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Railway Train Device Fault Causality Model Based on Knowledge Graph

Railway Train Device Fault Causality Model Based on Knowledg...

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International conference on Sensing, diagnostics, Prognostics, and control (SDPC)

作者： Yu Zeng Yong Qin Dian Liu Yong Fu Ming Gong Xinning Zhang State Key Lab Rail Traffic Control & Safety Control Beijing Jiaotong University Beijing China Beijing Zongheng Electromechanical Technology Co. Ltd Beijing China CRRC Research Institute CRRC Co. Ltd Beijing China CRRC Co. Ltd Beijing China

ISBN: (数字)9781728170503

ISBN: (纸本)9781728170510

The safe operation of railway train is very important to the safety of the railway system. Therefore, it is necessary to master the failure rules and causes of the railway train devices. However, the current common fault analysis methods have some shortcomings, such as complicated compilation process and insufficient expression. Therefore, we choose to use the knowledge graph technology. Firstly, the common faults of railway train devices are obtained through the statistics of real fault data; secondly, the causes of faults are analyzed and the fault tree is established; thirdly, the ontology of railway train system is modeled according to the idea of fault tree construction; finally, the logical relationship between ontology is established according to the ontology model, and the railway train device fault causality model based on knowledge graph is established.

关键词： Knowledge engineering Analytical models Ontologies Rail transportation Data models Cognition Fault trees

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Grid current control in the unstable mode of plasma discharge

Grid current control in the unstable mode of plasma discharg...

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International conference on PhysicA.SPb

作者： Mustafaev, A. Klimenkov, B. Grabovskiy, A. Kuznetsov, V. St Petersburg Min Univ St Petersburg Russia RAS Ioffe Inst St Petersburg Russia

The paper presents the results of studies of the effect of grid current control of triode cesium-barium vapor modulator in the unstable mode of plasma discharge. The possibility of effective modulation of the current due to the development of nonlinear plasma structures formed during the excitation of the electronic instability of Bursian-Pierce is discovered. It is shown that in this mode, in the interelectrode gap, a potential distribution with a virtual cathode is formed, leading to a break of the electron current. In this case, the current in the triode changes almost instantaneously, since the process of the formation of a virtual cathode proceeds over a time of the order of the electron travel time through the gap. This is especially important for the successful practical application of triode modulators. The achieved high transient rates had a positive effect on the efficiency and frequency characteristics of the device. A high electric strength has been implemented, which allows to keep the triode in the locked state after a current break for a long time.

关键词： Plasma diagnostics

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Experimental investigation of single point incremental forming of aluminium alloy foils 16

Experimental investigation of single point incremental formi...

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16th IMEKO TC10 conference 2019 on Testing, diagnostics and Inspection as a Comprehensive Value Chain for Quality and Safety

作者： Paniti, Imre Viharos, Zsolt János Harangozó, Dóra Centre of Excellence in Production Informatics and Control Institute for Computer Science and Control of the Hungarian Academy of Sciences Kende u. 13-17 BudapestH-1111 Hungary Centre of Excellence in Production Informatics and Control Institute for Computer Science and Control of the Hungarian Academy of Sciences Kende u. 13-17 BudapestH-1111 Hungary Széchenyi István University Egyetem tér 1. GyőrH-9026 Hungary

ISBN: (纸本)9789299008416

Incremental Sheet Forming is a prosperous process to manufacture sheet metal parts that is well adapted for prototypes or small batch production. Compared to traditional sheet forming technologies this relatively slow process is only profitable for the above mentioned production types but it can be used in different applications in automotive and aircraft industries, in architecture engineering and in medical aids manufacturing. In this paper indirectly obtained axial forming force on Single Point Incremental Forming (SPIF) of variable wall angle geometry were studied under different process parameters. The estimation of the forces on AlMn1Mg1 sheets with 0.22 mm initial thickness is performed by continuous monitoring of servo motor currents. The deformation states of the formed parts were analysed using the ARGUS optical strain measurement system of GOM. Interaction plot of forming speed, incremental depth, tool diameter and lubrication were also reported. © 2019 International Measurement Confederation (IMEKO). All rights reserved.

关键词： Design of experiments

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State assessment method of fire control system based on fusion of grey relational and D-S evidence theory

State assessment method of fire control system based on fusi...

