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Modeling workflows and processes in the cloud ERP platform SAP BTP

AIP Conference Proceedings 2024年第1期2980卷

作者： Stela Stoykova Radoslav Hrischev Automation Information and Control Systems speciality Technical University of Sofia Branch Plovdiv Plovdiv Bulgaria Department of Control Systems Technical University of Sofia Branch Plovdiv Plovdiv Bulgaria

The paper presents a modeling approach for workflows and business processes within a selected cloud ERP platform - SAP Business Technology Platform. The main features and capabilities of the workflow management service are discussed. A one-step approval workflow for capital expenditure is modelled based on the structural blocks available in the development environment SAP Business Application Studio. Appropriate rule service and decision table are developed for the workflow. The one-step approval workflow is incorporated as a process step within a process template for capital expenditure evaluation and a process visibility scenario is simulated.

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Variable-Structure Interval-Based Duffing Oscillator

Variable-Structure Interval-Based Duffing Oscillator

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IEEE International Conference on Electronics and Nanotechnology (ELNANO)

作者： Roman Voliansky Borys Kuznetsov Ihor Bovdui Yuliya Averyanova Ivan Ostroumov Olha Sushchenko Maksym Zaliskyi Oleksandr Solomentsev Kostiantyn Cherednichenko Viktoriia Ivannikova Olena Sokolova Yurii Bezkorovainyi Tatyana Nikitina Oleksii Holubnychyi Department of Electromechanical Systems Automation and Electric Drives National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Kyiv Ukraine Department of magnetism of technical objects Anatolii Pidhornyi Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine Kharkiv Ukraine Air Navigation Systems Department National Aviation University Kyiv Ukraine Aerospace Control Systems Department National Aviation University Kyiv Ukraine Department of telecommunication and radioelectronic systems National Aviation University Kyiv Ukraine Air Transportation Management Department National Aviation University Kyiv Ukraine Business School Dublin City University Dublin Ireland Electromechanical and computer systems department Educational scientific professional pedagogical Institute Ukrainian Engineering Pedagogical Academy Kharkiv Ukraine

ISBN: (数字)9798350368178

ISBN: (纸本)9798350368185

The paper deals with the design of a variable-structure chaotic oscillator for path-planning applications of autonomous mobile vehicles. This oscillator is designed as a result of analysis of the generalized dynamical system. We use interval methods to model such a system and take into consideration its nonlinearities. Our approach offers to replace exactly defined system nonlinear functions with domains where these functions are localized. We define lower and upper boundaries for these domains by using piecewise linear functions. The usage of these functions allows us to rewrite initial nonlinear system equations into linear-like form with linear terms that are defined in some intervals and thus simplify the system model. Piecewise linearity of this model gives us the possibility to analyze the system features by using various control methods. Such a model can be used in both real and complex domains. The consideration of system dynamics in a complex domain allows us to increase the order of the considered system and define a set of operation modes to design a variable-structure system. We show the benefits of our approach by studying the Duffing pendulum and designing its base variable-structure system.

关键词： Performance evaluation Trajectory planning System dynamics Linearity Switches Mathematical models Trajectory Nonlinear systems Oscillators Nanotechnology

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Real-time Hybrid Gait Phase Recognition Algorithm Under Continuous Multimodal Locomotion for Lower Limb Exoskeleton

Real-time Hybrid Gait Phase Recognition Algorithm Under Cont...

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2022 CSAA/IET International Conference on Aircraft Utility systems, AUS 2022

作者： Miao, Yinan Wang, Xingjian Wang, Jiaqi Wang, Shaoping Gavrilov, Alexander I. School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Qingdao Research Institute Beihang University Qingdao266104 China Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang University Beijing100191 China Bauman Moscow State Technical University Department of Automatic Control Systems Moscow105005 Russia

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

Nowadays, exoskeletons' ability to operate in complex environments is increasingly important. It is challenging to obtain an accurate gait phase under continuous multimodal locomotion. A hybrid gait phase recognition algorithm is proposed combining the adaptive-oscillator-based algorithm and the model-based algorithm. The modification law is adopted to make two algorithms amend each other reciprocally. The design of the modification law combines the advantages of oscillator-based algorithms and model-based algorithms. The gait phase estimation results are more accurate via the hybrid gait phase prediction algorithm (GPRA). Therefore, appropriate assistance actuation and higher efficiency are obtained under the complicated multimodal locomotion. An experiment was designed to verify the performance of the hybrid GPRA. As a result, the hybrid GPRA can still produce a high-precision gait phase with low latency even when the locomotion mode switches. The hybrid GPRA can provide accurate gait phase and assistance timing under continuous multimodal locomotion. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Exoskeleton (Robotics)

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High Real-time Locomotion Recognition Algorithm Using Inertial Measurement Units

High Real-time Locomotion Recognition Algorithm Using Inerti...

