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Resilient sliding mode control for 2D CPSs under denial-of-service attacks

science China(Information sciences) 2024年第6期67卷 262-278页

作者： Lingling LI Rongni YANG Zhiguang FENG Ligang WU College of Intelligent Systems Science and Engineering Harbin Engineering University School of Control Science and Engineering Shandong University School of Astronautics Harbin Institute of Technology

This study addresses the resilient sliding mode control(SMC) problem for two-dimensional cyber-physical systems(2D CPSs) characterized by the Roesser model under denial-of-service attack(DoSA), which can interfere with signal transmission over the communication network. First, the DoS-A model is established by introducing constraints on the Do S frequency and duration. Then, based on active or silent attack situations, the considered system is described as a switched mode. Furthermore, together with Lyapunov theory, the average dwell time technique is employed to deduce sufficient criteria that assure the existence of the desired sliding mode controller. Finally, verification examples are provided to show the validity of the established SMC scheme.

关键词： two-dimensional systems cyber-physical systems denial-of-service attack resilient sliding mode control

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Research on UAV cloud control system based on ant colony algorithm

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Journal of systems engineering and Electronics 2022年第4期33卷 805-811页

作者： ZHANG Lanyong ZHANG Ruixuan School of Intelligent Science and Engineering Harbin Engineering UniversityHarbin 150001China

In the cloud era, the control objects are becoming larger and the information processing is more complex, and it is difficult for traditional control systems to process massive data in a timely manner. In view of the difficulty of data processing in the cloud era, it is extremely important to perform massive data operations through cloud servers. Unmanned aeriel vehicle(UAV) control is the representative of the intelligent field. Based on the ant colony algorithm and incorporating the potential field method, an improved potential field ant colony algorithm is designed. To deal with the path planning problem of UAVs, the potential field ant colony algorithm shortens the optimal path distance by 6.7%, increases the algorithm running time by39.3%, and increases the maximum distance by 24.1% compared with the previous improvement. The cloud server is used to process the path problem of the UAV and feedback the calculation results in real time. Simulation experiments verify the effectiveness of the new algorithm in the cloud environment.

关键词： ant colony algorithm potential field method cloud server path planning

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Analysis of Rapid Re-initialization Performance of Precise Point Positioning for Low-Cost Receiver 14th

Analysis of Rapid Re-initialization Performance of Precise P...

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14th China Satellite Navigation Conference, CSNC 2024

作者： Luo, Fenghua Zhao, Lin Yang, Fuxin Sun, Zhiguo Zhang, Jie College of Intelligent System Science and Engineering Harbin Engineering University Harbin China

ISBN: (纸本)9789819969432

The tracking loop performance of low-cost receiver is poor, and the risk of satellite signal loss increases, resulting in frequent carrier phase cycle slip. The conventional satellite-by-satellite cycle slip processing method initializes the carrier phase ambiguity with cycle slip, decreases precise point positioning performance, and may lead to re-initialization. To avoid the degradation of positioning performance and even PPP re-initialization caused by cycle slip processing of the low-cost receiver, we proposed a method of partial cycle slip fixing based on the time-differenced model for low-cost receiver. In this method, the cycle slip subset is selected by quality control, and then the cycle slip is estimated and fixed by the time-differenced observation. The proposed method is verified with collected BDS and GPS dual-frequency data using a u-blox low-cost receiver, and the results show that the method adopted in this paper can correctly fix the cycle slip and achieve rapid PPP re-initialization, and improve the continuity of PPP high-precision positioning results of the low-cost receiver. © 2024, Aerospace Information Research Institute.

关键词： Satellites

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An Observer-Based Feedforward Compensation for Additional Torque Disturbances of Permanent Magnet Synchronous Machines

An Observer-Based Feedforward Compensation for Additional To...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Ren, Yueru Zeng, Depeng Han, Liangheng Gao, Pengyu Hong, Junjie Zhang, Kun Guo, Kai College of Intelligent System Science and Engineering Harbin Engineering University Harbin150001 China

ISBN: (纸本)9798331530174

The speed of the Permanent Magnet Synchronous Machine (PMSM) fluctuates due to sudden load torque changes. The fluctuating speed has a negative impact on the performance of the system. To address this problem, an observer-based feedforward compensation method for additional load torque disturbance is proposed in this paper. First, the load torque observer is comprehensively designed with its pole configuration method proposed. Second, incomplete and complete feedforward compensation methods for disturbance rejection are analyzed. The proposed complete feedforward compensation method for disturbance rejection further reduces the effect of load torque disturbances on the system. Finally, the effectiveness of the method is verified by the simulation results, which show that the proposed method effectively reduces the impact of sudden load torque changes on the speed of the system. © 2024 IEEE.