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2019 International conference on Sensing, diagnostics, Prognostics, and control, SDPC 2019

作者： Yingshun, Li Zheng, Min Tong, Weiyan Yi, Xiaojian Dalian University of Technology Dalian China Shenyang University of Technology Shenyang China Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mechatronical Engineering !!!Beijing Institute of Technology Beijing China

ISBN: (纸本)9781728101996

A state assessment method based on fusion of grey correlation analysis and D-S evidence theory is proposed by taking the fire control computer and sensor subsystem of armored equipment as the research object. Firstly, the state evaluation model based on information fusion is established, and the basic knowledge of information fusion technology, D-S evidence theory and grey correlation degree are briefly introduced. Because there are many indicators in the research object and the signals are complicated to process. Therefore, the gray correlation analysis method is used to reduce the redundant index and optimize the index system. Then, the credibility distribution of each index in the reduction set is obtained, and the D-S evidence theory is used to fuse the results of the reduction to obtain the state assessment result. Finally, the gray correlation analysis method and D-S evidence theory constitute a complete information fusion system. The test results of the actual fire control system status data prove that the results are consistent with the prior knowledge, which proves the credibility of the method. © 2019 IEEE.

关键词： Fire control systems

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Improving the planning quality in production planning and control with machine learning 16

Improving the planning quality in production planning and co...

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16th IMEKO TC10 conference 2019 on Testing, diagnostics and Inspection as a Comprehensive Value Chain for Quality and Safety

作者： Ryback, Thomas Lukas, Lingitz Gaal, Alexander Gallina, Viola Gyulai, Dávid Fraunhofer Austria Research GmbH Theresianumgasse 27 ViennaA-1040 Austria Institute for Computer Science and Control [SZTAKI Hungarian Academy of Sciences [MTA Kende Str. 13-17 BudapestH-1111 Hungary

ISBN: (纸本)9789299008416

There are always deviations between production planning and subsequent execution. These deviations are caused by uncertainties, e.g. inaccurate or insufficient planning data (e.g. data quality and availability), inappropriate planning and control systems or unforeseeable events. Production planners therefore use buffers in the form of inventories or extended transitional periods to create possibilities for implementing corrective measures in production control. Buffers, however, lead to increased coordination and control effort and to negative effects, e.g. on inventory, throughput time and capacity utilization. Furthermore, it was found that the reliability of the production plans and thus the planning quality (PQ) can drop down to 25% in the first three days after plan creation [1]. Potentials for more accurate planning remains largely unexploited. The objective of this paper is to investigate the possibilities to increase planning quality. Two approaches are presented, focusing on reducing gaps between master data and predicted data used during the production planning process. © 2019 International Measurement Confederation (IMEKO). All rights reserved.

关键词： Planning

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Proceedings of the 2019 20th International Carpathian control conference, ICCC 2019

Proceedings of the 2019 20th International Carpathian Contro...

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20th International Carpathian control conference, ICCC 2019

ISBN: (纸本)9781728107011

The proceedings contain 159 papers. The topics discussed include: real-world robotic competitions for radiological and nuclear inspection tasks;minimization of vibrations during milling of flexible structures using mechatronic design techniques;robust gain scheduled pi-d controller design for descriptor system;parking house action subsystem control;range sensor-based occupancy grid mapping with signatures;fuzzy algorithm for the eeg signal evaluation;an advanced method of recognizing the state of the technological process in technical diagnostics;computation of fair crew schedules in regular bus transport;and system for automating the search for colored cells in images.

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The use of Kalman Filter in control the Balancing Robot

The use of Kalman Filter in Control the Balancing Robot

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International Carpathian control conference (ICCC)

作者： Agata Nawrocka Marcin Nawrocki Andrzej Kot Faculty of Mechanical Engineering and Robotics AGH University of Science and Technology Krakow Poland

ISBN: (数字)9781728119519

ISBN: (纸本)9781728119526

In this paper describes a project of the gimbal which allows stabilizing devices such a video recorder, sport camera or smartphone during recording video clips. Function of this kind of stabilization including photography and robotics was presented in the introduction. As well as, this chapter includes purpose and scope of the each step of a design process. The next chapter is devoted to discussion of existing commercial solutions and specifying their advantages and disadvantages. Constructional features, that were used in the design of the mechanical part, were specified in the predesign phase based on the carried out review. The third chapter is devoted to the full process of designing devices. The first step was to create a mechanical structure in the CAD program, diagnostics of possible constructional errors and then realising a real mechanical system. Next, the author discusses elements of the electrical system and mutual connection and communication. The next part of the thesis is devoted to description of the way of data reading in the used sensors and the way of their filtration. The rest of the chapter is devoted to the control of the mechanical system. Starting from a linearity testing, through a mathematical model identification and at the end carrying out of control of the system both by a simulation and on physical device. The next chapter is devoted to testing control influence on device stabilization quality and correlating the data.

