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Warehouse automation by logistic robotic networks: a cyber-physical control approach Tutorial

Kai Cai,kai.cai@eng.osaka-cu.ac.jp

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 5,   Pages 649-808 doi: 10.1631/FITEE.2000156

Abstract: In this paper we provide a tutorial on the background of using and survey relevant work in the literature. We present a new cyber-physical control method that achieves safe, deadlock-free, efficient, and adaptive behavior of multiple robots serving the goods-to-man logistic operations. A central piece of this method is the incremental supervisory control design algorithm, which is computationally scalable with respect to the number of robots. Finally, we provide a case study on 30 robots with changing conditions to demonstrate the effectiveness of the proposed method.

Keywords： 离散事件系统；信息物理系统；机器人网络；仓库自动化；物流    

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Application of direct adaptive fuzzy slidingmode control into a class of non-affine discrete nonlinear systems Article

Xiao-yu ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 12,   Pages 1331-1343 doi: 10.1631/FITEE.1500318

Abstract: Direct adaptive fuzzy sliding mode control design for discrete non-affine nonlinear systems is presented for trajectory tracking problems with disturbance. To obtain adaptiveness and eliminate chattering of sliding mode control, a dynamic fuzzy logical system is used to implement an equivalent control, in which the parameters are self-tuned online. Stability of the sliding mode control is validated using the Lyapunov analysis theory. The overall system is adaptive, asymptotically stable, and chattering-free. A numerical simulation and an application to a robotic arm with two degrees of freedom further verify the good performance of the control design.

Keywords： Nonlinear system     Discrete system     Dynamic fuzzy logical system     Direct adaptive     Sliding mode control    

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Containment control for heterogeneous nonlinear multi-agent systems under distributed event-triggered schemes Research Articles

Ya-ni Sun, Wen-cheng Zou, Jian Guo, Zheng-rong Xiang,xiangzr@njust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 1,   Pages 1-140 doi: 10.1631/FITEE.2000034

Abstract: We study the problem for high-order heterogeneous nonlinear under distributed event-triggered schemes. To achieve the objective and reduce communication consumption among agents, a scheme is proposed by applying the backstepping method, Lyapunov functional approach, and neural networks. Then, the results are extended to the self-triggered control case to avoid continuous monitoring of state errors. The developed protocols and triggered rules ensure that the output for each follower converges to the convex hull spanned by multi-leader signals within a bounded error. In addition, no agent exhibits . Two numerical simulations are finally presented to verify the correctness of the obtained results.

Keywords： Multi-agent systems     Distributed event-triggered control     Containment control     Heterogeneous nonlinear systems     Zeno behavior    

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Event-based H∞ control for piecewise-affine systems subject to actuator saturation Research Articles

Yonghao Jiang, Wei Wu, Xuyang Lou, Zhengxian Jiang, Baotong Cui,y.h.jiang@foxmail.com,weiwu@jiangnan.edu.cn,Louxy@jiangnan.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 5,   Pages 615-766 doi: 10.1631/FITEE.1900601

Abstract: We deal with event-triggered controller design for discrete-time s subject to . By considering saturation information, a novel event-triggered strategy is proposed to conserve communication resources. A based condition is derived based on a piecewise Lyapunov function. This condition guarantees the stability of the closed-loop system with a certain index and reduces the number of transmitted signals. Numerical examples are given to show the efficiency of our method.

Keywords： 事件触发控制；分段仿射系统；线性矩阵不等式；执行器饱和；H∞性能    

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Event-triggered dynamic output-feedback control for a class of Lipschitz nonlinear systems Research Article

Zhiqian LIU, Xuyang LOU, Jiajia JIA

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 11,   Pages 1684-1699 doi: 10.1631/FITEE.2100552

Abstract:

This paper investigates the problem of for a class of s. First, a continuous-time controller is constructed and sufficient conditions for stability of the nonlinear systems are presented. Then, a novel event-triggered mechanism is proposed for the s in which new event-triggered conditions are introduced. Consequently, a closed-loop hybrid system is obtained using the strategy. Sufficient conditions for stability of the closed-loop system are established in the framework of hybrid systems. In addition, an upper bound of a minimum inter-event interval is provided to avoid the Zeno phenomenon. Finally, numerical examples of a neural network system and a genetic regulatory network system are provided to verify the theoretical results and to show the superiority of the proposed method.