关键词： Disturbance rejection

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Two Stages Segmentation Algorithm of Breast Tumor in DCE-MRI Based on Multi-Scale Feature and Boundary Attention Mechanism

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Computers, Materials & Continua 2024年第7期80卷 1543-1561页

作者： Bing Li Liangyu Wang Xia Liu Hongbin Fan Bo Wang Shoudi Tong School of Automation Harbin University of Science and TechnologyHarbin150080China Heilongjiang Provincial Key Laboratory of Complex Intelligent System and Integration Harbin150080China School of Computer Engineering Technology Guangdong Institute of Science and TechnologyZhuhai519090China

Nuclearmagnetic resonance imaging of breasts often presents complex *** tumors exhibit varying sizes,uneven intensity,and indistinct *** characteristics can lead to challenges such as low accuracy and incorrect segmentation during tumor ***,we propose a two-stage breast tumor segmentation method leveraging multi-scale features and boundary attention ***,the breast region of interest is extracted to isolate the breast area from surrounding tissues and ***,we devise a fusion network incorporatingmulti-scale features and boundary attentionmechanisms for breast tumor *** incorporate multi-scale parallel dilated convolution modules into the network,enhancing its capability to segment tumors of various sizes through multi-scale convolution and novel fusion ***,attention and boundary detection modules are included to augment the network’s capacity to locate tumors by capturing nonlocal dependencies in both spatial and channel ***,a hybrid loss function with boundary weight is employed to address sample class imbalance issues and enhance the network’s boundary maintenance capability through additional *** was evaluated using breast data from 207 patients at RuijinHospital,resulting in a 6.64%increase in Dice similarity coefficient compared to the *** results demonstrate the superiority of the method over other segmentation techniques,with fewer model parameters.

关键词： Dynamic contrast-enhanced magnetic resonance imaging(DCE-MRI) breast tumor segmentation multi-scale dilated convolution boundary attention the hybrid loss function with boundary weight

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Quasi-anti-parity–time-symmetric single-resonator micro-optical gyroscope with Kerr nonlinearity

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Chinese Physics B 2024年第1期33卷 436-440页

作者：耿靖童徐书逸靳婷丁舒林杨柳王颖张勇刚 College of Intelligent Systems Science and Engineering Harbin Engineering UniversityHarbin 150001China National Laboratory of Solid State Microstructures School of Physicsand College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

Parity–time(PT) and quasi-anti-parity–time(quasi-APT) symmetric optical gyroscopes have been proposed recently which enhance Sagnac frequency splitting. However, the operation of gyroscopes at the exceptional point(EP) is challenging due to strict fabrication requirements and experimental uncertainties. We propose a new quasi-APT-symmetric micro-optical gyroscope which can be operated at the EP by easily shifting the Kerr nonlinearity. A single resonator is used as the core sensitive component of the quasi-APT-symmetric optical gyroscope to reduce the size, overcome the strict structural requirements and detect small rotation rates. Moreover, the proposed scheme also has an easy readout method for the frequency splitting. As a result, the device achieves a frequency splitting 10~5 times higher than that of a classical resonant optical gyroscope with the Earth's rotation. This proposal paves the way for a new and valuable method for the engineering of micro-optical gyroscopes.

关键词： optical gyroscopes quasi-anti-parity–time(quasi-APT)symmetric system exceptional point(EP) the Kerr nonlinearity

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UAV Formation Cooperative Control Based on Consistency Theory 7th

UAV Formation Cooperative Control Based on Consistency Theor...

