检索结果-内蒙古大学图书馆

IEEE NW Russia Young Researchers in Electrical and Electronic Engineering Conference (EIConRusNW)

作者： Yeldos A. Altay Artem S. Kremlev Faculty Control Systems and Robotics ITMO University St. Petersburg Russia

ISBN: (数字)9781665404761

ISBN: (纸本)9781665446426

This article presents the results of analysis of measuring ECG signals processing using two new filtering algorithms for low-frequency and high-frequency interference. The presence of such interferences leads to a decrease in the accuracy of the selection of informative components of the measuring signals. To eliminate low-frequency and high-frequency interference, the results of evaluating the effectiveness of two new algorithms for ECG signals are presented. The processing algorithms are based on a polynomial approximation of the high-pass filter and the wide-band notch filter cascade using Newton polynomials. On the basis of these processing algorithms, its performance was analyzed on a priori models of ECG signals and interference, and on the basis of quantitative indicators, its effectiveness was compared with respect to known algorithms. It was found that processing algorithms based on Newton polynomials significantly improve the quality of filtering of measuring ECG signals and indicators of signal-to-noise ratio and mean square error.

关键词： Signal processing algorithms Interference Filtering algorithms Electrocardiography Signal processing Approximation algorithms Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

OUTPUT ADAPTIVE control FOR LINEAR systems UNDER PARAMETRIC UNCERTAINTIES WITH FINITE-TIME MATCHING INPUT HARMONIC DISTURBANCE REJECTION

arXiv

引用

arXiv 2020年

作者： Dobriborsci, Dmitrii Kolyubin, Sergey Bobtsov, Alexey Faculty of Control Systems and Robotics ITMO University St. Petersburg Russia

We consider the task of motion control for non-prehensile manipulation using parallel kinematics mechatronic setup, in particular, stabilization of a ball on a plate under unmeasured external harmonic disturbances. System parameters are assumed to be unknown, and only a ball position is measurable with a resistive touch sensor. To solve the task we propose a novel passivity-based output control algorithm that can be implemented for unstable linearized systems of an arbitrary relative degree. In contrast to previous works, we describe a new way to parametrize harmonic signal generators and an estimation algorithm with finite-time convergence. This scheme enables fast disturbance cancellation under control signal magnitude constraints. Copyright © 2020, The Authors. All rights reserved.

关键词： Linear systems

来源：评论

学校读者我要写书评

暂无评论

RVWO: A Robust Visual-Wheel SLAM System for Mobile Robots in Dynamic Environments

RVWO: A Robust Visual-Wheel SLAM System for Mobile Robots in...

引用

IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Jaafar Mahmoud Andrey Penkovskiy Ha The Long Vuong Aleksey Burkov Sergey Kolyubin Faculty of Control Systems and Robotics ITMO University St. Petersburg Russia

This paper presents RVWO, a system designed to provide robust localization and mapping for wheeled mobile robots in challenging scenarios. The proposed approach leverages a probabilistic framework that incorporates semantic prior information about landmarks and visual re-projection error to create a landmark reliability model, which acts as an adaptive kernel for the visual residuals in optimization. Additionally, we fuse visual residuals with wheel odometry measurements, taking advantage of the planar motion assumption. The RVWO system is designed to be robust against wrong data association due to moving objects, poor visual texture, bad illumination, and wheel slippage. Evaluation results demonstrate that the proposed system shows competitive results in dynamic environments and outperforms existing approaches on both public benchmarks and our custom hardware setup. We also provide the code as an open-source contribution to the robotics community 2 2 https://***/be2rlab/rvwo.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Method of control System Design with Predetermined Overshoot for Optical Axis Servo Drives of SLR Station

Method of Control System Design with Predetermined Overshoot...