Keywords： Lipschitz nonlinear system     Dynamic output-feedback control     Event-triggered control     Global asymptotic stability    

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Study on realtime method of traffic flow guidance system

Cui Jianming,Ye Huaizhen

Strategic Study of CAE 2008, Volume 10, Issue 10,   Pages 64-66

Abstract:

Real-time guidance system of traffic flow is information reconstruct in unit time. If events occut in short periodic time, these events will inflict the normal traffic guidance. In this paper, a new and simple solution scheme is proposed by analyzing status traffic situation. In this plan, systematic revision for read-time guidance in burst event is added to deduce reaction time. This scheme is imporved technology built on the current guidance system, therefore, this conclusion can be widly applied to traffic flow guidance system.

Keywords： traffic flow guidance system     simulation     emergent events     real-time guidance    

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Event-triggered adaptive finite-time control for nonlinear systems under asymmetric time-varying state constraints Research Article

Yan Wei, Jun Luo, Huaicheng Yan, Yueying Wang,wyy676@126.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 12,   Pages 1551-1684 doi: 10.1631/FITEE.2000692

Abstract: This paper investigates the issue of event-triggered adaptive state-constrained control for multi-input multi-output uncertain nonlinear systems. To prevent asymmetric time-varying from being violated, a tan-type is established to transform the considered system into an equivalent “non-constrained” system. By employing a smooth switch function in the virtual control signals, the singularity in the traditional dynamic surface control can be avoided. Fuzzy logic systems are used to compensate for the unknown functions. A suitable event-triggering rule is introduced to determine when to transmit the control laws. Through Lyapunov analysis, the closed-loop system is proved to be semi-globally practical stable, and the are never violated. Simulations are provided to evaluate the effectiveness of the proposed approach.

Keywords： 事件触发控制；非线性映射；自适应模糊控制；有限时间；状态约束    

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Some proposals about promoting the construction of national emergency platform

Long Yu

Strategic Study of CAE 2009, Volume 11, Issue 9,   Pages 87-90

Abstract:

The promotion of national emergency platform on the construction is the technical basis to strengthen emergency management. At present, it is the core mission. In recent years, national emergency platform has made rapid progress.However, there are still some problems; this article raises a series of recommendations about ways to improve the construction of the national emergency platform on the basis of the comprehensive analysis.

Keywords： emergency platform     emergency management     emergencies     system construction    

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A novel color image encryption algorithm based on a fractional-order discrete chaotic neural network and DNA sequence operations Research Articles

Li-ping Chen, Hao Yin, Li-guo Yuan, António M. Lopes, J. A. Tenreiro Machado, Ran-chao Wu,lip_chenhut@126.com

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 6,   Pages 809-962 doi: 10.1631/FITEE.1900709

Abstract: A novel algorithm based on dynamic deoxyribonucleic acid (DNA) encoding and chaos is presented. A three-neuron fractional-order discrete Hopfield neural network (FODHNN) is employed as a pseudo-random chaotic sequence generator. Its initial value is obtained with the secret key generated by a five-parameter external key and a hash code of the plain image. The external key includes both the FODHNN discrete step size and order. The hash is computed with the SHA-2 function. This ensures a large secret key space and improves the algorithm sensitivity to the plain image. Furthermore, a new three-dimensional projection confusion method is proposed to scramble the pixels among red, green, and blue color components. DNA encoding and diffusion are used to diffuse the image information. Pseudo-random sequences generated by FODHNN are employed to determine the encoding rules for each pixel and to ensure the diversity of the encoding methods. Finally, confusion II and XOR are used to ensure the security of the encryption. Experimental results and the security analysis show that the proposed algorithm has better performance than those reported in the literature and can resist typical attacks.

Keywords： 分数阶离散系统；神经网络；DNA加密；彩色图像加密    

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Subspace-based identification of discrete time-delay system Article

Qiang LIU,Jia-chen MA

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 6,   Pages 566-575 doi: 10.1631/FITEE.1500358

Abstract: We investigate the identification problems of a class of linear stochastic time-delay systems with unknown delayed states in this study. A time-delay system is expressed as a delay differential equation with a single delay in the state vector. We first derive an equivalent linear time-invariant (LTI) system for the time-delay system using a state augmentation technique. Then a conventional subspace identification method is used to estimate augmented system matrices and Kalman state sequences up to a similarity transformation. To obtain a state-space model for the time-delay system, an alternate convex search (ACS) algorithm is presented to find a similarity transformation that takes the identified augmented system back to a form so that the time-delay system can be recovered. Finally, we reconstruct the Kalman state sequences based on the similarity transformation. The time-delay system matrices under the same state-space basis can be recovered from the Kalman state sequences and input-output data by solving two least squares problems. Numerical examples are to show the effectiveness of the proposed method.