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7th Chinese Conference on Swarm Intelligence and Cooperative Control, CCSICC 2023

作者： Liu, Mengding Chi, Haihong School of Intelligent Science and Engineering Harbin Engineering University Harbin China

ISBN: (纸本)9789819733392

In order to accomplish the task of formation maintenance during coordinated UAV cluster flights, a position cooperative control algorithm based on consistency theory is proposed. In this paper, the conventional algorithm of consistency theory is improved by introducing a desired relative distance term between UAVs in order to form a desired formation when the positional states of the system reach consensus. A potential energy function term is further introduced to improve the system's ability to avoid collision and maintain communication. The stability, collision avoidance and communication maintenance capabilities are then demonstrated by Lyapunov's second method. Finally, the 3D motion trajectories of the system, relative distances between UAVs, positions and attitude over time curves through simulation experiments are analyzed. The simulation results show that the algorithm can keep the UAV formation flying in line with the predetermined formation, has good anti-interference ability, and basically solves the problem of collision avoidance and communication maintenance. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Unmanned aerial vehicles (UAV)

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Optimization of Cluster Transportation Task Scheduling Based on Reinforced Genetic Algorithm 7

Optimization of Cluster Transportation Task Scheduling Based...

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7th International Conference on Advanced Algorithms and Control engineering, ICAACE 2024

作者： Li, Jiaqi Zhang, Zhi Shang, Xiaobing School Of Intelligent Science And Engineering Harbin Engineering University Harbin China

ISBN: (纸本)9798350361445

In the current highly intelligent environment, how to optimize the material distribution route with more intelligent and effective methods before the task starts to be executed to achieve better task allocation has become the key to reduce one's own cost and improve the rate of return, and it is also a major challenge. In order to solve this problem well, this paper proposes a reinforced genetic algorithm (RGA) which combines Levy flight and Q-learning reinforcement learning method to optimize the task scheduling scheme in the process of material distribution. The variant of the multi-traveling salesman problem is used as a model to test the performance of the algorithm. According to the experimental results, by introducing Q-learning to dynamically adjust the crossover and mutation probability, and introducing Levy flight strategy for auxiliary optimization, the proposed method can get the optimal solution more easily. Therefore, the proposed algorithm has excellent optimization ability and stability, and it is easier to get a reasonable task scheduling method when applied, and it can effectively reduce the distribution cost. © 2024 IEEE.

关键词： Genetic algorithms

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Research on Data-Driven Transient Stability Assessment Method for Ship Power systems

Research on Data-Driven Transient Stability Assessment Metho...

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2024 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2024

作者： Song, Ziwei Lu, Fang Harbin Engineering University School Of Intelligent Science And Engineering Harbin China

ISBN: (纸本)9798331529277

As the scale of ship power systems expands, it becomes increasingly necessary to quickly and accurately assess the transient stability of the system to ensure its safe operation. In recent years, data-driven artificial intelligence (AI) methods have gained attention for their speed, accuracy, and strong generalization capabilities. Given the current limitations in utilizing existing specialized software to perform precise transient calculations for ship power systems, this study establishes a comprehensive mathematical model of the ship power system. Time-domain simulations under various disturbances are conducted to build a dataset for training neural networks. A neural network classification model combining a denoising autoencoder (DAE) and a long short-term memory (LSTM) network is developed to achieve real-time transient stability assessment of ship power systems. To address the decline in model performance under different operating conditions and the time-consuming process of re-collecting data and retraining models, transfer learning (TL) is employed for the transient stability assessment of ship power systems. © 2024 IEEE.

关键词： Transient stability

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Color Point Cloud Registration Algorithm Based on Local Gray Order Pattern 43

Color Point Cloud Registration Algorithm Based on Local Gray...

引用

43rd Chinese Control Conference, CCC 2024

作者： Lu, Jun Qin, Kaibin Wang, Wenlin Qiao, Pengfei Du, Hongjin Zhang, Songhui Harbin Engineering University School of Intelligent Science and Engineering Harbin150001 China

ISBN: (纸本)9789887581581

With the advancement of sensor technology, the acquisition of color point clouds has become increasingly convenient, providing valuable information for point cloud registration. In pursuit of more effective use of color information and improvement of both speed and accuracy in point cloud registration, we propose a novel algorithm for color point cloud registration based on a local gray order pattern. A color feature key point extraction algorithm based on Features from Accelerated Segment Test (FAST) is first introduced, and then the color distribution of adjacent points of the extracted key points is used to describe the features of the key points to establish the feature descriptor based on the local gray order pattern (LGOP). Experimental results show that the proposed algorithm significantly enhances the accuracy of point cloud matching without a corresponding increase in computational time for the point clouds with color information. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Cloud platforms

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