ISA transactions最新文献

Harnessing unlabeled data: Enhanced rare earth component content prediction based on BiLSTM-Deep autoencoder.

ISA transactions Pub Date : 2025-01-02 DOI: 10.1016/j.isatra.2024.12.027

Wenhao Dai, Rongxiu Lu, Jianyong Zhu, Pengzhan Chen, Hui Yang

{"title":"Harnessing unlabeled data: Enhanced rare earth component content prediction based on BiLSTM-Deep autoencoder.","authors":"Wenhao Dai, Rongxiu Lu, Jianyong Zhu, Pengzhan Chen, Hui Yang","doi":"10.1016/j.isatra.2024.12.027","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.027","url":null,"abstract":"Traditional data-driven models for predicting rare earth component content are primarily developed by relying on supervised learning methods, which suffer from limitations such as a lack of labeled data, lagging, and poor usage of a major amount of unlabeled data. This paper proposes a novel prediction approach based on the BiLSTM-Deep autoencoder enhanced traditional LSSVM algorithm, termed BiLSTM-DeepAE-LSSVM. This approach thoroughly exploits the implicit information contained in copious amounts of unlabeled data in the rare earth production process, thereby improving the traditional supervised prediction method and increasing the accuracy of component content predictions. Initially, a BiLSTM autoencoder is established for unsupervised training on the rare earth production process data, enabling the extraction of inherent time series characteristics. Subsequently, boolean vectors are introduced in the Deep autoencoder training process to perform masking operations on the input data, simulating scenarios with noise and missing data. This is facilitated by their adherence to Bernoulli distributions, which allow for the random setting of certain input vector dimensions to zero. Additionally, the Deep autoencoder is capable of extracting high-dimensional implicit features from the data. After that, the conventional supervised prediction technique, least squares support vector machine (LSSVM), is fused with the implicit characteristics derived from the well-constructed BiLSTM-Deep autoencoder, culminating in the creation of a prediction model for rare earth component content. Ultimately, the simulation verification using LaCe/PrNd extraction field data demonstrates the effectiveness of the proposed approach in harnessing substantial quantities of unlabeled data from the rare earth extraction production process, thereby bolstering the accuracy of model predictions.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142934309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visualized neural network-based vibration control for pigeon-like flexible flapping wings.

ISA transactions Pub Date : 2025-01-02 DOI: 10.1016/j.isatra.2024.12.038

Hejia Gao, Jinxiang Zhu, Changyin Sun, Zi-Ang Li, Qiuyang Peng

{"title":"Visualized neural network-based vibration control for pigeon-like flexible flapping wings.","authors":"Hejia Gao, Jinxiang Zhu, Changyin Sun, Zi-Ang Li, Qiuyang Peng","doi":"10.1016/j.isatra.2024.12.038","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.038","url":null,"abstract":"This study investigates pigeon-like flexible flapping wings, which are known for their low energy consumption, high flexibility, and lightweight design. However, such flexible flapping wing systems are prone to deformation and vibration during flight, leading to performance degradation. It is thus necessary to design a control method to effectively manage the vibration of flexible wings. This paper proposes an improved rigid finite element method (IRFE) to develop a dynamic visualization model of flexible flapping wings. Subsequently, an adaptive vibration controller was designed based on non-singular terminal sliding mode (NTSM) control and fuzzy neural network (FNN) in order to effectively solve the problems of system uncertainty and actuator failure. With the proposed control, stability of the closed loop system is achieved in the context of Lyapunov's stability theory. At last, a joint simulation using MapleSim and MATLAB/Simulink was conducted to verify the effectiveness and robustness of the proposed controller in terms of trajectory tracking and vibration suppression. The obtained results have demonstrated great practical value of the proposed method in both military (low-altitude reconnaissance, urban operations, and accurate delivery, etc.) and civil (field research, monitoring, and relief for disasters, etc.) applications.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142928938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new sensor-less voltage and frequency control of stand-alone DFIG based dead-beat direct-rotor flux control-experimental validation.