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2022 CSAA/IET International Conference on Aircraft Utility systems, AUS 2022

作者： Wang, Jiaqi Wang, Xingjian Miao, Yinan Wang, Shaoping An, Mailing Miao, Yiqi Gavrilov, Alexander I. School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Qingdao Research Institute Beihang University Qingdao266104 China Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang University Beijing100191 China Bauman Moscow State Technical University Department of Automatic Control Systems Moscow105005 Russia

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

Human-machine interaction devices (HMI), such as assisted exoskeletons and assisted prostheses, that improve human motion behaviours are playing an increasingly important role in various fields. In order for these HMI devices to provide accurate and appropriate assistance to wearers, the real-time recognition of locomotion with accuracy is among the key issues to be solved. This paper proposes a high real-time motion pattern recognition algorithm using inertial measurement units (IMU) that can accurately and quickly identify the current motion state by collecting various motion parameters of the lower limb during human walking. The algorithm uses a trajectory solving and motion direction discrimination method based on the shank zero velocity point and a terrain classification method based on an F-score improved support vector machine (F-score-SVM). In this paper, experimental data was used to verify the performance of the algorithm. Results show that the algorithm performs better than traditional recognition algorithms in complex environments. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Support vector machines

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control System for Electric Drives of Plate Straightening Machines

Control System for Electric Drives of Plate Straightening Ma...

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International Russian automation Conference (RusAutoCon)

作者： Andrey A. Radionov Andrey Yu. Semitko Boris M. Loginov Vadim R. Khramshin Aleksandra A. Filimonova Department of Automation and Control Moscow Polytechnic University Moscow Russia Department of Mechatronics and Automation South Ural State University Chelyabinsk Russia Magnitogorsk Iron and Steel Works Magnitogorsk Russia Power Engineering and Automated Systems Institute Nosov Magnitogorsk State Technical University Magnitogorsk Russia Department of Electric Drive Mechatronics and Electromechanics South Ural State University Chelyabinsk Russia

The essential quality parameter of rolled products is the flatness along the rolled stock length. The profile defects of the rolled stock, produced at the modern plate mill 5000, frequently occur in the course of intense cooling implied by the thermomechanical rolling technology. To eliminate them, the mill lines include cold straightening machines. The authors show typical flatness defects caused by the occurrence of longitudinal, central and edge waves. Further, the paper characterizes a cold straightening machine installed at the mill 5000 and provides the parameters of electric engines of straightening rollers. The key drawback of the design algorithm for electric drives’ control is setting engine constant moments regardless of the thickness and character of the defects in the rolled stock processed. This causes overloading of the electric and mechanical systems of certain rollers and unsatisfactory product quality. To eliminate the drawback, the authors developed a method for individual setting of engine moments closely coupled in the course of sheet processing. The authors present a functional block diagram for the control system to implement the method. The rationale is provided for the digital setting of moment controllers switched on the inputs of speed controllers. The authors conducted simulation modelling and comparative analysis of engine speeds and moments at the design and proposed settings. The paper provides the analysis of oscillograms obtained before and after the introduction of the control system developed. Its technical and economic feasibility was confirmed during operation.

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Development of a Fault Adaptation System for Underwater Robot Manipulators

Development of a Fault Adaptation System for Underwater Robo...

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Ocean Studies (ICOS), International Conference on

作者： Vladimir Filaretov Alexander Zuev Alexey Zhirabok Alexander Protsenko Institute of Automation and Control Processes Vladivostok Russia Department of Informatics and Control in Technical Systems Sevastopol State University Sevastopol Russia Institute of Marine Technology Problems Vladivostok Russia Department of Automatics and Robotics Far Eastern Federal University Vladivostok Russia

ISBN: (纸本)9781665473736

The paper describes the development and research of a system of adaptation to faults of manipulators of underwater robots. The following types of faults were considered: unknown additional load torques on the output shafts of the manipulator electric drives, changes in the electrical resistance of the armature windings of electric motors, and measurement errors of sensors of the position of the manipulator links. The proposed system makes it possible to identify these faults and compensate for their negative consequences in two stages. At the first stage, the values of faults are estimated using a bank of diagnostic observers operating in a sliding mode. At the second stage, with the help of the obtained estimates, a control signal is generated that ensures the stabilization of dynamic properties of each electric drive at the desired level. To check the operability of the proposed system, a computer simulation was carried out.

关键词： Fault diagnosis Shafts Resistance Autonomous underwater vehicles Measurement errors Computer simulation Oceans

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Robustness and muliple dominant pole method 21

Robustness and muliple dominant pole method

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21st IEEE International Carpathian control Conference, ICCC 2020

作者： Viteckova, Miluse Vitecek, Antonin Janacova, Dagmar VSB-Technical University of Ostrava Department of Control Systems and Instrumentation Ostrava Czech Republic Tomas Bata University in Zlin Department of Automation and Control Engineering Zlin Czech Republic

The paper is devoted to the determination of robust stability regions for PI and PID controllers for first order plants with time delay and integrating plants with time delay. The multiple dominant pole method is cons... 详细信息

ISBN: (纸本)9781728119519

关键词： Time delay

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Development of Digital Pressure Observer in Hydraulic Cylinders for Vertical Balancing of Rolling Stand Spindles

Development of Digital Pressure Observer in Hydraulic Cylind...

