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2nd Asia International Conference on Modelling and Simulation, AMS 2008

作者： Hussain, Z. Tokhi, M.O. Gharooni, S. Department of Automatic Control and System Engineering University of Sheffield United Kingdom

ISBN: (纸本)9780769531366

This paper presents the development of an FES-assisted indoor rowing exercise model designed for persons with spinal cord injury (SCI). A modified indoor rowing machine and humanoid are modelled using the Visual Nastran dynamic simulation software. The humanoid model is designed based on anthropometric data. The knee and elbow trajectories are obtained for both normal rowing sequence and rowing sequence with voluntary upper body effort. The model developed is evaluated via the torque required at the knee joint and elbow joint throughout the rowing cycle. The model required an adequate amount of torque in order to produce a smooth rowing manoeuvre. The performance of the model developed indicates that the model can be used for future development of FES-assisted indoor rowing exercise. © 2008 IEEE.

关键词： Computer software

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FES-assisted cycling with quadriceps stimulation and energy storage

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11th International Conference on Climbing and Walking Robots and the Support Technologies for Mobile Machines, CLAWAR 2008

作者： Ksm Kader Ibrahim, B.S. Gharooni, S.C. Tokhi, M.O. Massoud, R. Department of Automatic Control and System Engineering University of Sheffield United Kingdom

ISBN: (纸本)9812835768

Using quadriceps only to obtain smooth FES-cycling reduces the number of stimulated electrodes applied to a paraplegic. Therefore, the preparation process for FES-cycling become more comfortable and less time consuming. This paper discusses how elastic cables can be used to assist quadriceps FES-cycling to eliminate the dead points of the pedal cycle. Implementation of an energy storage device (elastic cable) has many desirable influences on FES-cycling, such as decreasing the number of stimulated muscles. This in tum reduces the number of FES surface electrodes, thereby saving excess energy that is released during the cycling. This subsequently reduces stimulation intensity and duration and minimizes muscle fatigue. Copyright © 2008 by World Scientific Publishing Co. Pte. Ltd.

关键词： Energy storage

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Monte-Carlo-based simulation and investigation of 230 kV transmission lines outage due to lightning

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High Voltage 2020年第1期5卷 83-91页

作者： Ehsan Karami Ahmad Khalilinia Afshar Bali Kumars Rouzbehi Electrical Engineering Department Sharif University of TechnologyTehranIran West Regional Electric Company KermanshahIran Department of System Engineering and Automatic Control University of Seville41004 SevilleSpain

Here,using the probabilistic evaluation based on the Monte Carlo method,back-flashover rate and shielding failure flashover rate of 230 kV overhead transmission lines in the western regions of Iran are *** such an aim,first,the number of thunderstorm days per year is collected from the reported weather information in order to determine the ground flash ***,using MRU-200 equipment,the tower-footing resistance of several towers is ***®software is used in order to produce lightning surges considering its probabilistic nature and randomly distribution on the ground to evaluate striking distance based on the geometric ***,calculated parameters are transferred to EMTP-RV software by establishing a link to perform the transient simulation and report the results for modelled 230 kV transmission ***,considering IEEE-1243 standard,it is shown that due to high ground flash density,using 230 kV tower with one shield wire is not sufficient to protect the line against lightning phenomena.

关键词： flash lightning probabilistic

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State Feedback Tracking control for Indirect Field-oriented Induction Motor Using Fuzzy Approach

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International Journal of Automation and computing 2013年第2期10卷 99-110页

作者： M. Allouche M. Chaabane M. Souissi D. Mehdi F. Tadeo Laboratory of Sciences and Techniques of Automatic Control and Computer Engineering (Lab-STA) National School of Engineering of SfaxUniversity of Sfax Laboratory of Computer and Automatic for System (LIAS) Higher School of Engineering of Poitiers (ESIP) University of Poitiers Department of Systems Engineering University of Valladolid

This paper deals with the synthesis of fuzzy controller applied to the induction motor with a guaranteed model reference tracking performance. First, the Takagi-Sugeno （T-S） fuzzy model is used to approximate the nonlinear system in the synchronous d-q frame rotating with field-oriented control strategy. Then, a fuzzy state feedback controller is designed to reduce the tracking error by minimizing the disturbance level. The proposed controller is based on a T-S reference model in which the desired trajectory has been specified. The inaccessible rotor flux is estimated by a T-S fuzzy observer. The developed approach for the controller design is based on the synthesis of an augmented fuzzy model which regroups the model of induction machine, fuzzy observer, and reference model. The gains of the observer and controller are obtained by solving a set of linear matrix inequalities （LMIs）. Finally, simulation and experimental results are given to show the performance of the observer-based tracking controller.

