Asian Journal of Control最新文献

英文中文

Observer-based spatiotemporal event-triggered fuzzy resilient control for temperature profile of high-speed spacecraft 基于观测器的时空事件触发模糊弹性控制，用于控制高速航天器的温度曲线

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-24 DOI: 10.1002/asjc.3472

Qiyuan Zhang, Xiaona Song, Shuai Song

This article proposes an observer-based spatiotemporal event-triggered fuzzy resilient controller design method for the temperature profile across the fin of high-speed spacecraft. Initially, the considered nonlinear system is reconstructed via the Takagi–Sugeno fuzzy rule. Then, to simultaneously realize the observation and control of the spacecraft surface temperature, an observer-based point controller is proposed in terms of averaged measurements. In addition, taking the network congestion issue into consideration, a spatiotemporal event-triggered mechanism and a quantization method are adopted to reduce data transmission and enhance bandwidth utilization. Furthermore, to resist cyberattacks and actuator faults, a fuzzy resilient control strategy is designed to ensure the stability of the closed-loop system with

disturbance attenuation performance. Finally, simulation results for a cooling fin are presented to demonstrate the validity of the proposed method.

本文提出了一种基于观测器的时空事件触发模糊弹性控制器设计方法，用于设计高速航天器翅片上的温度曲线。首先，通过 Takagi-Sugeno 模糊规则对所考虑的非线性系统进行重构。然后，为了同时实现对航天器表面温度的观测和控制，提出了一种基于平均测量值的观测点控制器。此外，考虑到网络拥塞问题，还采用了时空事件触发机制和量化方法，以减少数据传输，提高带宽利用率。此外，为了抵御网络攻击和执行器故障，还设计了一种模糊弹性控制策略，以确保闭环系统的稳定性和干扰衰减性能。最后，介绍了冷却翅片的仿真结果，以证明所提方法的有效性。

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引用次数: 0

Adaptive event-triggered safety control for multiplayer mixed zero-sum game with partial inputs delay 具有部分输入延迟的多人混合零和博弈的自适应事件触发安全控制

IF 2.7 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-21 DOI: 10.1002/asjc.3450

Chunbin Qin, Zhongwei Zhang, Ziyang Shang, Dehua Zhang, Jishi Zhang

This paper proposes an adaptive safety control method applicable to a multiplayer mixed zero-sum (MZS) game of nonlinear systems with partial inputs delay. Firstly, a framework is introduced involving N players, where player 1 and player N form a zero-sum (ZS) game, and player 1 and players 2 to N-1 form nonzero-sum (NZS) games, with some players experiencing time delays. Subsequently, the system's value function is augmented with a control barrier function (CBF) to ensure that the system's state remains within a safe region. Secondly, to approximate Nash equilibrium solutions, the study employs adaptive dynamic programming (ADP) and utilizes a critic-only neural network (NN) to approximate optimal solutions. Diverging from traditional time-trigger methods, computational and communication load reduction is achieved by introducing a state-related event trigger condition. The stability of the system is then meticulously analyzed using the Lyapunov theorem. Finally, to validate the effectiveness of the proposed method, the study provides a simulation example demonstrating its performance. In summary, this research introduces an efficient adaptive safety control method for addressing multiplayer MZS games with partial inputs delay, incorporating CBFs, ADP, and state-related event triggering.

本文提出了一种自适应安全控制方法，适用于具有部分输入延迟的非线性系统的多人混合零和博弈（MZS）。首先，本文引入了一个涉及 N 个玩家的框架，其中玩家 1 和玩家 N 组成零和（ZS）博弈，玩家 1 和玩家 2 至 N-1 组成非零和（NZS）博弈，部分玩家会出现时间延迟。随后，用控制障碍函数（CBF）增强系统的价值函数，以确保系统状态保持在安全区域内。其次，为了逼近纳什均衡解，该研究采用了自适应动态编程（ADP），并利用纯批判神经网络（NN）来逼近最优解。与传统的时间触发方法不同，本研究通过引入与状态相关的事件触发条件来减少计算和通信负荷。然后，利用李雅普诺夫定理对系统的稳定性进行了细致分析。最后，为了验证所提方法的有效性，本研究提供了一个仿真实例来演示其性能。总之，本研究介绍了一种高效的自适应安全控制方法，该方法结合了 CBF、ADP 和状态相关事件触发，可用于处理具有部分输入延迟的多人 MZS 游戏。

