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International Conference on control systems and Computer Science (CSCS)

作者： Costica Nitu Alexandru Dumitrascu Vladimir F. Krapivin Ferdenant A. Mkrtchyan Department of Automatic Control and System Engineering University Politehnica of Bucharest Bucharest Romania Kotelnikov Institute of Radioengineering and Electronics Russian Academy of Sciences Moscow Russian

ISBN: (纸本)9781479917815

Agricultural risks are discussed because of the disasters related to the water regime disturbance. Different tools are considered in framework of the remote-sensing and in-situ monitoring. Global Information-Modeling system (GIMS) is proposed as effective information technology for monitoring data analysis and processing. The GIMS basis is given. Two versions of optical systems are considered for the water quality diagnostics. Algorithm is proposed to the optical spectral images recognition. Examples of simulation experiments with the GIMS-based tools are given.

关键词： Microwave radiometry Microwave measurement Vegetation mapping Soil moisture Radar Remote sensing

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Development of Smartphone Apps for Skin Cancer Risk Assessment: Progress and Promise

JMIR Dermatology

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JMIR Dermatology 2019年第1期2卷

作者： de Carvalho, Tiago M. Noels, Eline Wakkee, Marlies Udrea, Andreea Nijsten, Tamar Department of Dermatology Erasmus Medical Center Rotterdam Netherlands Department of Automatic Control and System Engineering Polytechnic University of Bucharest Bucharest Romania

Skin cancer is a growing public health problem. Early and accurate detection is important, since prognosis and cost of treatment are highly dependent on cancer stage at detection. However, access to specialized health care professionals is not always straightforward, and population screening programs are unlikely to become implemented. Furthermore, there is a wide margin for improving the efficiency of skin cancer diagnostics. Specifically, the diagnostic accuracy of general practitioners and family physicians in differentiating benign and malignant skin tumors is relatively low. Both access to care and diagnostic accuracy fuel interest in developing smartphone apps equipped with algorithms for image analyses of suspicious lesions to detect skin cancer. Based on a recent review, seven smartphone apps claim to perform image analysis for skin cancer detection, but as of October 2018, only three seemed to be active. These apps have been criticized in the past due to their lack of diagnostic accuracy. Here, we review the development of the SkinVision smartphone app, which has more than 900,000 users worldwide. The latest version of the SkinVision app (October 2018) has a 95% sensitivity (78% specificity) for detection of skin cancer. The current accuracy of the algorithm may warrant the use of this app as an aid by lay users or general practitioners. Nonetheless, for mobile health apps to become broadly accepted, further research is needed on their health impact on the health system and the user population. Ultimately, mobile health apps could become a powerful tool to reduce health care costs related to skin cancer management and minimize the morbidity of skin cancer in the population. ©Tiago M de Carvalho, Eline Noels, Marlies Wakkee, Andreea Udrea, Tamar Nijsten.

关键词： early detection mhealth mobile phone skin cancer smartphone app

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Active Sallen-Key RC-High-Frequency filter based on non-inverting voltage followers 3

Active Sallen-Key RC-High-Frequency filter based on non-inve...

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3rf International Scientific Conference on Metrological Support of InnovativeTechnologies, ICMSIT 2022

作者： Yu Denisenko, D. Prokopenko, N.N. Ivanov, Yu I. Butyrlagin, N.V. Information System and Radio Engineering Department Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Department of Automatic Control Systems Southern Federal University Bolshaya Sadovaya St. 33 Rostov-on-Don344000 Russia Head of Information System and Radio Engineering Department Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Institute for Design Problems in Microelectronics of Russian Academy of Sciences IPPM RAS Zelenograd124681 Russia

A new high-pass filter (HPF) circuit of the second-order Sallen-Key family has been developed and studied, in which independent adjustment of the main parameters is realized -the pole frequency, the quality factor of the pole and the transmission coefficient. The basic equations for the transfer functions and HPF parameters are presented. The results of computer simulation a proposed circuits HPF in CAD Micro-Cap 12 are shown. © Published under licence by IOP Publishing Ltd.