关键词： Fuzzy tracking control H∞ performance feedback controller linear matrix inequality （LMI） fuzzy observer

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Optimization of Nostoc sp. biomass and protein composition in high-density cultivator based on DoE

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Algal Research 2025年 89卷

作者： Lucato, Veronica Ihadjadene, Yob Sut, Stefania Sforza, Eleonora Krujatz, Felix Department of Industrial Engineering DII University of Padova Via Marzolo 9 Padova 35131 Italy Institute of Natural Materials Technology Technische Universität Dresden Dresden 01069 Germany Chair of Automatic Control & System Dynamics Chemnitz University of Technology Chemnitz 09126 Germany Department of Pharmaceutical and Pharmacological Sciences University of Padova Via Marzolo 5 Padova 35131 Italy biotopa gGmbH – Center for Applied Aquaculture & Bioeconomy Radeberg 01454 Germany

High-density (HD) cultivation systems are a valuable alternative to improve the productivity of phototrophic microorganisms. They are designed to address the major challenges such as low cell densities, light attenuation, and inefficient gas exchange, offering innovative solutions. This work investigates the HD cultivation of the nitrogen-fixing cyanobacterium Nostoc sp. PCC 7120 under diazotrophic conditions, employing a hydrophobic membrane system for efficient CO₂ and N₂ transfer. A design of experiment (DoE) approach is applied to evaluate the influence of key operating variables, including light intensity, photoperiod, and phosphorus concentration, on biomass productivity (P_X) and nitrogen fixation (P_N). Mathematical models, describing the interactions between these process variables and growth responses are developed and validated, enabling the optimization of cultivation conditions to maximise productivity. Remarkable biomass productivity of 1.53 g_X L⁻¹ d⁻¹ was obtained in this system, under diazotrophic conditions. P_X was largely affected by light intensity, which should be supplied continuously, aligning with the ability of heterocystous species like Nostoc sp. of simultaneously perform photosynthesis and N-fixation. Additionally, phosphorus concentration was a critical parameter that must be precisely controlled to prevent substrate limitation or inhibition, with an optimal value of 34.1 mg_P L⁻¹. The produced biomass was further characterised with a focus on its nitrogen-rich molecules, particularly proteins, and nutritional value, assessed through essential amino acid content. The results showed that protein content was improved (53.4 %) at 280 μmol m⁻² s⁻¹, 25.5 mg_P L⁻¹_, and 18 h light period, with essential amino acid ranging between 11 % and 15 %. © 2025 The Authors

关键词： Amino acid profile Biomass productivity Nitrogen-fixing cyanobacteria Protein production Response surface methodology

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Pid control with genetic tuning of a single-link flexible manipulator

Pid control with genetic tuning of a single-link flexible ma...

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16th International Congress on Sound and Vibration 2009, ICSV 2009

作者： Md Zain, B.A. Tokhi, M.O. Md Salleh, S. Department of Automatic Control and System Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781615677368

This paper presents the development of PID-based control schemes with genetic tuning for a single-link flexible manipulator. A PID controller utilizing hub-angle and hub-velocity feedback is developed for control of rigid-body motion of the system. This is then extended to incorporate non-collocated PID control with acceleration feedback for control of vibration (flexible motion) of the system. Moreover, an iterative learning control scheme is realised with PID control for the system. The control schemes thus developed are tested within a flexible manipulator system, and the system performance with the controllers is presented and analyzed in the time and frequency domains.

关键词： Three term control systems

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Greenhouse monitoring system based on PLC and wireless sensors 24

Greenhouse monitoring system based on PLC and wireless senso...

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24th International Conference on control systems and Computer Science, CSCS 2023

作者： Dumitrascu, Alexandru University Politehnica of Bucharest Department of Automatic Control and System Engineering Bucharest Romania

ISBN: (纸本)9798350313390

The modern monitoring and control systems that are currently used in most fields are based on intelligent algorithms, distributed management systems, and a new generation of communication buses. For the monitoring and control of the processes inside a greenhouse, the use of sophisticated algorithms or complex devices is not required. However, in order to make the activity more efficient and increase the production of a greenhouse, a proposed solution is to use data management and control devices such as PLCs, and the data acquired from the greenhouse to be retrieved by means of sensors connected to nodes with wireless transmission. The wireless communication variant proved to be the most efficient, in the greenhouse environment being an increased humidity due to the irrigation process of the plants. Also, the need for space for the plants requires giving up the wires drawn through the greenhouse. © 2023 IEEE.