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引用次数: 0

Composite finite‐time output voltage tracking control of energy storage inverters with mismatched multiple disturbances 具有不匹配多重干扰的储能逆变器的复合有限时间输出电压跟踪控制

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-18 DOI: 10.1002/asjc.3469

Saijin Huang, Guanjun Li, Xiangyu Wang, Haoyuan Li

This paper investigates the finite‐time output voltage tracking control problem of energy storage inverters. Multiple load conditions are simultaneously considered. To complete the tracking control task and enhance the power quality under different loads, a composite control scheme, which contains two parts, is proposed. In the first part, two finite‐time disturbance observers are established to estimate the mismatched multiple disturbances originating from load variations. In the second part, new integral‐type sliding‐mode surfaces embedding disturbance estimates and ‐axis couplings are designed, which not only feedforward compensate for the disturbances but also achieve decoupling. Based on the sliding‐mode surfaces, a composite controller is constructed. Compared with the existing results, the proposed controller is continuous and significantly reduces chattering. Moreover, with the novel decoupling strategy, the ‐axis coupling problem is solved precisely without generalizing the couplings as disturbances, which simplifies the observation task and further accelerates system convergence. Rigorous stability analysis is conducted to demonstrate the accomplishment of the finite‐time tracking task. Simulations and experiments are presented to validate the effects of the proposed control scheme.

本文研究了储能逆变器的有限时间输出电压跟踪控制问题。同时考虑了多种负载条件。为完成跟踪控制任务并提高不同负载下的电能质量，本文提出了一种包含两部分的复合控制方案。在第一部分中，建立了两个有限时间扰动观测器，以估计由负载变化引起的不匹配多重扰动。在第二部分中，设计了嵌入扰动估计和轴耦合的新型积分型滑模面，不仅能对扰动进行前馈补偿，还能实现解耦。在滑模面的基础上，构建了复合控制器。与现有结果相比，所提出的控制器是连续的，能显著减少颤振。此外，利用新颖的解耦策略，无需将耦合泛化为干扰，就能精确解决轴耦合问题，从而简化了观测任务，并进一步加快了系统收敛速度。为证明有限时间跟踪任务的完成，进行了严格的稳定性分析。仿真和实验验证了所提控制方案的效果。

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引用次数: 0

Disturbance attenuation for neutral descriptor semi‐Markovian jump systems with saturation nonlinearity and time delays 具有饱和非线性和时间延迟的中性描述符半马尔可夫跃迁系统的扰动衰减

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-17 DOI: 10.1002/asjc.3470

Saminathan Mohanapriya, Sangmoon Lee, Charles Selvaraj Antony Crispin Sweety, Rathinasamy Sakthivel

This article examines the construction of the tracking control as well as the disturbance attenuation for a class of neutral descriptor semi‐Markovian jump systems involving input time delays. On the basis of Matausek–Micic modified Smith prediction technique, a modified equivalent‐input‐disturbance and multiperiodic modified repetitive controller has been developed for obtaining the required results. In order to reject external disturbances actively, the modified equivalent‐input‐disturbance technique is utilized. To be more explicit, the modification of the Smith predictor block and integration of the transfer function provide accurate estimate, efficient attenuation of external disturbance and proper compensation for input time delays. While constructing the controller gain matrices, the specified matrix inequalities are solved concurrently. At last, the potential and applicability of the framed control law are illustrated through the simulated findings.

