug software programed with QT makes it easy to setup the controller parameters. The software can greatly shorten the time of parameter adjustment. Finally, the related experiment is carried out, and the result indicates that the controller can complete the control task well.

关键词： patient transfer apparatus motor controller control algorithm debug software

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Lighthouse Localization for Unmanned Applications

Lighthouse Localization for Unmanned Applications

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IEEE Systems and Information Engineering Design Symposium (SIEDS)

作者： Gibson, Jonathan Haseler, Carl Lassiter, Holt Liu, Rangjun Morrow, Gage Oslund, Ben Zrimm, Mike Lewin, Greg Univ Virginia Charlottesville VA 22903 USA

ISBN: (纸本)9781509009701

One of the most important factors in the successful application of unmanned vehicles is the ability to determine where a vehicle is in relation to its local environment. While GPS technology works well in most locations, the satellite coverage necessary for this technology to function is not available in cluttered environments and inside buildings. Current technological workarounds involve high resolution image processing, which is expensive in terms of both monetary and computational cost. Our project team is working to develop an alternative localization solution for drones that uses low cost lasers and off-the-shelf components. The technique involves setting up two or more "lighthouse" beacons in a controlled environment. The beacons will pulse invisible infrared light from LEDs and sweep vertical sheets of infrared lasers around the environment. Photodiodes installed on the UGV will respond to these light sources and pass this information to a processor. Based on the timing of the diode response, the angle between the lighthouse and the diodes can be determined. When combined with ultrasonic altitude data, these angles can be processed to determine the location of the diodes and subsequently the location and orientation of the UGV. The accuracy and precision of the final lighthouse system will be assessed to determine its usefulness for localizing drones in a controlled environment. The end goal of the technical project is to design a system that will facilitate the automated driving of a UGV based on localization data from the lighthouse system while being scalable for future implementation in 3D applications.

关键词： control algorithm laser lighthouse localization photodiodes unmanned ground vehicle (UGV)

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Hardware-Software System Test Bench for Studies of a Reciprocating Electrical Machine 2

Hardware-Software System Test Bench for Studies of a Recipro...

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2nd International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM)

作者： Tsvetkov, A. N. Safin, A. R. Gibadullin, R. R. KSPEU Kazan Russia

ISBN: (纸本)9781509013227

The paper describes new engineering solutions at developing a test bench for studying experimental models of reciprocating electrical machines, as well as the hardware-software control system. A crank mechanism was used when developing the bench to create hydraulically driven reciprocating motion. The designed hardware-software system allows for controlling the bench and the test subject due to a large number of inputs and outputs of various applications. The sensors integrated into the bench enable a complete test picture and sufficient amount of high-precision data. A high flexibility of the bench and the test subject control algorithm allows for conducting a wide range of various tests of electrical products.

关键词： reciprocating machine test bench crank mechanism hardware-software system control algorithm

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Advanced Simulation of an Insulin & Glucagon Pump

Advanced Simulation of an Insulin & Glucagon Pump

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International Conference on Information Technology (InCITe) - The Next Generation IT Summit on the Theme - Internet of Things - Connect Your Worlds

作者： Islam, Faraz Khan, Abdul Hameed Ahmedulla Singh, Nishit Ali, Alabbas Alhaj Frankfurt Univ Appl Sci Dept High Integr Syst Nibelungenpl 1 D-60318 Frankfurt Hessen Germany

ISBN: (纸本)9781509026128

Diabetes is an incurable disease where the body is not able to maintain the blood sugar level as the glucose in the blood is not utilize due to the destruction of the beta pancreatic cell of the liver. Blood sugar level of body is a very important factor for health and it should be maintain within the desired level or else this would result in complications and often serious damage to the body. Therefore treatment must be provided in case of high or low blood sugar level. In case of high blood sugar level, insulin must be injected and in case of low blood sugar level we should inject glucagon into the body. This paper is concerned on advanced method of simulation that can be used to implement a real insulin and glucagon pump that can work in real time to prevent the fatal effects of diabetes on body. This system also covers all the safety critical system aspect required to build a system that has a direct effect on human life. To provide better insulin and glucagon management and to reduce the need for human supervision, we have implement a control algorithm for the insulin and glucagon pump to automate the delivery process. The control algorithm adapts the glucose metabolic rate and determine the appropriate amount of insulin or glucagon to be delivered into the body. Method that is followed is effective and efficient in maintaining the blood sugar level. The Graphical User Interface (GUI) of the system is very easy and user friendly that makes it easier for the patient and doctor to use. Different sets of testing were used to insure the safety and efficiency of the insulin pump simulation.

关键词： Diabetes Glucose Metabolic Rate control algorithm Automate Delivery GUI Safety Critical Insulin Glucagon Real-Time

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Actuality of Fuzzy Logic Use for Implementation Pumping Equipment

Actuality of Fuzzy Logic Use for Implementation Pumping Equi...

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IEEE North-West-Russia-Section Young Researchers in Electrical and Electronic Engineering Conference (ElConRusNW)

作者： Kozlova, L. P. Polorotov, N. S. Kozlova, O. A. St Petersburg Electrotech Univ LETI St Petersburg Russia Bonch Bruevich St Petersburg State Univ Commun St Petersburg Russia

This article discusses issues of fuzzy logic actuality use for power costs researching of pumping equipment, emerging problems during the operation and also there are recommendations.

ISBN: (纸本)9781509004454

This article discusses issues of fuzzy logic actuality use for power costs researching of pumping equipment, emerging problems during the operation and also there are recommendations.

关键词： Fuzzy logic pumping equipment power costs monitoring system control algorithm

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REAL-TIME TORQUE RIPPLE MINIMIZATION OF OUTER ROTOR SWITCHED RELUCTANCE MOTOR

REAL-TIME TORQUE RIPPLE MINIMIZATION OF OUTER ROTOR SWITCHED...

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作者： YONGQI LI Texas A&M University

学位级别：硕士

The Switched Reluctance Motor (SRM) is becoming more and more attractive because of its simple structure, robustness and cost-efficiency. It is a good candidate for variable speed applications such as Electric Vehicles (EVs), electric ships, aerospace, wind turbines, etc. However, the SRM inherently suffers from high torque ripple which is the main limitation preventing its use in high-performance applications. To reduce this torque ripple, the turn-on and turn-off angles of the motor phases can be adjusted. In this thesis, the SRM fundamentals are investigated along with the inductance model. For the linear case, the inductance is calculated using the analytical method. The non-linear model is then discussed as an improvement to this method. control loops are designed based on the system block diagrams which are derived from the small signal model. The turn-on angle is calculated according to the operating conditions, and the turn- off angle is varied within a small range. At each combination of turn-on and turn-off angles, torque ripple, which is defined as the summation of the differences between each instantaneous torque and the average torque, is estimated and compared with other combinations. Based on these results, the best firing angle is selected to achieve the minimum possible torque ripple. The method is verified using simulations in Matlab/Simulink and physical experiments. The control algorithm is implemented on a microcontroller for the experiments and it is able to tune the firing angles in real time at different operating conditions. Spectrum analysis of the torque signal is used to prove the reduction of torque ripple.

关键词： switched reluctance motor firing angles torque ripple minimization control algorithm Thesis

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