ISA transactions Pub Date : 2024-12-31 DOI: 10.1016/j.isatra.2024.12.039

Mohammed Saci Chabani, M T Benchouia, A Golea, Almoataz Y Abdealziz, Mahmoud A Mossa

{"title":"A new sensor-less voltage and frequency control of stand-alone DFIG based dead-beat direct-rotor flux control-experimental validation.","authors":"Mohammed Saci Chabani, M T Benchouia, A Golea, Almoataz Y Abdealziz, Mahmoud A Mossa","doi":"10.1016/j.isatra.2024.12.039","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.039","url":null,"abstract":"The paper presents a new sensor-less voltage and frequency control method for a stand-alone doubly-fed induction generator (DFIG) feeding an isolated load. The proposed control approach directly regulates the magnitude and angle of the rotor-flux vector rather than controlling rotor currents or voltages as in classic field oriented control (FOC). To accurately regulate the magnitude and frequency of stator voltage, two separate closed-loop based PI regulators are employed to evaluate the reference signals of the rotor flux vector magnitude and angle, respectively. As the proposed control strategy directly regulates the rotor flux vector in the rotor frame, this helps effectively in avoiding the use of rotor speed/position sensors or computationally intensive rotor speed estimators. Furthermore, the stator current measurements are not required to evaluate the load power requirement, considerably reducing the control implementation cost for the system. Furthermore, the proposed control strategy has the ability to operate in both sub-synchronous and super-synchronous speed modes without the need to identify the operating speed range. Since the method only requires knowledge of rotor resistance, it is extremely simple to use and virtually parameter-independent. To evaluate the performance, effectiveness and robustness of the new controller, extensive simulation and experimental tests of a 3-kW laboratory generator are accomplished for different operating conditions. Additionally, a performance comparison with the classic FOC strategy is made, from which the superiority of the proposed control is clearly confirmed.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142928937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Event-based sliding mode control for singularly perturbed systems with switching parameters.

ISA transactions Pub Date : 2024-12-30 DOI: 10.1016/j.isatra.2024.12.036

Changchun Shen, Jun Cheng

{"title":"Event-based sliding mode control for singularly perturbed systems with switching parameters.","authors":"Changchun Shen, Jun Cheng","doi":"10.1016/j.isatra.2024.12.036","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.036","url":null,"abstract":"This paper addresses the event-based sliding mode control problem for singularly perturbed systems with switching parameters. Unlike traditional Markovian switching systems, singularly perturbed S-MSSs allow more flexible state transitions, which can be described by a general distribution rather than the exponential distribution assumed in Markovian switching systems. To enhance the performance of such systems, a novel memory-based dynamic event-triggered protocol (DETP) is proposed, incorporating a memory term for the auxiliary offset variable. This approach reduces the frequency of communication packets, leading to more efficient transmission scheduling. The proposed memory-based DETP distinguishes itself by utilizing both the memory term and the singular perturbation parameter, effectively mitigating communication overhead while maintaining control performance. In addition, an innovative integral-type sliding surface is constructed, and a hidden semi-Markovian switching model is employed to address mode mismatches between the original system and the sliding mode control law. Using parameter-dependent Lyapunov theory, several sufficient conditions are derived to guarantee the exponential mode stability under bounded disturbances (EMSUB) behavior of the sliding mode dynamics. Finally, the effectiveness of the proposed control strategy is demonstrated through two simulation examples.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142923872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frequency-domain-based nonlinear normalized iterative learning control for three-dimensional ball screw drive systems.

ISA transactions Pub Date : 2024-12-28 DOI: 10.1016/j.isatra.2024.12.030

Fu Wen-Yuan

引用次数: 0

Adaptive bipartite time-varying formation tracking control for heterogeneous multi-agent systems with DoS attacks.