Keywords： Identification problems     Time-delay systems     Subspace identification method     Alternate convex search     Least squares    

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Peacetime and Epidemic Combination Medical Materials Reserve System for Public Health Emergencies

Cai Jianping, Wang Jing

Strategic Study of CAE 2022, Volume 24, Issue 6,   Pages 107-115 doi: 10.15302/J-SSCAE-2022.07.005

Abstract:

 Establishing a medical materials reserve system that integrates normal time with emergencies is crucial for promoting the medical materials support ability and improving the emergency management system in China in case of public health emergencies. This study summarizes the development status of China's medical materials reserve system and analyzes its problems from three aspects: institutional development, supply capacity, and coordination mechanism. Moreover, it expounds on the necessity and urgency for building a medical materials reserve system that integrates normal time and emergencies and proposes a construction plan from three aspects: basic concept, framework, and operation mechanism. Furthermore, we suggest that China should improve its medical materials reserve policies and institutions, optimize the medical materials reserve system, perfect the operation mechanism, and establish a medical materials reserve information sharing platform.

Keywords： public health emergencies     medical materials reserve system     normal time and emergency combination     basic framework     operation mechanism    

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A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power Electronics Systems as Generalized Hybrid Systems Article

Bochen Shi, Zhengming Zhao, Yicheng Zhu, Zhujun Yu, Jiahe Ju

Engineering 2021, Volume 7, Issue 12,   Pages 1766-1777 doi: 10.1016/j.eng.2021.07.011

Abstract:

Modeling and simulation have emerged as an indispensable approach to create numerical experiment platforms and study engineering systems. However, the increasingly complicated systems that engineers face today dramatically challenge state-of-the-art modeling and simulation approaches. Such complicated systems, which are composed of not only continuous states but also discrete events, and which contain complex dynamics across multiple timescales, are defined as generalized hybrid systems (GHSs) in this paper. As a representative GHS, megawatt power electronics (MPE) systems have been largely integrated into the modern power grid, but MPE simulation remains a bottleneck due to its unacceptable time cost and poor convergence. To address this challenge, this paper proposes the numerical convex lens approach to achieve state-discretized modeling and simulation of GHSs. This approach transforms conventional time-discretized passive simulations designed for pure-continuous systems into state-discretized selective simulations designed for GHSs. When this approach was applied to a largescale MPE-based renewable energy system, a 1000-fold increase in simulation speed was achieved, in comparison with existing software. Furthermore, the proposed approach uniquely enables the switching transient simulation of a largescale megawatt system with high accuracy, compared with experimental results, and with no convergence concerns. The numerical convex lens approach leads to the highly efficient simulation of intricate GHSs across multiple timescales, and thus significantly extends engineers’ capability to study systems with numerical experiments.

Keywords： Generalized hybrid systems     Megawatt power electronics     Modeling and simulation     Numerical convex lens    

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Development Strategy for Intelligent Factory in Discrete Manufacturing

Lu Bingheng, Shao Xinyu , Zhang Jun, Wang Lei

Strategic Study of CAE 2018, Volume 20, Issue 4,   Pages 44-50 doi: 10.15302/J-SSCAE-2018.04.008

Abstract:

A new-generation intelligent manufacturing, characterized by the marriage of the next-generation artificial intelligence technology and advanced manufacturing industry, is emerging and becoming the core technology of the fourth industrial revolution. China’s manufacturing industry as a whole is big but not strong. The development of intelligent manufacturing can promote China’s manufacturing industry by improving both quality and efficiency, and ultimately, is the main path for the transformation and upgrading of China’s manufacturing industry. Intelligent production is a major component of intelligent manufacturing, while intelligent factory is the carrier for intelligent production. This paper focuses on the development strategy for smart factories in discrete manufacturing. First, the concept of intelligent factory is introduced, with its basic structure, information system architecture, and basic characteristics in discrete manufacturing discussed. Then, the key breakthrough directions and the implementation plan for intelligent factory are laid out. Finally, following suggestions are provided for policy makers to develop intelligent factory: ① actively support and guide the development of intelligent manufacturing through pilot and demonstration projects, and promote the formation of an ecological chain for intelligent manufacturing with regional advantages; ② encourage enterprises to build intelligent factories to construct technological competitive advantages and enhance economic benefits; ③ establish and improve the synergy mechanism for innovation; ④ highlight the Made-in-China capabilities for core technologies, key equipment components, and industrial software.

