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fpga implementation of Extended Kalman Filter for Parameters Estimation of Railway Wheelset

Computers, Materials & Continua 2023年第2期74卷 3351-3370页

作者： Khakoo Mal Tayab Din Memon Imtiaz Hussain Kalwar Bhawani Shankar Chowdhry Department of Electronic Engineering Mehran University of Engineering&TechnologyJamshoro76062Pakistan Sukkur IBA University Sukkur65200Pakistan Design and Creative Technology Torrens University Australia196 Flinders StreetMelbourne3000VICAustralia Department of Electronics and Power Engineering Pakistan Navy Engineering College NUSTKarachi75350Pakistan NCRA-Condition Monitoring Systems Lab Mehran University of Engineering&TechnologyJamshoro76062Pakistan

It is necessary to know the status of adhesion conditions between wheel and rail for efficient accelerating and decelerating of railroad vehicle.The proper estimation of adhesion conditions and their real-time implementation is considered a challenge for scholars.In this paper,the development of simulation model of extended Kalman filter(EKF)in MATLAB/Simulink is presented to estimate various railway wheelset parameters in different contact conditions of track.Due to concurrent in nature,the Xilinx®System-on-Chip Zynq Field Programmable Gate Array(fpga)device is chosen to check the onboard estimation ofwheel-rail interaction parameters by using the National Instruments(NI)myRIO®development board.The NImyRIO®development board is flexible to deal with nonlinearities,uncertain changes,and fastchanging dynamics in real-time occurring in wheel-rail contact conditions during vehicle operation.The simulated dataset of the railway nonlinear wheelsetmodel is tested on fpga-based EKF with different track conditions and with accelerating and decelerating operations of the vehicle.The proposed model-based estimation of railway wheelset parameters is synthesized on fpga and its simulation is carried out for functional verification on fpga.The obtained simulation results are aligned with the simulation results obtained through MATLAB.To the best of our knowledge,this is the first time study that presents the implementation of a model-based estimation of railway wheelset parameters on fpga and its functional verification.The functional behavior of the fpga-based estimator shows that these results are the addition of current knowledge in the field of the railway.

关键词： Adhesion force extended kalman filter fpga implementation railway wheelset real-time estimation wheel-rail interaction

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Design and fpga implementation of a new hyperchaotic system

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Chinese Physics B 2008年第10期17卷 3596-3602页

作者：王光义包旭雷王忠林 School of Electronics Information Hangzhou Dianzi University Department of Physics and Electronics Science Binzhou University

In this paper, a new four-dimensional autonomous hyperchaotic system is designed for generating complex chaotic signals. In the design, its parameters are selected according to the requirements for chaos and hyperchaos. The hyperchaotic nature is verified theoretically by using the bifurcation analysis and demonstrated experimentally by the implementation of an analogue electronic circuit. Moreover, the Field Programmable Gate Array （fpga） technology is applied to implementing a continuous system in a digital form by using a chip of Altera Cyclone II EP2C35F484C8. The digital sequence generated from the fpga device is observed in our experimental setup.

关键词： Hyperchaos bifurcation fpga implementation

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Dynamic analysis,fpga implementation,and cryptographic application of an autonomous 5D chaotic system with offset boosting

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Frontiers of Information Technology & Electronic Engineering 2020年第6期21卷 950-961页

作者： Sifeu TAKOUGANG KINGNI Karthikeyan RAJAGOPAL Serdar CICEK Ashokkumar SRINIVASAN Anitha KARTHIKEYAN Department of Mechanical Petroleum and Gas EngineeringFaculty of Mines and Petroleum IndustriesThe University of MarouaMaroua P.O.Box 46Cameroon Faculty of Electrical and Electronics Engineering Ton Due Thang UniversityHo Chi Minh City 758307Vietnam Department of Electronic and Automation Vocational School of HacibektasNevsehir Hacibektar Veli UniversityHacibektas 50800Turkey Center for Nonlinear Dynamics Defence UniversityBishoftu 6020Ethiopia

