Complex engineering systems (Alhambra, Calif.)最新文献

Event-triggered model predictive tracking control of aero-engine with varying prediction horizon 变预测视界航空发动机事件触发模型预测跟踪控制

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-10-29 DOI: 10.20517/ces.2023.22

Yu Peng, Ning Xu, Peng Li, Shuoshuo Liu, Xudong Zhao

{"title":"Event-triggered model predictive tracking control of aero-engine with varying prediction horizon","authors":"Yu Peng, Ning Xu, Peng Li, Shuoshuo Liu, Xudong Zhao","doi":"10.20517/ces.2023.22","DOIUrl":"https://doi.org/10.20517/ces.2023.22","url":null,"abstract":"Aero-engine is a complex thermal-mechanical system with strong nonlinearity, uncertainty, and time variation. Thus, it is crucial to design an effective controller for such a complex system to obtain the desired performances of the aero-engine. In recent years, model predictive control (MPC) has shown great potential in dealing with control problems with complex constraints of multi-variable systems, which has been applied to aero-engine control, achieving good results. Furthermore, the MPC strategy using an event-driven mechanism is good at balancing system resources and ensuring system control performances. In this paper, the problem of event-triggered MPC for aero-engine systems with bounded disturbances is studied. Firstly, an event-triggered strategy with a dynamic forced-trigger mechanism is proposed. Then, an MPC algorithm based on an event-triggered mechanism is designed. Finally, an application to the JT9D aero-engine model provided by T-MATS verifies the effectiveness of the designed algorithm. It is shown that the calculation load is significantly reduced, which proves the superiority of this method.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"307 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136135468","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

AWF-YOLO: enhanced underwater object detection with adaptive weighted feature pyramid network AWF-YOLO:基于自适应加权特征金字塔网络的增强水下目标检测

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-09-19 DOI: 10.20517/ces.2023.19

Qianren Guo, Yuehang Wang, Yongji Zhang, Hongde Qin, Hong Qi, Yu Jiang

{"title":"AWF-YOLO: enhanced underwater object detection with adaptive weighted feature pyramid network","authors":"Qianren Guo, Yuehang Wang, Yongji Zhang, Hongde Qin, Hong Qi, Yu Jiang","doi":"10.20517/ces.2023.19","DOIUrl":"https://doi.org/10.20517/ces.2023.19","url":null,"abstract":"Underwater scenarios are influenced by various factors such as light attenuation, scattering, and absorption, which degrade the quality of images and pose significant challenges for underwater object detection in marine research and ocean engineering. To address these challenges, we propose a novel adaptive-weight feature detection framework based on YOLOv8, called AWF-YOLO, designed to detect objects in turbid underwater scenarios accurately. AWF-YOLO incorporates several key components to improve detection performance. Firstly, a novel adaptive-weight feature pyramid network is introduced to facilitate the fusion of multi-scale feature semantics. In addition, an adaptive-weight feature extraction module is proposed to enhance underwater object detection by capturing relevant and discriminative information to enhance feature extraction further. We integrate a dedicated small object detection head into the detection network to overcome the challenges associated with detecting small objects in complex underwater scenarios. This component focuses on effectively identifying and localizing small objects, leading to improved overall detection accuracy. Extensive experiments conducted on the detection underwater objects dataset demonstrate that the proposed AWF-YOLO achieves significant performance improvements, thus making it highly suitable for complex and dynamic underwater scenarios.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135107483","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

Model predictive control of multi-objective adaptive cruise system based on extension theory 基于可拓理论的多目标自适应巡航系统模型预测控制

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-09-13 DOI: 10.20517/ces.2023.15

Zhutao Li, Xinxin Zhao, Jue Yang, Menglei Liu

引用次数: 0

Event-triggered state estimation for complex networks under deception attacks: a partial-nodes-based approach 欺骗攻击下复杂网络的事件触发状态估计:一种基于部分节点的方法

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-08-29 DOI: 10.20517/ces.2023.16

Lu Zhou, Bing Li

{"title":"Event-triggered state estimation for complex networks under deception attacks: a partial-nodes-based approach","authors":"Lu Zhou, Bing Li","doi":"10.20517/ces.2023.16","DOIUrl":"https://doi.org/10.20517/ces.2023.16","url":null,"abstract":"This paper addresses the issue of state estimation for a kind of complex network (CN) with distributed delays and random interference through output measurements. In the data transmission, the deception attacks are taken into account by resorting to a sequence of Bernoulli random variables with a given probability. Considering the complexity of the network, the fact that only partial output measurements are available in practical environments presents a new challenge. Therefore, the partial-nodes-based (PNB) state estimation problem is proposed. For the sake of data collision avoidance and energy saving, a general event-triggered scheme is adopted in the design of the estimator. A novel estimator is constructed to consider both cyber attacks and resource limitations, filling the gap in previous results on PNB state estimation. By using the Lyapunov method and several stochastic analysis techniques, a few sufficient conditions are derived to guarantee the desired security and convergency performance for the overall estimation error. The estimator gains are obtained by solving a set of matrix inequalities with nonlinear constraints. At last, two examples and simulations are presented to further show the efficiency of the proposed method.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43523262","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

Rolling bearing fault diagnosis method based on 2D grayscale images and Wasserstein Generative Adversarial Nets under unbalanced sample condition 非平衡样本条件下基于二维灰度图像和Wasserstein生成对抗网络的滚动轴承故障诊断方法

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-08-21 DOI: 10.20517/ces.2023.20