ISA transactions Pub Date : 2024-12-26 DOI: 10.1016/j.isatra.2024.12.028

Chengmei Tang, Lianghao Ji, Shasha Yang, Xing Guo

{"title":"Adaptive bipartite time-varying formation tracking control for heterogeneous multi-agent systems with DoS attacks.","authors":"Chengmei Tang, Lianghao Ji, Shasha Yang, Xing Guo","doi":"10.1016/j.isatra.2024.12.028","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.028","url":null,"abstract":"Denial-of-service (DoS) attacks and antagonistic interactions may exist in complex networks, which will destroy cooperative communication between agents and thus cannot realize collaborative tasks. Therefore, this paper studies time-varying formation tracking (TVFT) of heterogeneous multi-agent systems (HMASs) with DoS attacks and cooperative-antagonistic interactions. It aims to ensure system communication connectivity and allow followers to achieve distributed secure bipartite TVFT. To enable followers to successfully obtain unknown state of the leader, this paper designs a composite adaptive dynamic event-triggered (DET) bipartite compensator. Compared with existing compensators, it can resist DoS attacks; obtain information of a non-autonomous leader; increase the event triggering interval; and be independent of global information of signed digraph. Based on proposed compensator, a new distributed formation controller is designed for achieving TVFT. The results show that sufficient conditions for realizing secure bipartite TVFT of HMASs under DoS attacks and feasibility conditions for realizing time-varying formations are obtained. Meanwhile, simulations are performed to test validity of the compensator and controller.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142904653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Game-theoretic planning for multiplayer defense task with online objective function parameter estimation.

ISA transactions Pub Date : 2024-12-21 DOI: 10.1016/j.isatra.2024.11.053

Hongwei Fang, Peng Yi

{"title":"Game-theoretic planning for multiplayer defense task with online objective function parameter estimation.","authors":"Hongwei Fang, Peng Yi","doi":"10.1016/j.isatra.2024.11.053","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.11.053","url":null,"abstract":"This work investigates a game-theoretic path planning algorithm with online objective function parameter estimation for a multiplayer intrusion-defense game, where the defenders aim to prevent intruders from entering the protected area. At first, an intruder is assigned to each defender to perform a one-to-one interception by solving an integer optimization problem. Then, the intrusion-defense game is formulated in a receding horizon manner by designing the objective function and constraints for the defenders and intruders, respectively. Their objective functions are coupled because they both consider the predicted interactions between the intruders and defenders. Therefore, a distributed proximal iterative best response scheme is designed for the group of defenders to cooperatively compute the Nash equilibrium. Each defender iteratively solves its own and its interception target's optimization problems, and shares information within the defender group. Since the defenders cannot know the parameters of the intruders' objective functions, an unscented Kalman filter-based estimator is constructed to online estimate the opponent's unknown parameters. Extensive simulation experiments verify the effectiveness of the proposed method.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142923865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A generalized maximum correntropy based constraint adaptive filtering: Constraint-forcing and performance analyses.

ISA transactions Pub Date : 2024-12-19 DOI: 10.1016/j.isatra.2024.12.016

Ji Zhao, Wenyue Li, Qiang Li, Hongbin Zhang

{"title":"A generalized maximum correntropy based constraint adaptive filtering: Constraint-forcing and performance analyses.","authors":"Ji Zhao, Wenyue Li, Qiang Li, Hongbin Zhang","doi":"10.1016/j.isatra.2024.12.016","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.016","url":null,"abstract":"The quadratic cost functions, exemplified by mean-square-error, often exhibit limited robustness and flexibility when confronted with impulsive noise contamination. In contrast, the generalized maximum correntropy (GMC) criterion, serving as a robust nonlinear similarity measure, offers superior performance in such scenarios. In this paper, we develop a recursive constrained adaptive filtering algorithm named recursive generalized maximum correntropy with a forgetting factor (FF-RCGMC). This algorithm integrates the exponential weighted GMC criterion with a linear constraint framework based on least-squares. However, the lack of constraint information during the learning process may lead to divergence or malfunctioning of FF-RCGMC after a certain number of iterations because of round-off errors. To rectify this deficiency, we introduce a constraint-forcing strategy into FF-RCGMC, resulting in a more stable variant termed robust type constraint-forcing FF-RCGMC (CFFF-RCGMC). In the context of CFFF-RCGMC, we embark on a thorough examination of its computational burden, encompassing both mean and mean-square stability analyses, along with an in-depth exploration of its transient and steady-state filtering characteristics under a set of plausible assumptions. Our simulation-based evaluations, specifically tailored for system identification tasks within non-Gaussian noisy environments, unequivocally underscore the excellent performance of CFFF-RCGMC when against its relevant algorithmic counterparts.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142879123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A faulty simulation model guided Ramanujan Digital twin architecture for rotating machine health monitoring.

