Article
Engineering, Civil
Jianzhong Chen, Huan Liang, Jing Li, Zekai Lv
Summary: This study focuses on the practical actuator constraints and spacing strategies in automated vehicle platoon control systems, proposing a new control approach that incorporates input saturation and VTH spacing strategy in the consensus algorithm. Numerical simulation results demonstrate the effectiveness of the proposed approach and the necessity of introducing these constraint strategies.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Automation & Control Systems
Xiao-Jie Peng, Yong He
Summary: This article investigates the consensus problem of multiagent systems with different communication topologies and time-varying delays. A delay-product-type Lyapunov-Krasovskii functional based on an auxiliary function-based integral inequality is proposed, along with a generalized reciprocally convex matrix inequality and a relaxed quadratic function negative-determination lemma to obtain more conservative consensus conditions. The results are extended to the leader-following consensus of agents under Lipschitz nonlinear dynamics.
IEEE TRANSACTIONS ON CYBERNETICS
(2022)
Article
Automation & Control Systems
Haifeng Li, Zhenping Chen, Baochuan Fu, Manman Sun
Summary: Vehicle platooning can increase transportation throughput, but communication impairment may affect control performance. Communication delays during driving are inevitable and cause platoon instability. Additionally, limited transmission power results in a restricted communication range. A nonlinear control algorithm is proposed, considering car-following interactions. A heterogeneous dynamic model is established for vehicles. Control gains and parameters are heterogeneous. Conditions for maintaining internal stability and upper bound on time-varying communication delays are derived. String stability conditions considering limited communication range are obtained. Numerical simulations validate the effectiveness of the proposed controller.
INTERNATIONAL JOURNAL OF CONTROL AUTOMATION AND SYSTEMS
(2023)
Article
Engineering, Civil
Guangming Liu, Yonggui Liu, Xuhuan Xie
Summary: This paper investigates the consensus problem of a class of third-order discrete-time connected autonomous vehicle systems with constant delay and multiplicative noise. Through designing cooperative look-ahead control strategies and deriving necessary and sufficient consensus conditions, the explicit relation among system parameters is revealed and the optimal control design problem and string stability problem are solved.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Automation & Control Systems
Hao Zhang, Juan Liu, Zhuping Wang, Chao Huang, Huaicheng Yan
Summary: This article studies the control problem of connected vehicle platoon with unknown input delays. A decentralized control law and a switching-type delay-adaptive predictor are proposed to ensure the stability and safety spacing of the connected vehicles, as well as adapt to different time intervals.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Engineering, Civil
Darong Huang, Shaoqian Li, Zhenyuan Zhang, Yang Liu, Bo Mi
Summary: This study provides a distributed linear feedback control law that considers time-varying delay with guaranteed internal and string stability of the platoon system under various communication topologies. The research uses a precise linearized model and directed graphs to describe different communication topologies, and designs a linear feedback control law and stability theorems to determine the stable zone and upper bound of time-varying delay.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Civil
Yonggui Liu, Huanli Gao, Chunjie Zhai, Wei Xie
Summary: The leader-following consensus method is studied in connected vehicle systems with constant time delay. The distributed control protocols are designed for second-order CVSs with time delay. Necessary and sufficient conditions for internal stability are derived, considering both absence and presence of time delays, while also taking into account the influence of perturbations.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Chang-Jiang Li, Guo-Ping Liu, Liang Qi, Jianzhen Li, Zhaoping Du, Xiaofei Yang
Summary: This study investigates the consensus problem for networked delayed multi-agent systems with switching topologies and time-varying communication delays. It proposes a novel consensus protocol that utilizes (pseudo) predictive scheme to synchronize the states of agents. Sufficient consensus conditions are derived, and the results demonstrate that state consensus can be ensured if the graphs contain a joint spanning tree as frequently as the system evolves and no eigenvalues of system matrix exist outside the unit circle. Numerical examples are provided to illustrate the theoretical results.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Engineering, Civil
Hang Zhao, Yongfu Li, Wei Hao, Srinivas Peeta, Yibing Wang
Summary: This study evaluates the effects of different switching periods of communication topologies and delays on the dynamic performance and energy consumption of electric connected vehicle traffic streams, utilizing a communication topology characterization method and a new car-following model. The results demonstrate that these factors impact vehicle interactions and can be explored through stability analysis and simulation experiments.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Engineering, Civil
Yongfu Li, Bangjie Chen, Hang Zhao, Srinivas Peeta, Simon Hu, Yibing Wang, Zuduo Zheng
Summary: This paper proposes a new car-following model that accurately captures the behaviors of connected and automated vehicles. By considering different communication topologies and time delays, the model achieves good convergence performance and accurately predicts the velocity, acceleration, and position of the vehicles.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Qiang Jia, Zeyu Han, Wallace K. S. Tang
Summary: This work investigates the synchronization problem in a dynamical network with nonlinear nodes, directed couplings, and heterogeneous delays. The authors propose a time-varying pinning control strategy and introduce an indicator to measure the synchronizability of the network. Criteria are derived to ensure exponential synchronization and estimate the maximum admissible coupling delay. Numerical examples are provided to demonstrate the applicability of the proposed theorem and corollaries.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Automation & Control Systems
Dan Zhang, Ye-Ping Shen, Si-Quan Zhou, Xi-Wang Dong, Li Yu
Summary: This article investigates the impact of denial-of-service attacks on distributed secure platoon control in sampling time instants, and proposes a solution based on a time-delay system model, obtaining sufficient conditions for exponential tracking performance using Lyapunov stability theory. The design conditions establish quantitative relationships between attack parameters and system performance, and critical values for attack frequency and sampling interval are derived. Simulation and experiment studies on a network of four vehicles are introduced to validate the design.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
Article
Automation & Control Systems
Chang-Jiang Li, Guo-Ping Liu, Ping He, Feiqi Deng, Heng Li
Summary: This study investigates the dynamic consensus problem in networked multiagent systems. Novel consensus protocols are proposed using only relative state information, with sufficient conditions derived for dynamic consensus. Results demonstrate that consensus can be achieved with sufficiently small gain and sufficiently frequent mixing or presence of a spanning tree in the interaction graphs.
