IFAC-PapersOnLine最新文献_第7页

Optimal design of sequential excitation for identification of multi-variable systems 识别多变量系统的顺序激励优化设计

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.371

Michael Lundh , Sudhakar Munusamy , Alf J. Isaksson , Håkan Hjalmarsson , Vivek S. Pinnamaraju

{"title":"Optimal design of sequential excitation for identification of multi-variable systems","authors":"Michael Lundh , Sudhakar Munusamy , Alf J. Isaksson , Håkan Hjalmarsson , Vivek S. Pinnamaraju","doi":"10.1016/j.ifacol.2024.08.371","DOIUrl":"10.1016/j.ifacol.2024.08.371","url":null,"abstract":"<div><p>While designing excitation signals for identification of industrial processes, it is important to obtain desired model accuracies, reduce the experimental time and limit the output amplitudes within the specified bounds to avoid serious disruptions of the nominal process operation. In this work, we design a multi-frequency multi-amplitude square wave (multi-square) input based on a nominal model by minimizing the experiment length and placing constraints on the model accuracy (in the frequency domain) and the output amplitudes. A separate design is carried out for each input where the resulting optimization problem has the same structure as a semi-definite program but with the decision variables restricted to integers corresponding to the number of half-periods of each square-wave. For processes with multiple inputs, the corresponding designs are carried out sequentially. The violations in the output constraints either due to model-plant mismatch or unmeasured disturbances should be mitigated by appropriate closed loop control actions. The efficacy of the proposed design is shown by means of a simulation case study.</p></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"58 14","pages":"Pages 409-415"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405896324011297/pdf?md5=5e5033fee9f21a351535ea9a59d6c51a&pid=1-s2.0-S2405896324011297-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reservoir computing-based slow feature analysis: Application in fault classification 基于储层计算的慢特征分析：在断层分类中的应用

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.378

Alireza Memarian , Amirreza Memarian , Seshu Kumar Damarla , Rahul Raveendran , Biao Huang

引用次数: 0

Towards Constraint-Based Burden-Aware Models for Metabolic Engineering 为代谢工程建立基于约束的负担感知模型

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.344

M. Maton , F.N. Santos-Navarro , J. Picó , Ph. Bogaerts , A. Vande Wouwer

{"title":"Towards Constraint-Based Burden-Aware Models for Metabolic Engineering","authors":"M. Maton , F.N. Santos-Navarro , J. Picó , Ph. Bogaerts , A. Vande Wouwer","doi":"10.1016/j.ifacol.2024.08.344","DOIUrl":"10.1016/j.ifacol.2024.08.344","url":null,"abstract":"<div><p>Over the years, hundreds of applications have proved the effectiveness of constraint-based methods to validate the definition of metabolic networks, determine the robustness of metabolic models, and analyze the flow of metabolites through a network. However, stoichiometric models do not include information on flux capacity via enzymatic activity. Methods combining biological data from genome to metabolome have been developed to obtain improved flux predictions and constrain the range of possible flux distributions. Yet, these models still lack relevant information to design de novo metabolic pathways. Expressing the exogenous enzymes induces a cell burden due to competition for cell resources between the exogenous genes and the endogenous host ones, compromising the performance of the designed pathway. Thus, optimal selection of the expression strength of the pathway enzymes is still a challenge. Host-aware models have been developed to tackle cell burden in the context of designing increasingly complex synthetic genetic circuits in synthetic biology. This paper suggests a method to integrate host-aware gene expression models with constraint-based modeling to maximize the flux through an exogenous pathway by optimizing promoter and ribosome binding site strengths, crucial parameters that define the required transcription and translation strengths of the pathway enzymes’ genes. This study considers the formation of p-coumaric acid, shows promising results, and paves the way for further investigations.</p></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"58 14","pages":"Pages 247-252"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405896324010954/pdf?md5=0aefe9e744f227a614cc78d6ecc705bb&pid=1-s2.0-S2405896324010954-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Hierarchical MPC Framework to Mitigate Faults and Risks in Microgrids⁎ 缓解微电网故障和风险的分层 MPC 框架⁎