关键词： High pass filters

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Fuzzy logic based cycle-to-cycle control of FES-induced swinging motion

Fuzzy logic based cycle-to-cycle control of FES-induced swin...

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International Conference on Electrical, control and Computer engineering (INECCE)

作者： B.S. K. K. Ibrahim M.O. Tokhi M.S. Huq S.C. Gharooni Department of Mechatronics and Robotics Faculty of Electrical & Electronic Engineering University of Tun Hussein Onn Batu Pahat Johor Malaysia Department of Automatic Control and System Engineering University of Sheffield Sheffield UK

FES induced movement control is a significantly challenging area due to complexity and non-linearity of musculo-skeletal system. The goal of this study is to design a cycle-to-cycle control of FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated by controlling the amount of stimulation pulsewidth. This time dependent behaviour is successfully compensated for using a cycle-to cycle fuzzy controller, which computes the amount of knee extension stimulation on the basis of the achieved flexion angle in previous cycles. The capability of fuzzy control in automatic generation of stimulation burst duration is assessed in computer simulations using a musculo-skeletal model. This paper presents the development of a fuzzy logic control scheme based on discrete-time cycle to cycle control strategies without predefined trajectory. The results show the effectiveness of the approach in controlling FES-induced swinging motion.

关键词： Knee Joints Mathematical model Trajectory Computational modeling Muscles Fuzzy logic

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Subspace based nonlinear multichannel blind identification/equalization

Subspace based nonlinear multichannel blind identification/e...

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15th IFAC Symposium on system Identification, SYSID 2009

作者： Gómez, Juan C. Baeyens, Enrique Poolla, Kameshwar Laboratory for System Dynamics and Signal Processing FCEIA Universidad Nacional de Rosario Riobamba 245 Bis 2000 Rosario Argentina Department of Systems Engineering and Automatic Control ETSII Universidad de Valladolid Paseo del Cauce s/n 47011 Valladolid Spain Department of Mechanical Engineering University of California at Berkeley 5141 Etcheverry Hall Berkeley CA 94720-1740 United States

ISBN: (纸本)9783902661470

A subspace based approach for the blind identification/equalization of nonlinear Single Input Multiple Output (SIMO) time-invariant channels is presented in this paper. The considered models include, but are not limited to, polynomial approximations of nonlinear channels (i.e., Volterra models), which have been used to represent satellite communications, magnetic recording channels, and physiological processes, among other applications. The channel parameters are estimated in closed form, up to a scalar factor, by computing the column space of the output Hankel matrix, via a Singular Value Decomposition (SVD), and then solving a Least Squares (LS) estimation problem also resorting to an SVD. Numerical simulations are used to illustrate the performance of the proposed algorithms. © 2009 IFAC.

关键词： Singular value decomposition

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Natural trajectory based FES-induced swinging motion control

Natural trajectory based FES-induced swinging motion control

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International Conference on Mechatronics (ICOM)

作者： B. S. K. K. Ibrahim M. O. Tokhi M. S. Huq S. C. Gharooni Department of Mechatronics and Robotics Faculty of Electrical & Electronic Engineering University of Tun Hussein Onn Batu Pahat Johor Malaysia Department of Automatic Control and System Engineering University of Sheffield Sheffield UK

The use of electrical signals to restore the function of paralyzed muscles is called functional electrical stimulation (FES). FES is a promising method to restore mobility to individuals paralyzed due to spinal cord injury. FES induced movement control is a significantly challenging area, mainly emanating from various characteristics of the underlying physiological/biomechanical system. An approach of fuzzy trajectory tracking control of swinging motion optimized with genetic algorithm is presented. The results show the effectiveness of the approach in controlling FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated to perform the swinging motion by controlling the amount of stimulation pulsewidth.