IEEE TRANSACTIONS ON CYBERNETICS
(2022)
Article
Engineering, Civil
Yongfu Li, Qingxiu Lv, Hao Zhu, Haiqing Li, Huaqing Li, Simon Hu, Shuyou Yu, Yibing Wang
Summary: This article proposes a new platoon control strategy for heterogeneous connected vehicles, taking into account time delays and external disturbances. A novel platoon controller is developed based on the third-order vehicle model, embedding the variable time headway policy and nonlinear motion coupling interactions between vehicles. An integral sliding mode controller is also utilized to resist disturbances. The asymptotic stability condition and communication delay upper bound are deduced using the Lyapunov theorem, and the string stability is proven using the infinity-norm method. Extensive simulations and experiments with intelligent micro vehicles validate the effectiveness and practical feasibility of the developed controller.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Civil
Yudong Lin, Anuj Tiwari, Brian Fabien, Santosh Devasia
Summary: This paper proposes an approach to improve the performance of constant-spacing vehicle platoons by mitigating large delays and communication loss. The approach achieves a significant reduction in settling time to consensus under large communication delays and minimizes steady-state errors under loss of communication.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Computer Science, Software Engineering
Chuanjun Ji, Yadang Chen, Zhi-Xin Yang, Enhua Wu
Summary: This paper explores the spatial-temporal redundancy issue in video object segmentation under a semi-supervised context and proposes an efficient VOS method. The proposed method reduces redundancy through spatio-temporal compression and improves computational efficiency through an efficient memory reader. Experimental results demonstrate its high performance on multiple datasets.
Article
Automation & Control Systems
Zhen Li, Peihua Xu, Xian-Bo Wang
Summary: This paper proposes a new method for predicting the remaining useful life (RUL) of rotating machinery equipment. By introducing discrete wavelet transform (DWT) to decrease noise and using sliding average method to weaken transient excitation, the proposed method achieves better RUL prediction efficiency. Experimental results demonstrate that it outperforms existing methods in terms of efficiency and convergence.
MEASUREMENT & CONTROL
(2023)
Article
Chemistry, Physical
Yujun Shi, Kaijun Zhang, Sen Ding, Zhaoyang Li, Yuhao Huang, Yucong Pi, Dazhe Zhao, Yaowen Zhang, Renkun Wang, Binpu Zhou, Zhi-Xin Yang, Junwen Zhong
Summary: This paper proposes a self-powered piezoelectret sensor based on foamed plastic garbage, which has the advantages of easy fabrication, excellent flexibility, and high equivalent piezoelectric coefficient. The stability of the output is verified through experiments, and the sensor is successfully applied to measure human pressure signals as well as real-time monitoring of human sitting information.
Article
Engineering, Mechanical
Di Ao, Pak Kin Wong, Wei Huang
Summary: A novel hierarchical direct yaw moment controller is developed to enhance lateral stability of four-wheel-drive electric vehicles. An upper-layer adaptive sliding mode control (ASMC) technique is employed to compute an additional yaw moment, which is distributed to each wheel using model predictive control allocation (MPCA) in the lower-layer controller. Co-simulation and hardware-in-the-loop (HIL) tests verify the superior performance of the proposed hierarchical ASMC-MPCA controller over sliding mode control MPCA (SMC-MPCA) and integrated nonlinear model predictive control (NMPC). The ASMC-MPCA controller also consumes less computational resources and effectively suppresses chattering phenomenon.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Jikun Wang, Weixiang Liang, Jiangang Yang, Shizheng Wang, Zhi-Xin Yang
Summary: In this work, a new adaptive image enhancement pipeline is introduced to enable robots to adapt to complex illumination conditions, addressing the issue of patrol and inspection in uncontrolled complex environments such as tunnels.