Keywords： intelligent manufacturing     intelligent factory     discrete manufacturing    

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Finite-time leader-follower consensus of a discrete-time system via sliding mode control Research Article

Ruizhuo SONG, Shi XING, Zhen XU

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 1057-1068 doi: 10.1631/FITEE.2100565

Abstract: In this study, we solve the problem of discrete-time second-order (MASs) under the constraints of external disturbances. First, a novel consensus scheme is designed using a novel theory. Our adaptive controller is designed using the traditional sliding mode reaching law, and its advantages are chatter reduction and invariance to disturbances. In addition, the stability is demonstrated by presenting a discrete Lyapunov function. Finally, simulation results are presented to prove the validity of our theoretical results.

Keywords： Finite-time     Leader-follower consensus     Adaptive sliding mode control     Multi-agent systems    

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Discrete fractional watermark technique Correspondence

Zai-rong Wang, Babak Shiri, Dumitru Baleanu,wangzr@njtc.edu.cn,shire_babak@yahoo.com,dumitru@cankaya.edu.tr

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 6,   Pages 809-962 doi: 10.1631/FITEE.2000133

Abstract: The fractional logistic map holds rich dynamics and is adopted to generate chaotic series. A image is then encrypted and inserted into the original images. Since the encryption image takes the fractional order within (0, 1], it increases the key space and becomes difficult to attack. This study provides a robust method in the protection of the copyright of hardware, images, and other electronic files.

Keywords： 离散分数阶微积分；图像加密；水印    

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Title Author Date Type Operation

Warehouse automation by logistic robotic networks: a cyber-physical control approach

Kai Cai,kai.cai@eng.osaka-cu.ac.jp

Journal Article

Application of direct adaptive fuzzy slidingmode control into a class of non-affine discrete nonlinear systems

Xiao-yu ZHANG

Journal Article

Containment control for heterogeneous nonlinear multi-agent systems under distributed event-triggered schemes

Ya-ni Sun, Wen-cheng Zou, Jian Guo, Zheng-rong Xiang,xiangzr@njust.edu.cn

Journal Article

Event-based H∞ control for piecewise-affine systems subject to actuator saturation

Yonghao Jiang, Wei Wu, Xuyang Lou, Zhengxian Jiang, Baotong Cui,y.h.jiang@foxmail.com,weiwu@jiangnan.edu.cn,Louxy@jiangnan.edu.cn

Journal Article

Event-triggered dynamic output-feedback control for a class of Lipschitz nonlinear systems

Zhiqian LIU, Xuyang LOU, Jiajia JIA

Journal Article

Study on realtime method of traffic flow guidance system

Cui Jianming,Ye Huaizhen

Journal Article

Event-triggered adaptive finite-time control for nonlinear systems under asymmetric time-varying state constraints

Yan Wei, Jun Luo, Huaicheng Yan, Yueying Wang,wyy676@126.com

Journal Article

Some proposals about promoting the construction of national emergency platform

Long Yu

Journal Article

A novel color image encryption algorithm based on a fractional-order discrete chaotic neural network and DNA sequence operations

Li-ping Chen, Hao Yin, Li-guo Yuan, António M. Lopes, J. A. Tenreiro Machado, Ran-chao Wu,lip_chenhut@126.com

Journal Article

Subspace-based identification of discrete time-delay system

Qiang LIU,Jia-chen MA

Journal Article

Peacetime and Epidemic Combination Medical Materials Reserve System for Public Health Emergencies

Cai Jianping, Wang Jing

Journal Article

A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power Electronics Systems as Generalized Hybrid Systems

Bochen Shi, Zhengming Zhao, Yicheng Zhu, Zhujun Yu, Jiahe Ju

Journal Article

Development Strategy for Intelligent Factory in Discrete Manufacturing

Lu Bingheng, Shao Xinyu , Zhang Jun, Wang Lei

Journal Article

Finite-time leader-follower consensus of a discrete-time system via sliding mode control

Ruizhuo SONG, Shi XING, Zhen XU

Journal Article

Discrete fractional watermark technique

Zai-rong Wang, Babak Shiri, Dumitru Baleanu,wangzr@njtc.edu.cn,shire_babak@yahoo.com,dumitru@cankaya.edu.tr

Journal Article