关键词： Servomotors Gyroscopes Filtration Covariance matrices Kalman filters Accelerometers Microcontrollers

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Integration of automated structure mechanic analyses into production process simulation 16

Integration of automated structure mechanic analyses into pr...

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16th IMEKO TC10 conference 2019 on Testing, diagnostics and Inspection as a Comprehensive Value Chain for Quality and Safety

作者： Schmitz, M.B. Stark, R. Fraunhofer IPK Berlin Germany Fraunhofer IPK Berlin Germany

ISBN: (纸本)9789299008416

To produce individual variants of a given product, each variant has to be assessed with respect to their mechanical integrity. This is usually done in the course of product design by assessing all required variants. However, during the lifetime of a product several changes of the existing variants occur or new variants will be created. In this paper a method is described how to integrate and automate the assessment of the mechanical integrity of the product variants directly into the production process by exploiting modern computer methods and automated set-up of state-of-the-art CAE methods. We show this on a demonstrator of a smart factory, that produces disks which can be customized to a large extend. The disks undergo a milling process, which alters the structural properties of the disks. Generally, it cannot be guaranteed upfront that a variant that can be produced is also strong enough to withstand the loads in the application. Therefore, the integrated FEM analyses are computing and assessing the load cases deduced from the use cases of the disks and the loads that occur during milling and handling in the factory. The assessment of the results is done automatically and if positive the production process is started. © 2019 International Measurement Confederation (IMEKO). All rights reserved.

关键词： Finite element method

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Assessing algorithm of the risk potential of critical infrastructure of a NPP based on technical and economic indicators 12

Assessing algorithm of the risk potential of critical infras...

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12th International conference "Management of Large-Scale System Development", MLSD 2019

作者： Sakrutina, Ekaterina V. A. Trapeznikov Institute of Control Sciences Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9781728117300

For significant objects of critical information infrastructure, including nuclear facilities, methods for findings anomalies, malfunctions, and diagnostics, as well as operator information support systems (OISS), are playing an increasingly important role in order to increase safety and reliability of operation. One of the tasks to be solved within the framework of the OISS is the task of calculating technical and economic indicators (TEI) and its relation with ensuring the normal operation of NPPs. TEIs characterize the effectiveness, reliability, and longevity of power equipment during its operation. The conditions for optimal operation of nuclear power plants determined in the process of analyzing TEIs. Therefore, the analysis of indicators is one of the essential tasks of the automated process control system of nuclear power plants. The informational task of TEIs in real-time based on data mining and forecast models of the risk potential of the critical infrastructure of the facility will allow operational personnel to take measures in advance to prevent the technological process from exceeding permissible operating limits. © 2019 IEEE.

关键词： Nuclear power plants

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An Efficient Rail Recognition Scheme Used for Piloting Mini Autonomous UAV in Railway Inspection

An Efficient Rail Recognition Scheme Used for Piloting Mini ...

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International conference on Sensing, diagnostics, Prognostics, and control (SDPC)

作者： Yuxin Guo Xiaofeng Li Linmin Jia Yong Qin School of Traffic and Transportation Beijing Jiaotong University Beijing China State Key Lab of Rail Traffic Control &Safety Beijing Jiaotong University Beijing China

ISBN: (数字)9781728170503

ISBN: (纸本)9781728170510

In this paper, a rail recognition scheme is presented to pilot UAV autonomous flying along the track rail. Firstly, the pulse coupled neural network is used to iteratively process the single-channel brightness image and the binary image of the track contour is obtained. Here, the image entropy is adopted as the judgment basis for the stop of iterative processing. Then, the third order Bézier curve is used to fit the contour, and the vanishing point is obtained. Based on the vanishing point and the inverse perspective transformation method, the local flight target point is calculated. Then the yaw and pitch are calculated based on the vanishing point for the next step of inverse perspective transformation to calculate the local flight target point. Finally, the angle between flight direction and target point is calculated to pilot the UAV flying along the track. To speed the processing, CUDA based parallel programming in NVIDIA TX2 is adopted. In the end, various scene images, including forward flight, side flight, height change of UAV and the influence of invasion objects, are used to test the effective of the scheme presented in this paper. Experiments show that the rail recognition rate is 96.08% and the false alarm rate is 1.80%.

关键词： Rails Target tracking Parallel programming Neural networks Brightness Graphics processing units Rail transportation

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