An autonomous five-dimensional(5D)system with offset boosting is constructed by modifying the well-known three-dimensional autonomous Liu and Chen system.Equilibrium points of the proposed autonomous 5D system are found and its stability is analyzed.The proposed system includes Hopf bifurcation,periodic attractors,quasi-periodic attractors,a one-scroll chaotic attractor,a double-scroll chaotic attractor,coexisting attractors,the bistability phenomenon,offset boosting with partial amplitude control,reverse period-doubling,and an intermittency route to chaos.Using a field programmable gate array(fpga),the proposed autonomous 5D system is implemented and the phase portraits are presented to check the numerical simulation results.The chaotic attractors and coexistence of the attractors generated by the fpga implementation of the proposed system have good qualitative agreement with those found during the numerical simulation.Finally,a sound data encryption and communication system based on the proposed autonomous 5D chaotic system is designed and illustrated through a numerical example.

关键词： Chaotic system Hopf bifurcation Coexistence of attractors Offset boosting fpga implementation Sound encryption

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Study on a new chaotic bitwise dynamical system and its fpga implementation

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Chinese Physics B 2015年第6期24卷 184-191页

作者：王倩雪禹思敏 C.Guyeux J.Bahi 方晓乐 College of Automation Guangdong University of Technology Femto-st Institute University of Franche-Comte Land and Resources Technology Center of Guangdong Province

In this paper, the structure of a new chaotic bitwise dynamical system （CBDS） is described. Compared to our previous research work, it uses various random bitwise operations instead of only one. The chaotic behavior of CBDS is mathemat- ically proven according to the Devaney＇s definition, and its statistical properties are verified both for uniformity and by a comprehensive, reputed and stringent battery of tests called TestU01. Furthermore, a systematic methodology developing the parallel computations is proposed for fpga platform-based realization of this CBDS. Experiments finally validate the proposed systematic methodology.

关键词： chaos chaotic bitwise dynamical systems fpga implementation

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Heterogeneous dual memristive circuit:Multistability,symmetry,and fpga implementation

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Chinese Physics B 2021年第12期30卷 237-247页

作者：承亦梓闵富红芮智张雷 School of Electrical and Automation Engineering Nanjing Normal UniversityNanjing 210023China

An improved heterogeneous dual memristive circuit(DMC)is proposed based on Chua's circuit,which shows good symmetry and multistablility.For the difficulty in controlling the initial conditions,which restricts the engineering applications,the 3 rd-order model(3 OM)in flux-charge domain is derived from the 5 th-order model(5 OM)in volt-ampere domain by using the flux-charge analysis method(FCAM).The consistence of symmetry and multistability before and after dimensionality decreasing is meticulously investigated via bifurcation diagram,Lyapunov exponents,and especially attraction basins.The comparative analysis validates the effectiveness of reduction model and improves the controllability of the circuit.To avoid the noise in the analog circuit,a field-programmable gate array(fpga)is utilized to realize the reduction model,which is rarely reported and valuable for relevant research and application.

关键词： memristive circuit chaos multistability fpga implementation

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Efficient fpga implementation of AES 128 bit for IEEE 802.16e mobile WiMax standards

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Circuits and Systems 2016年第4期7卷 371-380页

作者： P. Rajasekar Dr. H. Mangalam Department of Electronics and Communication Engineering Kathir College of Engineering Coimbatore India Department of Electronics and Communication Engineering Sri Krishna College of Engineering and Technology Coimbatore India

In an advancement of communication field, wireless technology plays a predominant role in data transmission. In the timeline of wireless domain, Wi-Fi, Bluetooth, zigbee etc are some of the standards, which are being used in today’s wireless medium. In addition, the WiMax is introduced by IEEE in IEEE 802.16 for long distance communication, specifically 802.16e standard for mobile WiMax. It is an acronym of Worldwide Interoperability for Microwave Access. It is to be deliver wireless transmission with high quality of service in a secured environment. Since, security becomes dominant design aspect of every communication, a new technique has been proposed in wireless environment. Privacy across the network and access control management is the goal in the predominant aspects in the WiMax protocol. Especially, MAC sub layer should be evaluated in the security architecture. It has been proposed on cryptography algorithm AES that require high cost. Under this scenario, we present the optimized AES 128 bit counter mode security algorithm for MAC layer of 802.16e standards. To design a efficient MAC layer, we adopt the modification of security layers data handling process. As per the efficient design strategy, the power and speed are the dominant factors in mobile device. Since we concentrate mobile WiMax, efficient design is needed for MAC Security layer. Our proposed model incorporates the modification of AES algorithm. The design has been implemented in Xilinx virtex5 device and power has been analyzed using XPower analyzer. This proposed system consumes 41% less power compare to existing system.