Jiaxing He, Zhaomin Lv, Xingjie Chen

{"title":"Rolling bearing fault diagnosis method based on 2D grayscale images and Wasserstein Generative Adversarial Nets under unbalanced sample condition","authors":"Jiaxing He, Zhaomin Lv, Xingjie Chen","doi":"10.20517/ces.2023.20","DOIUrl":"https://doi.org/10.20517/ces.2023.20","url":null,"abstract":"Accurate diagnosis of rolling bearing faults plays a crucial role in ensuring the stable operation of rotating machinery systems. However, in actual engineering applications, a significant disparity between the volume of normal data and the quantity of fault data collected impairs diagnostic performance. Bearing fault diagnosis under sample imbalance conditions is an engineering challenge encountered in the field of fault diagnosis. To improve the fault diagnosis accuracy under unbalanced sample conditions, a rolling bearing fault diagnosis method based on 2D grayscale images and Wasserstein Generative Adversarial Networks (WGAN) is proposed. The method consists of three main steps. First, the acquired bearing vibration signals are transformed into 2D grayscale images. Second, the WGAN generation model is used to generate more fault samples. Finally, both the original samples and the generated samples are used to train the Convolutional Neural Networks classification model. The validity and effectiveness of the proposed method are evaluated and compared to other bearing fault diagnosis approaches using the Case Western Reserve University Bearing Data Center dataset. The experimental results demonstrate the superior quality of the generated samples and the improved fault identification accuracy achieved by the proposed method.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44088803","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

Robust adaptive finite-time course tracking control of vessel under actuator attacks 舰船在执行器攻击下的鲁棒自适应有限时间航向跟踪控制

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-07-26 DOI: 10.20517/ces.2023.18

Xiangfei Meng, Gui-chen Zhang, B. Han

引用次数: 0

Region stability of switched two-dimensional linear dissipative Hamiltonian systems with multiple equilibria 具有多平衡态的切换二维线性耗散哈密顿系统的区域稳定性

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-07-26 DOI: 10.20517/ces.2023.13

Tongsu Liu, Liying Zhu

{"title":"Region stability of switched two-dimensional linear dissipative Hamiltonian systems with multiple equilibria","authors":"Tongsu Liu, Liying Zhu","doi":"10.20517/ces.2023.13","DOIUrl":"https://doi.org/10.20517/ces.2023.13","url":null,"abstract":"This paper studies the issues of region stability of switched two-dimensional linear dissipative Hamiltonian systems. Such switched systems are composed of two stable subsystems with two different equilibrium points. Since the equilibrium points of two subsystems are different, and the state matrices of subsystems may not commute, it is difficult to address such switched systems. This paper considers the case that the switching path corresponding to the switched systems is a switching line passing through the equilibrium points of two different subsystems. A suitable region containing all the equilibrium points of subsystems is first determined. Based on the concept of region stability of switched systems with multiple equilibrium points, this paper proposes some sufficient conditions of region stability and asymptotically region stability for such kind of switched linear dissipative Hamiltonian systems via the maximum energy function method. The above main results obtained can be applied to some classes of electronic circuits, such as switching DC/DC converters and AC/DC converters. As an application and illustration, a switching DC circuit and two numerical examples are carried out to show the effectiveness of the region stability results obtained in this paper.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67657288","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

Fixed-time integral sliding mode tracking control of a wheeled mobile robot 轮式移动机器人的定时积分滑模跟踪控制

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-06-29 DOI: 10.20517/ces.2023.14

Ling Ma, Cheng-You Wang, Cheng Ge, Hui Liu, Bo Li

引用次数: 0

Decentralized control for interconnected semi-markovian jump systems with partially accessible transition rates: a dynamic memory event-triggered mechanism 具有部分可达转换率的互联半马尔可夫跳跃系统的分散控制:一种动态记忆事件触发机制

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-01-01 DOI: 10.20517/ces.2023.10

Yushun Tan, Xiaoming Cheng, Xinrui Li, Jie Bai, Jinliang Li

引用次数: 0

Parameters optimization of electro-hydraulic power steering system based on multi-objective collaborative method 基于多目标协同方法的电液助力转向系统参数优化

Complex engineering systems (Alhambra, Calif.) Pub Date : 2023-01-01 DOI: 10.20517/ces.2022.57

Taowen Cui, Shuai Wang, Y. Qu, Xiang Chen

{"title":"Parameters optimization of electro-hydraulic power steering system based on multi-objective collaborative method","authors":"Taowen Cui, Shuai Wang, Y. Qu, Xiang Chen","doi":"10.20517/ces.2022.57","DOIUrl":"https://doi.org/10.20517/ces.2022.57","url":null,"abstract":"Electro-hydraulic power steering (EHPS) systems are widely used in commercial vehicles due to their adjustable power assist and energy-saving advantages. In this paper, a dynamic model of the EHPS system is developed, and quantitative expressions for three evaluation indexes, steering road feel, steering sensibility and steering energy loss, are derived for the first time. A multi-objective collaborative optimization model of the EHPS system is then established, which consists of one total system and three parallel subsystems, based on collaborative optimization theory. Considering the coupled variables of each subsystem, the total system is optimized by a multi-objective algorithm, while the subsystems are optimized by a single-objective algorithm. The optimization results demonstrate that the average frequency domain energy of the steering road feel is increased by 69.1%, the average frequency domain energy of steering sensitivity is reduced by 19.2%, and steering energy consumption is reduced by 10.8% compared to the initial value. The non-dominated sorting genetic algorithm-II (NSGA-II) shows superior comprehensive performance compared to the other two multi-objective algorithms, and the optimization performance can be further improved by setting appropriate algorithm parameters.","PeriodicalId":72652,"journal":{"name":"Complex engineering systems (Alhambra, Calif.)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67657168","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