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IEEE Russian Workshop on Power Engineering and automation of Metallurgy Industry: Research & Practice (PEAMI)

作者： B. M. Loginov O. A. Gasiyarova V. R. Khramshin S. S. Voronin PJSC Magnitogorsk Iron and Steel Works Magnitogorsk Russia Department of Material Science LLC NPP Uchtekh-Profi Chelyabinsk Russia Power Engineering and Automated Systems Institute Nosov Magnitogorsk State Technical University Magnitogorsk Russia Department of Automation and Control Moscow Polytechnic University Moscow Russia

A literature review showed that the causes of accidents frequently occuring at rolling mills are fatigue failures of spindle heads or necks of mill rollers. This confirms the relevance of developing the systems for monitoring the wear degree of the spindle joint components directly during the rolling process. This is relevant for thick plate rolling mills operating under shock load application. As a diagnostic feature, it is proposed to use pressure in hydraulic cylinders of spindle vertical balancing. It has been experimentally proved that the process of fatigue failure development increases such pressure; that is why it is an informative criterion in terms of defect growth. The observer structure is proposed; at the observer output the variable pressure component is restored, and an emergency signal is generated. The algorithm for virtual observer configuration is implemented in the Matlab Simulink package. The proposed algorithm has been implemented in pilot operation on a thick plate mill 5000. The authors give an example of a pre-emergency situation on-line monitoring. The timely emergency warning has been registered and confirmed which proves the technical and economic efficiency of the observer adoption.

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The Weight-Based Sum Codes in the Residue Ring by Arbitrary Modulus for Synthesis of Self-Checking Digital Computing systems

The Weight-Based Sum Codes in the Residue Ring by Arbitrary ...

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2021 IEEE East-West Design and Test Symposium, EWDTS 2021

作者： Efanov, Dmitrii V. Pashukov, Artem V. Peter the Great St. Petersburg Polytechnic University Deputy General Director for Research of Scientific and Technical Center 'Integrated Monitoring Systems' LLC St. Petersburg Russia Department of Automation Remote Control and Communication on Railway Transport Moscow Russia

ISBN: (纸本)9781665445030

The authors of the paper consider the features of the weight-based sum code in the residue ring by arbitrary modulus. For the first time, the error detection characteristics by this codes class and some patterns of using specific modules and weight coefficient values have been established. It is shown that the number of different weight-based codes is limited, but there are a large number of ways to construct them for each value of the bits number in data vectors. An algorithm for obtaining the bits of the check vectors of the considered codes is presented. Examples of their construction are given, and calculating the number of undetectable errors in data vectors is described. The code properties under study are determined, the account of which is useful in solving problems of technical diagnostics. An example of such a task is the synthesis of self-checking digital devices and devices with controllable architecture. The analysis results of the considered code detecting abilities for the built-in control circuits of combinational benchmarks are presented. The results obtained in this work are universal and are not focused on using only one element base of the implemented devices. © 2021 IEEE.

关键词： Error detection

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Research on Path Planning Algorithm Based on D* Search

Research on Path Planning Algorithm Based on D* Search

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Ocean Studies (ICOS), International Conference on

作者： Jiajun Leng Li Fu Lingling Wang Ning Tang Laboratory of Science and Technology on Marine Navigation and Control China State Shipbuilding Corporation Beijing 100036 China Tianjin Navigation Instruments Research Institute Tianjin China School of Automation Science and Electrical Engineering Beihang University Beijing China Department of Automatic control systems Bauman Moscow State Technical University Moscow Russia

Path planning algorithms are current research hotspots. Heuristic algorithms that can solve dynamic environment problems are gradually becoming the mainstream research direction. The D* algorithm, as one of the new heuristic algorithms, has the advantages of being more computationally efficient than the A * algorithm and being able to solve dynamic problems, and has played an important role in two-dimensional path planning projects such as the NASA Mars rover. But its theoretical research and practical application in 3D environment are very rare. In this context, this paper carries out an in-depth study of the path planning problem based on the D* algorithm, and completes the theoretical derivation and simulation process in 2D and 3D environments. In this paper, a complex random 2D map is established by random generation, and the simulation of D* algorithm is realized on the map with the help of Python language, which realizes the finding of the relative optimal path. Then, in order to study the feasibility of D* solving in 3D environment, the simulation of D* algorithm under 3D map is realized with the help of Python and Unity3d. The research results show that the simulation results are good, which is valuable for the theoretical research and practical application of heuristic algorithms, and plays a role in the application of robot path planning algorithms.

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