本文研究了一类涉及输入时间延迟的中性描述符半马尔可夫跃迁系统的跟踪控制和扰动衰减的构造。在 Matausek-Micic 修正 Smith 预测技术的基础上，开发了一种修正等效输入扰动和多周期修正重复控制器，以获得所需的结果。为了主动拒绝外部干扰，采用了修正的等效输入干扰技术。更明确地说，对史密斯预测块的修改和传递函数的整合提供了精确的估计、对外部干扰的有效衰减以及对输入时间延迟的适当补偿。在构建控制器增益矩阵的同时，还要解决指定的矩阵不等式。最后，通过模拟结果说明了框架控制法的潜力和适用性。

引用次数: 0

Dynamic event‐triggered fault identification for nonlinear systems via deterministic learning 通过确定性学习识别非线性系统的动态事件触发故障

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-12 DOI: 10.1002/asjc.3468

Chujian Zeng, Tianrui Chen, Si‐Zhe Chen, Qiuye Wu

In this paper, a fault identification strategy for nonlinear systems is proposed by combining the deterministic learning (DL)‐based adaptive high‐gain observer (AHGO) with a dynamic event‐triggered mechanism (DETM). The DL theory is utilized to satisfy the partial persistent excitation condition, while the AHGO is employed to estimate the system states and fault functions simultaneously. Two DETMs are adopted to reduce data transmission and computational burden. The inter‐event intervals of the considered event‐triggered mechanisms are proven to be positive, thus excluding the Zeno phenomenon. The novelty of this paper lies in that, through the special design of AHGO and event‐triggered conditions, the estimation errors can converge to zero with arbitrary precision. Meanwhile, by incorporating the estimated output error into the DETM design, it is demonstrated that the number of events can be adaptively adjusted based on the fault signal. Furthermore, the relationship between the observer gain and system performance, as well as the inter‐event interval, is revealed (The event‐triggered mechanisms design method that ensures exponential convergence of the observer). Finally, the effectiveness of the developed strategy is verified through a simulation example.

本文通过将基于确定性学习（DL）的自适应高增益观测器（AHGO）与动态事件触发机制（DETM）相结合，提出了一种非线性系统故障识别策略。DL 理论用于满足部分持续激励条件，而 AHGO 则用于同时估计系统状态和故障函数。采用两个 DETM 来减少数据传输和计算负担。所考虑的事件触发机制的事件间期被证明为正值，从而排除了芝诺现象。本文的新颖之处在于，通过对 AHGO 和事件触发条件的特殊设计，估计误差可以以任意精度收敛为零。同时，通过将估计输出误差纳入 DETM 设计，证明了事件数量可以根据故障信号进行自适应调整。此外，还揭示了观测器增益与系统性能以及事件间间隔之间的关系（确保观测器指数收敛的事件触发机制设计方法）。最后，通过一个仿真实例验证了所开发策略的有效性。

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引用次数: 0

H−/L∞ UIO‐based fault detection and isolation design in finite‐frequency domain for nonlinear systems 基于 H-/L∞ UIO 的非线性系统有限频域故障检测与隔离设计

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-12 DOI: 10.1002/asjc.3455

Sheng Gao, Wei Zhang, Bopi Jin, Siyuan Ma

The issue of fault detection and isolation design in the finite‐frequency domain for discrete‐time Lipschitz nonlinear systems subjected to actuator faults and disturbances is investigated. A bank of H−/L∞ unknown input observers (UIOs) is established using the generalized observer scheme to generate residuals that are insensitive to a specific actuator fault but sensitive to the other actuator faults. Furthermore, in the finite‐frequency domain, the H− and L∞ performance indices are simultaneously used to improve the fault detection sensitivity and attenuate the influence of disturbances on the residuals, respectively. The design conditions for the bank of H−/L∞ UIOs are derived from the generalized Kalman–Yakubovich–Popov lemma and converted into an optimization problem constrained by linear matrix inequalities to solve the design matrices more easily. To diagnose actuator faults, a fault detection and isolation scheme is established using the time‐varying threshold from the L∞ performance analysis. Finally, the effectiveness of the fault detection and isolation scheme using the bank of H−/L∞ UIOs is validated by the simulation of two examples.