引用

IEEE NW Russia Young Researchers in Electrical and Electronic Engineering Conference (EIConRusNW)

作者： Ilya V. Shustov Valery A. Tolmachev Sergey Yu. Lovlin Faculty of Control Systems and Robotics ITMO University St. Petersburg Russia

ISBN: (数字)9781728157610

ISBN: (纸本)9781728157627

The paper considers the method of control system design for optical axis servo drives of SLR station. The method allows to improve accuracy of optical axis servo drives by mean of increasing performance of the inner velocity control loop. The represented analytical equations allow to tune up regulator that provide maximum performance of control system with predetermined overshoot. The obtained analytical equations take into account both elasticity and internal damping of an actuating axis mechanism. The simulation results of the control system of the elevation axis servo drive of the SLR station "Stajer-2 OPU LIK" verify the method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Access control System Based on Face Recognition

Access Control System Based on Face Recognition

引用

International Conference on control, Decision and Information Technologies (CoDIT)

作者： Sergei Shavetov Vladimir Sivtsov Faculty of Control Systems and Robotics ITMO University St Petersburg Russian Federation

ISBN: (数字)9781728159539

ISBN: (纸本)9781728159546

Face recognition is a technology that uses face image of someone to verify his identity by finding this person in a given photos database. It becomes very practical in access control systems as it does not require any physical interaction for gaining access as traditional ways with keys. Moreover, these systems only require a camera for recognition and are easy to install and use. This is why they are already in use by companies as access control to their offices, in home automation systems, *** this paper, different approaches to face recognition are studied. The first step of any face recognition system is face detection and cropping so we analyzed classical Viola-Jones face detection and MultiTask Convolutional Neural Networks (MTCNN) in terms of detection quality and processing *** final classifier obtained is capable of matching face from the online camera to image from a given database. We also considered decreasing the vulnerability of standalone face recognition by adding a spoof detection method so that the system does not react to every approach to bypass the system like showing a photo of an allowed person shown on a phone's screen.

关键词： Face recognition Cameras Access control Face detection Databases Faces Information technology

来源：评论

学校读者我要写书评

暂无评论

Machine Vision for Auto Positioning in the Modular Industrial Equipment: A Case Study

Machine Vision for Auto Positioning in the Modular Industria...

引用

Industrial Cyber-Physical systems (ICPS)

作者： Maxim Ya. Afanasev Yuri V. Fedosov Yuri S. Andreev Anastasiya A. Krylova Sergey A. Shorokhov Kseniia V. Zimenko Mikhail V. Kolesnikov Faculty of Control Systems and Robotics ITMO University St. Petersburg Russia

ISBN: (数字)9781728163895

ISBN: (纸本)9781728163901

The unification principle of industrial equipment involves splitting the installation into interchangeable components, from which the required type of equipment is assembled for specific production tasks according to the order. For the common industrial equipment, zero position setting usually causes no issues. However, for the modular machines with different sizes of modules, the mounting error can be appeared and it has to be corrected automatically. In addition, due to a possible frequent change of equipment during the production process, clamps can wear out, increasing the error. It is necessary to introduce an automatic adjustment of tool position relative to the carriage suspension, implemented using machine vision systems. The cost of video capture equipment and computing tools decreases, and their characteristics, on the contrary, grow. Moreover, algorithms for recognizing markers' position and angle together with augmented reality development tools are also constantly being improved with their application complexity being significantly reduced, which emphasizes the practicability of their use. The paper describes the problem of eliminating the installation error of instrumental modules on a three-axes platform. The proposed method involves the use of a number of reference markers on the platform, its suspension, and on the plug-in modules.

关键词： Production Tools Machine vision Prototypes Cameras Task analysis Software

来源：评论

学校读者我要写书评

暂无评论

Determination of the Finishing Operation Technological Features of an Aircraft Sensor Using The Industrial Internet of Things Tools

Determination of the Finishing Operation Technological Featu...

引用

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

作者： Semyon Yudin Alexey Mikhailov Sergey Tretyakov Faculty of Control Systems and Robotics ITMO University Saint-Peterburg Russian Federation

A study of the plane-parallel surfaces finishing process of high-precision parts was carried out. The architecture of the IIoT environment based on the Winnum Platform for a double-acting flat-finishing machine has been developed. The requirements for surface roughness and the tolerance of flatness and parallelism are considered, and the reasons for their magnitude are determined. The analysis of studies on technological issues of manufacturing aircraft vibration sensors has been carried out. The types of technological finishing operation are considered, as well as the process of machine finishing of flat parallel surfaces for a double-acting flat-finishing machine is described. The kinematics of the finishing operation is considered. The need for the development of recommendations for determining the rational technological modes of finishing is revealed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Comparative Analysis of Modeling of a Magnus Effect-Based Wind Energy System

Comparative Analysis of Modeling of a Magnus Effect-Based Wi...