关键词： decryption fpga implementation Electronic code book mode Galois Field Low Power Architecture : AES encryption

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Secure and efficient implementation of facial emotion detection for smart patient monitoring system

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Quantitative Biology 2023年第2期11卷 175-182页

作者： Kh Shahriya Zaman Md Mamun Bin Ibne Reaz Department of Electrical Electronic and Systems EngineeringUniversiti Kebangsaan Malaysia(UKM)Bangi 43600Malaysia

Background:Machine learning has enabled the automatic detection of facial expressions,which is particularly beneficial in smart monitoring and understanding the mental state of medical and psychological patients.Most algorithms that attain high emotion classification accuracy require extensive computational resources,which either require bulky and inefficient devices or require the sensor data to be processed on cloud servers.However,there is always the risk of privacy invasion,data misuse,and data manipulation when the raw images are transferred to cloud servers for processing facical emotion recognition(FER)data.One possible solution to this problem is to minimize the movement of such privatedata.Methods:In this research,we propose an efficient implementation of a convolutional neural network(CNN)based algorithm for on-device FER on a low-power field programmable gate array(fpga)platform.This is done by encoding the CNN weights to approximated signed digits,which reduces the number of partial sums to be computed for multiply-accumulate(MAC)operations.This is advantageous for portable devices that lack full-fledged resourceintensivemultipliers.Results:We applied our approximation method on MobileNet-v2 and ResNet18 models,which were pretrained with the FER2013 dataset.Our implementations and simulations reduce the fpga resource requirement by at least 22%compared to models with integer weight,with negligible loss in classification accuracy.Conclusions:The outcome of this research will help in the development of secure and low-power systems for FER and other biomedical applications.The approximation methods used in this research can also be extended to other imagebasedbiomedicalresearchfields.

关键词： facial expression detection emotion recognition fpga implementation convolutional neural network signed digit approximation

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Design and implementation of 802.1x Authentication Module in Security Switch for Industrial Control System Based on fpga

Design and Implementation of 802.1x Authentication Module in...

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2012 National Conference on Information Technology and Computer Science

作者： Yanan Zou Department of Control Science and Engineering Zhejiang University Hangzhou,China Dongqin Feng Department of Control Science and Engineering Zhejiang University Hangzhou,China

Aiming at the safety of the industrial control system,an authentication module based on 802.1x with dual authentication model in safety switch is proposed.The authentication mechanism of 802.1x is stated.The dual authentication model,namely the authentication between the safety switch and the server and the authentication between the client and the server,is raised.The EP4CGX75 chip of Altera company is chosen as the hardware developing platform.The design and realization in fpga has been researched.The simulations indicate the correctness and validity of the model designed.

关键词： Safety of Industrial Control System 802.1x fpga implementation

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Memristor hyperchaos in a generalized Kolmogorov-type system with extreme multistability

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Chinese Physics B 2023年第1期32卷 264-271页

作者：焦晓东袁明峰陶金孙昊孙青林陈增强 College of Artificial Intelligence Nankai UniversityTianjin 300350China Department of Earth and Space Science and Engineering York UniversityToronto M3 J 1P3Canada

Memristor chaotic systems have aroused great attention in recent years with their potentials expected in engineering applications.In this paper,a five-dimension(5D)double-memristor hyperchaotic system(DMHS)is modeled by introducing two active magnetron memristor models into the Kolmogorov-type formula.The boundness condition of the proposed hyperchaotic system is proved.Coexisting bifurcation diagram and numerical verification explain the bistability.The rich dynamics of the system are demonstrated by the dynamic evolution map and the basin.The simulation results reveal the existence of transient hyperchaos and hidden extreme multistability in the presented DMHS.The NIST tests show that the generated signal sequence is highly random,which is feasible for encryption purposes.Furthermore,the system is implemented based on a fpga experimental platform,which benefits the further applications of the proposed hyperchaos.

关键词： extreme multistability memristor-based hyperchaos hidden attractor fpga implementation

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