本文研究了受执行器故障和干扰影响的离散时间 Lipschitz 非线性系统在有限频率域中的故障检测和隔离设计问题。利用广义观测器方案建立了一组 H-/L∞ 未知输入观测器 (UIO)，以产生对特定致动器故障不敏感但对其他致动器故障敏感的残差。此外，在有限频率域，同时使用 H- 和 L∞ 性能指数分别提高故障检测灵敏度和减弱干扰对残差的影响。根据广义卡尔曼-雅库博维奇-波波夫定理推导出了 H-/L∞ UIO 组的设计条件，并将其转化为受线性矩阵不等式约束的优化问题，从而更容易地求解设计矩阵。为了诊断执行器故障，利用 L∞ 性能分析中的时变阈值建立了故障检测和隔离方案。最后，通过两个实例的仿真验证了使用 H-/L∞ UIOs 组的故障检测和隔离方案的有效性。

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引用次数: 0

Dynamic event-triggered-based decentralized fault-tolerant control for interconnected nonlinear time-delay systems with unknown control directions 基于事件触发的动态分散容错控制，适用于控制方向未知的互联非线性时延系统

IF 2.7 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-11 DOI: 10.1002/asjc.3457

Qixia Shen, Wenshuai Lin, Liang Cao, Meng Zhao

The dynamic event-triggered decentralized adaptive fault-tolerant control strategy is designed for nonlinear interconnected systems with time delay and unknown control directions. The dynamic event-triggered control scheme where the threshold parameters related to measurement errors are dynamically adjusted by introducing adaptive laws into the control law appropriately increases the time interval for controller update. Then, the Nussbaum function and linear transformation are employed to handle the coupling problem caused by actuator faults and unknown control directions. Meanwhile, the Lyapunov–Krasovskii function is utilized to compensate the effect of time delay and guarantees that all closed-loop signals are bounded. The errors converge into bounded compact sets around the origin. The validity of the presented scheme is verified via a simulation example.

针对具有时间延迟和未知控制方向的非线性互连系统，设计了动态事件触发分散自适应容错控制策略。动态事件触发控制方案通过在控制法则中引入自适应法则来动态调整与测量误差相关的阈值参数，从而适当增加了控制器更新的时间间隔。然后，利用努斯鲍姆函数和线性变换来处理执行器故障和未知控制方向引起的耦合问题。同时，利用 Lyapunov-Krasovskii 函数补偿时间延迟的影响，并保证所有闭环信号都是有界的。误差收敛到原点周围的有界紧凑集。通过一个仿真实例验证了所提出方案的有效性。

引用次数: 0

Master–slaves synchronization of teleoperation systems with the Try‐Once‐Discard protocol under event‐triggered communication 在事件触发通信条件下，利用 "尝试-一次-丢弃 "协议实现远程操纵系统的主从同步

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-10 DOI: 10.1002/asjc.3458

Yuling Li, Chenxi Li, Jie Dong, Haijuan Wang

In this paper, a class of single‐master‐multiple‐slaves (SMMS) bilateral teleoperation systems with the limitation of communication bandwidth is investigated. The signals are exchanged between the master and the slaves through delayed communication. Besides, to avoid data collisions, the Try‐Once‐Discard (TOD) scheduling protocol is utilized to decide which slave gets the network access at each triggered instant. A control algorithm with the event‐triggered mechanism is proposed to ensure the master–slaves synchronization. Furthermore, the closed‐loop system's stability criterion associated with the controller gains, the varying time delays' bounds, and the maximum transmission interval is established on the basis of the Lyapunov–Krasovskii analysis. Finally, the presented algorithm's performance is demonstrated by the simulation and experiment results.