关键词： Greenhouses

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Modeling Method of Coaxial Cable Transmission Characteristics Based on Fourier Decomposition 2

Modeling Method of Coaxial Cable Transmission Characteristic...

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2nd IEEE International Conference on Electrical, Automation and Computer engineering, ICEACE 2024

作者： Li, Hao Zhan, Ziyuan Zhang, Zhizhuo Yang, Zhiming Bao, Liang Sun, Mouxun Beijing Aerospace Automatic Control Institute Beijing Department of System Engineering China

ISBN: (纸本)9798350368208

At present, in the fields of mobile communication, aerospace and et al., the signal transmission quality problems caused by the structural damage of the coaxial cable have become increasingly prominent, and the fault diagnosis methods for the coaxial cable have also received extensive attention in the industrial field. However, most of the commonly used method, such as the numerical modeling-based methods only consider the effect of signal reflection and transmission delays, but the effect of signal attenuation is not discussed, which in turn undermine the effect of cable diagnosis method. In this regard, this paper proposes a method for analyzing the attenuation characteristics of coaxial cables based on Fourier decomposition. First, the attenuation characteristics of the coaxial cable on fixed frequency is measured by the vector network analysis. Then, the transmission attenuation for continuous frequency is modeled using the Support Vector Regression. Next, the arbitrary input signal is decomposed by Fourier Transform and the attenuation of the coaxial cable when any signal is input is finally established. This paper also carried out the pulse attenuation measurement experiment based on the hardware platform, and compared the measured results with the simulation results, which verified the effectiveness of the proposed method. © 2024 IEEE.

关键词： Coaxial cables

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Security issues in MCPS when using Wireless Sensor Networks 10

Security issues in MCPS when using Wireless Sensor Networks

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10th E-Health and Bioengineering Conference, EHB 2022

作者： Béatrix-May, Balaban Ştefan, Sacală Ioan Alina-Claudia, Petrescu-Niţă Radu, Simen Department of System Engineering Faculty of Automatic Control and Computers UPB Bucharest Romania

ISBN: (纸本)9781665485579

Considering the evolution of technology, the need to secure data is growing fast. When we turn our attention to the healthcare field, securing data and assuring privacy are critical conditions that must be accomplished. The information is sensitive and confidential, and the exchange rate is very fast. Over the years, the healthcare domain has gradually seen a growth of interest regarding the interconnectivity of different processes to optimize and improve the services that are provided. Therefore, we need intelligent complex systems that can collect and transport sensitive data in a secure way. These systems are called cyber-physical systems. In healthcare domain, these complex systems are named medical cyber physical systems. The paper presents a brief description of the above-mentioned intelligent systems. Then, we focus on wireless sensor networks and the issues and challenges that occur in securing sensitive data and what improvements we propose on this subject. In this paper we tried to provide a detailed overview about cyber-physical systems, medical cyber-physical systems, wireless sensor networks and the security issues that can appear. © 2022 IEEE.

关键词： Wireless sensor networks

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Research on the Method of Remaining Useful Life Prediction of Lithium-Ion Battery Based on LSTM 2

Research on the Method of Remaining Useful Life Prediction o...

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2nd IEEE International Conference on Electrical, Automation and Computer engineering, ICEACE 2024

作者： Wang, Shenhang Wang, Junjie Xiang, Gang Lin, Ruishi Peng, Yu Yang, Zhiming Beijing Aerospace Automatic Control Institute Department of System Engineering Beijing China

ISBN: (纸本)9798350368208

Lithium-ion batteries are prone to capacity degradation during use, leading to a decline in their reliability and potentially causing catastrophic failures. This necessitates the study of advanced methods for estimating the lifespan of lithium-ion batteries. To address this need, this paper conducts research in three areas: the extraction of degradation features, the construction of health factors, and the development of predictive models, proposing a comprehensive framework for estimating the remaining useful life of lithium-ion batteries. Firstly, the general trends of external feature parameters as a function of cycling are observed to identify the features that indicate battery degradation. Next, the relationship between these features and battery capacity is determined using Grey Relation Analysis, allowing for the construction of an indirect health factor. Finally, a data-driven prediction method is employed to construct a predictive network model using Long Short-Term Memory networks, with the health factor used for training to accurately predict the health state of the lithium-ion battery. The effectiveness of the proposed remaining life prediction method is validated using the NASA Battery Set dataset from NASA Ames Research Center. © 2024 IEEE.

关键词： NASA

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