ISA transactions Pub Date : 2024-12-19 DOI: 10.1016/j.isatra.2024.12.014

Wenyang Hu, Tianyang Wang, Fulei Chu

{"title":"A faulty simulation model guided Ramanujan Digital twin architecture for rotating machine health monitoring.","authors":"Wenyang Hu, Tianyang Wang, Fulei Chu","doi":"10.1016/j.isatra.2024.12.014","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.014","url":null,"abstract":"The conventional widely-used health monitoring methods for rotating machines have shortcomings such as the reliance on the selection of the preset parameters. Also, the strong noise interference caused by factors such as transmission path hinders the practical application of many fault feature extraction methods. To overcome these gaps, the digital twin notion is introduced and a new digital twin architecture called the Ramanujan Digital Twin (RDT) is designed. The Ramanujan Periodic Transform (RPT) model is employed to isolate the potential fault feature. For each frame in the whole life cycle of the rotating machine, the high-fidelity simulation model is constructed. Once the high-fidelity simulation-induced virtual sample is obtained, the RPT will be used to provide guidance information about the potential fault. With this information, the potential fault feature can be extracted without preset parameter selection. A health indicator (HI) can be constructed to perform multiple service end tasks including health monitoring and early fault prediction. Two case studies are carried out and the results show the proposed method can not only extract the potential fault feature more effectively with less noise interference but also monitor and predict the potential early fault earlier than fault log.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cooperative regulation based on virtual vector triangles asymptotically compressed in multidimensional space for time-varying nonlinear multi-agent systems. 基于在多维空间中渐进压缩的虚拟向量三角形的合作调节，适用于时变非线性多代理系统。

ISA transactions Pub Date : 2024-12-19 DOI: 10.1016/j.isatra.2024.12.021

Zhaoxin Wang, Jianchang Liu

{"title":"Cooperative regulation based on virtual vector triangles asymptotically compressed in multidimensional space for time-varying nonlinear multi-agent systems.","authors":"Zhaoxin Wang, Jianchang Liu","doi":"10.1016/j.isatra.2024.12.021","DOIUrl":"https://doi.org/10.1016/j.isatra.2024.12.021","url":null,"abstract":"This study constructs virtual vector triangles in multidimensional space to address cooperative control issue in time-varying nonlinear multi-agent systems. The distributed adaptive virtual point and its dynamic equations are designed, with this virtual point, the leader, and the follower being respectively defined as the vertices of the virtual vector triangle. The virtual vector edges, decomposed by vectors into coordinate axis components, are organized to form a closed virtual vector triangle by connecting the three vertices with directed vector arrows that are oriented from the tail to the head. Specifically, these virtual vector edges are fictitious vector line segments connecting two vertices and used to compute the relative Euclidean distances between each vertex in multidimensional space. Based on the established virtual vector triangles, which are placed in multidimensional space, and the novel spatial coordinate transformation method, the cooperative regulation problem of the time-varying nonlinear multi-agent system is transformed into a mathematical problem of compressing the virtual vector triangles with exponential magnitude. The created distributed compression control protocol asymptotically shrinks the magnitude of the virtual vector triangles by exponential oscillatory decay towards the same dynamic point aligned with the motion trajectory of the leader or the leader, where the states of the time-varying nonlinear multi-agent systems achieve asymptotic convergence consensus. The reliable stability of the asymptotic compression convergence process of the virtual vector triangles was verified by establishing a Lyapunov function and relying on the Lyapunov stability theory. Finally, the example of time-varying nonlinear multi-agent systems are presented for simulation experiments to further validate the effectiveness and feasibility of the proposed control protocol in addressing the cooperative regulation issue.","PeriodicalId":94059,"journal":{"name":"ISA transactions","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0