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.355

Ascension Zafra-Cabeza , Pablo Velarde , Carlos Bordons , Miguel A. Ridao

{"title":"A Hierarchical MPC Framework to Mitigate Faults and Risks in Microgrids⁎","authors":"Ascension Zafra-Cabeza , Pablo Velarde , Carlos Bordons , Miguel A. Ridao","doi":"10.1016/j.ifacol.2024.08.355","DOIUrl":"10.1016/j.ifacol.2024.08.355","url":null,"abstract":"<div><p>This paper presents a hierarchical MPC-based control framework for a real microgrid including solar panels and batteries, that considers the uncertainty from the point of view of faults and risks (F&R) mitigation. While fault management is applied during plant operation, risk management considers external factors that can change microgrid planning in the medium-long term. Due to their different time-scales, a two-layer control scheme is proposed using Model Predictive Control (MPC) at both levels. At the bottom layer, the fault-tolerant predictive controller optimizes the operation by manipulating inputs to follow microgrid set-points. A reconfiguration strategy is implemented using structured residuals and stochastic thresholds. On the other hand, the upper layer develops an optimal mitigation strategy, also based on MPC, to reduce the effects of risks obtained from external information, i.e., unexpected changes in demands, maintenance costs, or deviations in generation. The decision variables of this layer are the selection of mitigation actions to be undertaken, which minimise a proposed multicriteria objective function. different simulations have been carried out to show the efficacy of this methodology in a F&R scenario from a stochastic point of view.</p></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"58 14","pages":"Pages 313-318"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S240589632401108X/pdf?md5=df87afe88b9e1c863da690fb78c6e2d2&pid=1-s2.0-S240589632401108X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast Quantum Gate Control with Trajectory Optimization 利用轨迹优化实现快速量子门控制

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.358

Shouliang Hu , Ming Li , Chunlin Chen , Daoyi Dong

引用次数: 0

A 2DoF Twin Rotor MIMO System for Teaching and Research 用于教学和研究的 2DoF 双旋翼多输入多输出系统

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.453

Kelechi U. Ebirim , Nadjim M. Horri , Emmanuel Prempain

引用次数: 0

Sensor Cube – A Tool for Hands-on Learning of Sensor Data Processing 传感器立方体--传感器数据处理实践学习工具

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.456

Michael Bleier

引用次数: 0

Representing the dynamics of student learning and interactions with a university curriculum 体现学生学习的动态以及与大学课程的互动

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.488

Paolo Castaldi , Nicola Mimmo

引用次数: 0

Parametric estimation of arbitrary fractional order models for battery impedances⁎ 电池阻抗任意分数阶模型的参数估计⁎

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.511

Freja Vandeputte , Noël Hallemans , John Lataire

{"title":"Parametric estimation of arbitrary fractional order models for battery impedances⁎","authors":"Freja Vandeputte , Noël Hallemans , John Lataire","doi":"10.1016/j.ifacol.2024.08.511","DOIUrl":"10.1016/j.ifacol.2024.08.511","url":null,"abstract":"<div><div>Electrochemical impedance spectroscopy (EIS) is a widely-used non-invasive technique for estimating the impedance of a battery from current and voltage measurements. While EIS is commonly used as a nonparametric, purely data-driven estimation method, this article proposes a parametric, physics-informed alternative. As an underlying parametric model, we use an equivalent circuit model for the battery impedance with a Warburg element to model the low-frequency diffusion. This fractional order impedance model is linear in all the parameters except one, namely the fractional order itself. Hence, we present a separable total least squares estimator, which first eliminates the linear parameters using their total least squares solution, and then minimises the resulting nonlinear least squares problem over the fractional order. Measuring multiple periods of the signals allows to weigh the problem with the noise variances, thus making the estimation consistent. The parametric estimation method is validated on simulations and applied to measurement data of commercial Samsung 48X cells.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"58 15","pages":"Pages 97-102"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405896324012916/pdf?md5=21e262f35d2d2d921dc6cfe9500864d0&pid=1-s2.0-S2405896324012916-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Li-ion cell impedance identification in the time domain as an alternative to identification in the frequency domain 时域锂离子电池阻抗识别替代频域识别

IFAC-PapersOnLine Pub Date : 2024-01-01 DOI: 10.1016/j.ifacol.2024.08.520

Omar Arahbi , Benoît Huard , Jean-Denis Gabano , Thierry Poinot

{"title":"Li-ion cell impedance identification in the time domain as an alternative to identification in the frequency domain","authors":"Omar Arahbi , Benoît Huard , Jean-Denis Gabano , Thierry Poinot","doi":"10.1016/j.ifacol.2024.08.520","DOIUrl":"10.1016/j.ifacol.2024.08.520","url":null,"abstract":"<div><div>Electrochemical Impedance Spectroscopy (EIS) is a widely used tool for selecting a pertinent Equivalent Circuit Model (ECM) of Li-ion cells which is characterized by non integer order operators. The main drawback of EIS is the long time required to scan a whole spectrum down to low frequencies. Thus, chronopotentiometry (CP) is an alternative method which consists in identifying impedance parameters using an excitation current sequence lasting a few seconds and the corresponding induced voltage variations. An impedance fractional model needs to be synthesized in order to allow simulation also in the time domain. The pertinence of CP is demonstrated using experimental results obtained with a Samsung 3.4 Ah Li-ion cell. Due to its inability to take into account the inductive behavior, fractional model used in the time domain exhibit limitations. Nevertherless, parameters identified in the time domain present similar results to the ones identified in the frequency domain under the condition of a restricted frequency range.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"58 15","pages":"Pages 151-156"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405896324013004/pdf?md5=dbb46b39361970367708d2419bfd9142&pid=1-s2.0-S2405896324013004-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0