COMPUTERS IN INDUSTRY
(2023)
Article
Automation & Control Systems
Hao Chen, Xian-bo Wang, Zhi-Xin Yang
Summary: This study proposes a fast robust capsule network model augmented with a dynamic pruning technique and a mutual information loss for intelligent fault diagnosis. The model overcomes limitations in pooling layers and scale-invariant feature transformation by learning tensor representations of features. The dynamic pruning method reduces parameter scale and simplifies network topology while increasing robustness. The enhanced capsule function limits the similarity of capsules in the same layer to avoid homogeneous features. The proposed model successfully increases representation learning capacity by integrating local and global information through a multiscale mutual information loss.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Automation & Control Systems
Xiaolong Cui, Yifan Wu, Xiaoyuan Zhang, Jie Huang, Pak Kin Wong, Chaoshun Li
Summary: In this article, a new framework of fault diagnosis for the rotor with multiple bearings is proposed. By using multivariate complex variational mode decomposition (MCVMD) to decompose the complex-valued signals of multiple bearings, multiple orbit features are derived to construct fusion feature images. The deep convolutional network based on transfer learning is utilized for the fault diagnosis, and the experimental results demonstrate its superiority over existing approaches.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Mechanical
Jing Zhao, Yajuan Zhu, Pak Kin Wong, Wenfeng Li, Zhixin Yang, Panshuo Li, Chonghui Song
Summary: This paper investigates the non-fragile output feedback control problem of the uncertain vehicle active suspension with stochastic network-induced delay. A novel output feedback method is proposed by employing a variable substitution approach, taking gain perturbations into account. The complexity of signal transmission delay in network control process is represented using a more generalized lumped delay form, and a Markovian process is introduced to describe the stochasticity of lumped delay. Numerical simulations and experimental tests are carried out to examine the effectiveness and practicability of the proposed controller.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Mechanical
Pak Kin Wong, Mengqi Deng, Jing Zhao, Meisam Ahmadi Ghadikolaei, Hang Wang
Summary: This study designs a damping force controller to improve the vehicle ride comfort, road holding, and stability, as well as handle unknown air spring pressure effectively. An improved skyhook suspension reference model is developed to generate desired dynamic criteria, and a novel damping force controller based on backstepping technique is proposed. A parameter estimation method is also designed to estimate the air spring pressure for obtaining the air spring force. Numerical results show that the semi-active air suspension system based on the proposed model reference backstepping controller significantly improves ride comfort compared to passive suspension systems and existing sliding mode control.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Automation & Control Systems
Zhongchao Liang, Zhongnan Wang, Jing Zhao, Pak Kin Wong, Zhixin Yang, Zhengtao Ding
Summary: With the consideration of actuator faults, this article proposes a fixed-time control protocol for autonomous ground vehicles (AGVs) to follow reference paths and velocities with preset performance constraints. The proposed protocol, based on homeomorphic mapping and barrier Lyapunov theorem, integrates fault-tolerant scheme for the controlled AGV. Hardware-in-the-loop (HIL) test results show that the proposed control protocol always provides superior control performance for the AGV.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Yaxin Wang, Donglian Qi, Xianbo Wang, Yunfeng Yan
Summary: In smart grids, uncertain load demand and intermittent renewable energy generation have caused more frequency and voltage stability issues, putting significant pressure on turbine governor action. Load participation in primary control is one potential solution. This study investigates a general class of local load control (LLC) to provide grid frequency and voltage support while minimizing the pre-defined disutility to utilities and clients. The effectiveness and rationality of the proposed approach are verified through simulation-based comparative study and MATLAB/SIMULINK tests under various scenarios.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Multidisciplinary
Xiangqu Xiao, Chaoshun Li, Jie Huang, Tian Yu, Pak Kin Wong
Summary: Rolling bearings are essential for rotating equipment, but they are prone to failure due to their operating environment. This paper proposes an improved graph convolutional network (GCN) for limited labeled data in bearing fault diagnosis. The method simplifies the generated weighted graph-structured data by defining edge failure thresholds, thereby improving data quality and reducing training computation costs. The improved GCN effectively aggregates data features of different receptive field sizes without significantly increasing computational complexity. Experiments demonstrate the superiority and robustness of the proposed method on public datasets and an actual experimental platform.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Hao Chen, Xian-Bo Wang, Zhi-Xin Yang
Summary: In this study, a semi-supervised self-correcting graph neural network (SSGNN) is proposed for fault diagnosis, which effectively extracts features from vibrational signals and generates a graph-structured representation of fault knowledge. The proposed method shows higher accuracy and faster convergence speed compared to the state-of-the-art methods.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Automation & Control Systems
Zhijiang Gao, Pak Kin Wong, Jing Zhao, Zhixin Yang, Yingbo Huang, Jing Na
Summary: This article addresses the optimal control problem for magnetorheological fluid-based semiactive suspension systems with input saturation and time-varying delay. A robust switched H∞ method based on the Takagi-Sugeno fuzzy theory is proposed to handle this problem. A novel hybrid model incorporating the fluid flow mechanism and hysteresis phenomenon model is used to separate the passive and active components of the MRF damper. Linear matrix inequality conditions are derived to capture the features of input saturation and time-varying delay, and a Lyapunov-Krasovskii function is employed to ensure stability. Numerical examples demonstrate the effectiveness of the proposed method in dealing with the MRF-SAS system with input saturation and time-varying delay.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