本文研究了一类受通信带宽限制的单主多从（SMMS）双边远程操纵系统。主站和从站之间通过延迟通信交换信号。此外，为了避免数据碰撞，还采用了 "尝试-一次-丢弃"（TOD）调度协议来决定哪个从站在每个触发瞬间获得网络访问权。为确保主从同步，还提出了一种具有事件触发机制的控制算法。此外，在 Lyapunov-Krasovskii 分析的基础上，建立了与控制器增益、变化时间延迟边界和最大传输间隔相关的闭环系统稳定性准则。最后，通过仿真和实验结果证明了所提出算法的性能。

引用次数: 0

Linear convergence of event‐triggered distributed optimization with metric subregularity condition 具有度量次规则性条件的事件触发分布式优化的线性收敛性

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-10 DOI: 10.1002/asjc.3467

Xin Yu, Songsong Cheng, Jianbin Qiu, Yuan Fan

This paper designs a continuous‐time algorithm with event‐triggered communication (ETC) for solving a class of distributed convex optimization problems with a metric subregularity condition. First, we develop an event‐triggered continuous‐time optimization algorithm to overcome the bandwidth limitation of multi‐agent systems. Besides, with the aid of Lyapunov theory, we prove that the distributed event‐triggered algorithm converges to the optimum set with an exact linear convergence rate, without the strongly convex condition. Moreover, we provide the discrete version of the continuous‐time algorithm and show its exact linear convergence rate. Finally, we give a comparison example to validate the effectiveness of the designed algorithm in communication resource saving.

本文设计了一种具有事件触发通信（ETC）的连续时间算法，用于解决一类具有度量次规则性条件的分布式凸优化问题。首先，我们开发了一种事件触发连续时间优化算法，以克服多代理系统的带宽限制。此外，借助李亚普诺夫理论，我们证明了分布式事件触发算法能以精确的线性收敛速率收敛到最优集，而无需强凸条件。此外，我们还提供了连续时间算法的离散版本，并展示了其精确的线性收敛率。最后，我们给出了一个比较实例，以验证所设计的算法在节省通信资源方面的有效性。

引用次数: 0

Fixed‐time adaptive event‐triggered fault‐tolerant control of nonlinear systems with actuator failures 具有执行器故障的非线性系统的固定时间自适应事件触发容错控制

IF 2.4 4区计算机科学 Q2 AUTOMATION & CONTROL SYSTEMS

Asian Journal of Control

Pub Date : 2024-07-10 DOI: 10.1002/asjc.3466

Qi Chen, Li‐Bing Wu, Ming Chen, Ming‐Rui Liu

The problem of fixed‐time adaptive event‐triggered fault‐tolerant control (FTC) is investigated for a class of nonlinear systems with actuator failures in this paper. Firstly, by utilizing back‐stepping algorithm and the fixed‐time stable criterion, a novel fixed‐time adaptive fault‐tolerant controller and parameter updated laws in forms of nonlinear differential equations are developed to counteract actuator faults and parameter uncertainties in fixed time. Then, the event‐triggered mechanism based on the relative threshold method is applied to the proposed control scheme to save network resources. Furthermore, by the Lyapunov stability theory, it can be proven that all the closed‐loop signals of system remain bounded, and the tracking error converges into a small neighborhood of the origin within fixed time interval. Finally, the simulation examples are shown to verify the feasibility and efficiency of the presented strategy.

本文针对一类有执行器故障的非线性系统，研究了固定时间自适应事件触发容错控制（FTC）问题。首先，通过利用后退步算法和固定时间稳定准则，以非线性微分方程的形式开发了一种新型固定时间自适应容错控制器和参数更新规律，以应对固定时间内的执行器故障和参数不确定性。然后，将基于相对阈值法的事件触发机制应用到所提出的控制方案中，以节省网络资源。此外，根据 Lyapunov 稳定性理论，可以证明系统的所有闭环信号都保持有界，跟踪误差在固定时间间隔内收敛到原点的一个小邻域。最后，通过仿真实例验证了所提出策略的可行性和效率。

引用次数: 0

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