引用

IEEE NW Russia Young Researchers in Electrical and Electronic Engineering Conference (EIConRusNW)

作者： Marina Babayeva Artur Abdullin Nikolay Polyakov Gorshkov Konstantin Faculty of Control Systems and Robotics IFMO University St. Petersburg Russia

ISBN: (数字)9781728157610

ISBN: (纸本)9781728157627

In the present work, we consider a model of the electric drive of a wind generator based on the Magnus effect with a load. A brief explanation of the use of the Magnus effect for electricity-generating is presented. The physical implementation of a wind generator based on the Magnus effect is explained. The integration of the developed 3D model of the generator into the Matlab environment is carried out. An analytical mathematical model is developed using Matlab Simulink. A comparative analysis of the work of two variants of mathematical models is carried out. An analysis of the performance of the electrical generator and the minimum required wind flow to cover the generator's own costs is made.

关键词： Generators Mathematical model Force Blades Shafts Wind turbines Torque

来源：评论

学校读者我要写书评

暂无评论

One-Stage Adaptive Observer For Induction Motors *

One-Stage Adaptive Observer For Induction Motors *

引用

International Conference on control, Decision and Information Technologies (CoDIT)

作者： Alexey Ovcharov Alexey Vedyakov Madina Sinetova Faculty of Control Systems and Robotics ITMO University St. Petersburg Russia

ISBN: (数字)9798350373974

ISBN: (纸本)9798350373981

The paper introduces a new state observer for the non-linear model of a voltage-fed induction motor (IM) with unknown rotor resistance and load torque. The only measurements available are the stator current and the control voltage. Compared to the recently introduced observer for IM, which is based on the Dynamic Regressor Extension and Mixing Adaptive Observer (DREMBAO) approach, the proposed observer estimates rotor speed and magnetic flux simultaneously, eliminating the need for a two-stage sequential estimation process. Additionally, the proposed solution considers viscous friction in the motor model, which is not taken into account in the aforementioned approach or other similar ones. The problem is solved using the Generalized Parameter Estimation-Based Observer (GPEBO) approach, which transforms the observer problem into a parameter estimation task. Simulations are also presented to support the theoretical claims and illustrate the performance of the solution.

关键词： Adaptation models Induction motors Voltage measurement Friction Linear regression Rotors Transforms Observers Voltage control Load modeling

来源：评论

学校读者我要写书评

暂无评论

RSSI-Based Evaluation of Wireless Personal Area Networks Nodes Noise Immunity in Industrial Buildings

RSSI-Based Evaluation of Wireless Personal Area Networks Nod...

引用

International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)

作者： A.A. Krylova M.V. Kolesnikov M.Ya. Afanasev Yu.V. Fedosov Yu.S. Andreev S.A. Shorokhov K.V. Zimenko Faculty of Control Systems and Robotics ITMO University St. Petersburg Russia

ISBN: (数字)9781728169514

ISBN: (纸本)9781728169521

Results of a study of the influence of manufacturing environment factors on wireless personal networks are presented in the paper. A classification of such factors is proposed, and the noise immunity of wireless personal networks is determined using a real production as an example. A method for evaluating noise immunity based on a received signal strength indicator (RSSI) is proposed. RSSI values can be obtained natively from almost any receiver and transmitter, which makes this method affordable compared to using network analyzers and other specialized equipment. In the conducted experiment the receiver and transmitter were located at a distance ranging from 0.5 to 25 m from each other. The act of signal transfer was carried out alternately under the influence of each production environment factor. Then measured RSSI values were analyzed and converted into the maximum permissible distance between the receiver and the transmitter in accordance with the proposed method. As a result, data on the influence of a production environment on the noise immunity of wireless personal networks was obtained. Nevertheless, it is concluded that the influence is not significant enough to decide against the use of wireless personal networks, since the influence of many factors can be offset by the use of mesh topology and a dense arrangement of receivers and transmitters. The results are particularly interesting in the context of manufacturing digitalization, where the wireless method of data transmission from field level sensors becomes preferable to the wired due to the requirement for flexibility and mobility of a production process.

关键词： Production Wireless communication Wireless sensor networks Wireless personal area networks Manufacturing Transmitters Immune system

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：