关键词： Knee Joints Mathematical model Trajectory Genetic algorithms Muscles Optimization

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controllability analysis of multi objective control systems

Controllability analysis of multi objective control systems

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IEEE International Symposium on Computer Aided control system Design (CACSD)

作者： P. Stewart G.W. Jewell R.E. Clark P.J. Fleming The Electrical Machines and Drives Group the Department of Electrical Engineering University of Sheffield Sheffield UK The University of Sheffield Sheffield Sheffield GB The Department of Automatic Control and System Engineering University of Sheffield UK

The performance requirements stated in project specifications often comprise conflicting objectives. These objectives may further be a complex mix of steady state and dynamic performance. control devices such as solenoid actuators are often chosen purely on steady state force characteristics, due to the difficulty of appraising the conflicting and generally non-linear nature of the performance objectives. This can have ramifications in terms not only of the actuator performance, but also in the overall controllability of the system when closed-loop control is implemented. An example automotive application examining the multi objective controllability of electronically actuated valves is presented. Multi objective evolutionary techniques are utilised to derive the optimal force-displacement characteristics and also dynamic characteristics of the desired actuator under the constraint of design performance criteria. The selected actuator is then assessed for its controllability and dynamic performance.

关键词： controllability control system analysis control systems Actuators Vehicle dynamics Steady-state Force control Solenoids Appraisal Automotive applications

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Simulator for control and Automation using an interactive and configurable 3D virtual environment

Simulator for Control and Automation using an interactive an...

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Society of Instrument and control Engineers Annual Conference

作者： Adolfo Sanchez del Pozo Juan Manuel Escano Carlos Bordons Department of System Engineering and Automatic Control University of Seville

ISBN: (纸本)9781467322591

The use of simulators greatly facilitates the work of specialists. Their usage produces results that could prevent errors in real systems. Using a simulator for industrial plants would reduce the programming time of their automation. We propose to develop a simulation platform of industrial machinery with 3D virtual reality, to carry out experiments of PLC (Programable Logic controllers) programming. A physic engine will be needed to be integrated in the application with a graphic interface which will be used to design, to programm and to visualize the simulation of the plant. Showing the first results of a first prototype, being the most general possible in programming to demonstrate the possibilities of such software both educational and commercial.

关键词： Simulator 3D Virtual reality PLC Industrial Collision OPC

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Quadriceps muscle models using fuzzy logic and ANFIS

Quadriceps muscle models using fuzzy logic and ANFIS

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IEEE International Conference on system engineering and Technology

作者： S. M. Salleh R. Jailani M. O. Tokhi Neuromuscular Rehabilitation Research Group Universiti Teknologi MARA Malaysia Shah Alam Selangor Department of Automatic Control and System Engineering University of Sheffied United Kingdom

This paper presents a development of quadriceps muscle models using ANFIS and Fuzzy Logic based on Functional Electrical Stimulation (FES). The models inputs parameter consists of stimulation frequency, pulse width, and sampling time are used to predict quadriceps output torque. The muscle models developed are then validate with the clinical data to evaluate the accuracy of the torque output predicted with the identified parameters. In this study, Fuzzy Logic muscle model gives better performance representing quadriceps muscle model.

关键词： Muscles Fuzzy logic Data models Force Mathematical model Biological system modeling Neuromuscular stimulation

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Coordination strategy for a system of manipulators coupled via a flexible object

Coordination strategy for a system of manipulators coupled v...

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International Conference on Industrial Electronics, control and Instrumentation

作者： M.M. Svinin M. Uchiyama Aeronautics and Space Engineering Department University of Tohoku Sendai Miyagi Japan Automatic Control Department System Theoryand Robotics Section Darmstadt University of Technology Darmstadt Hessen Germany

This paper presents a control strategy for N robot arms cooperating through a flexible object. The dynamic equations of the system under consideration are described, with position and force parameters being considered in an extended 6N-dimensional space. The control strategy is based on the decomposition of the position and the force parameters. The strategy includes feedforward and feedback levels, which take into account the object compliance. The force and the moments applied to the object by manipulators as well as the end-point accelerations are considered to be the control inputs for the Cartesian-level control system. The feedback level includes the nonlinear decoupling central law to ensure the tracking of the object trajectories in the position and the force spaces. To damp out the object oscillations, an additional control input, which is added to the prespecified internal forces, is introduced. The applicability of the control strategy is tested under a case study.< >

关键词： Force control control systems Force feedback Manipulator dynamics Robot kinematics Orbital robotics Equations Acceleration Trajectory Testing

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