检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

孤岛微电网固定时间分布式鲁棒二次控制

电力系统保护与控制 2024年第12期52卷 143-153页

作者：曹晓李泽崔国增苏州科技大学电子与信息工程学院江苏苏州215009

针对孤岛微电网实际运行过程中出现的未知外部扰动,提出了一种固定时间分布式鲁棒二次控制算法,实现了电网频率一致性控制,有效抑制了不确定干扰,提高了系统的鲁棒性能。首先,通过设计基于饱和函数的新型控制算法,有效地解决了现有控制... 详细信息

针对孤岛微电网实际运行过程中出现的未知外部扰动,提出了一种固定时间分布式鲁棒二次控制算法,实现了电网频率一致性控制,有效抑制了不确定干扰,提高了系统的鲁棒性能。首先,通过设计基于饱和函数的新型控制算法,有效地解决了现有控制器高频切换引发的抖动问题。同时确保二次控制能够在固定时间内达到稳定状态,且收敛时间上界不依赖于任何初始状态。然后,在设计控制算法的基础上,采用改进的分布式事件触发机制,在满足收敛速度和达到电网频率一致性的基础上减轻了通信负担,减少了控制器更新的频率,显著降低了通信资源的消耗,并排除了Zeno行为。最后,利用Matlab/Simulink仿真平台验证了所提控制算法的有效性。

关键词：孤岛微电网未知扰动固定时间一致性分布式事件触发机制 Zeno行为

维普期刊数据库博看期刊

Finite-time command filtered adaptive control for nonlinear systems via immersion and invariance

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2021年第9期64卷 151-164页

作者： Jinpeng YU Peng SHI Xinkai CHEN guozeng cui School of Automation Qingdao University School of Electrical and Electronic Engineering The University of Adelaide Department of Electronic and Information Systems Shibaura Institute of Technology School of Electronic and Information Engineering Suzhou University of Science and Technology

This paper investigates the problem of finite-time adaptive output tracking control for strictfeedback nonlinear systems with parametric uncertainties. Command signals and their derivatives are generated by a new command filter based on a second-order finite-time differentiator, which attenuates the chattering phenomenon. The parameter estimations are achieved by an immersion and invariance approach without requiring the certainty equivalence principle. The finite-time adaptive controller is constructed via a backstepping design method, a finite-time command filter, and a modified fractional-order error compensation mechanism. The proposed control strategy guarantees the finite-time boundedness of all signals in the closed-loop system, and the tracking error is driven into an arbitrarily small neighborhood of the origin in finite time. Finally, the new design technique is validated in a simulation example of the electromechanical system.

关键词： adaptive control finite-time control command-filtered backstepping immersion and invariance

机电伺服系统有限时间自适应反步控制方法研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

机床与液压 2024年第9期52卷 87-93,185页

作者：邱佳华李泽周成龙崔国增郝万君苏州科技大学电子与信息工程学院江苏苏州215000

机电伺服系统存在未建模动态及不可避免的未知扰动,会严重影响系统的伺服性能。针对未知扰动下机电伺服系统惯性负载的角位移跟踪控制问题,考虑未建模动态对系统的影响,提出一种基于有限时间的模糊自适应指令滤波反步控制方法,能有效补... 详细信息

机电伺服系统存在未建模动态及不可避免的未知扰动,会严重影响系统的伺服性能。针对未知扰动下机电伺服系统惯性负载的角位移跟踪控制问题,考虑未建模动态对系统的影响,提出一种基于有限时间的模糊自适应指令滤波反步控制方法,能有效补偿系统中的未知扰动和未建模动态,具有良好的惯性负载角位移跟踪控制效果。针对系统中存在的未知外部扰动及未建模动态,结合滤波反步法和模糊控制理论,使用模糊逻辑系统逼近未知非线性动态同时构造自适应控制器。考虑到微分计算带来的计算爆炸问题,构建有限时间指令滤波器,降低了系统的计算复杂度,并通过设计滤波误差补偿机制,对滤波误差项进行补偿,保证滤波信号的逼近能力,提升系统跟踪控制性能。通过稳定性分析,证明所设计的控制器能够保证系统的跟踪误差在有限时间内收敛。最后通过仿真实验,验证了所提控制方法的有效性。

关键词：机电伺服系统有限时间未建模动态反步法模糊控制

维普期刊数据库

Robust H∞ Filtering for Discrete-time Markovian Jump Systems with Time-varying Delay and Parametric Uncertainties

在线全文

学校读者我要写书评

暂无评论

Robust H∞ Filtering for Discrete-time Markovian Jump System...

Adaptive Practical Fixed-Time Control for a Class of Nonlinear Systems with Input Saturation

第三十九届中国控制会议

作者： Wenxiao Wang Shulan Kong guozeng cui School of Mathematics Science Qufu Normal University School of Electronic and Information Engineering Suzhou University of Science and Technology

In this paper, the problem of robust H∞ filtering for discrete-time Markovian jump systems with time-varying delay and norm-bounded parametric uncertainties is investigated. The parameter uncertainties in the systems satisfy a norm-bounded conditions, and the time-varying delay is unknown with given lower and upper bounds. A filter is designed in the presence of timevarying delay and parameter uncertainties. The filtering error system is proved to be stochastic bounded and satisfy correlative H∞ performance. Sufficient criteria are derived via constructing a novel delay-dependent Lyapunov-Krasonskii functional with convex hull and solving linear matrix inequalities（LM I）, which guarantee the filtering error system to be stochastic finite-time boundedness in H∞ sense.

关键词： H∞ filtering Nonhomogeneous Markovian jump systems Time-varying delay Uncertain systems

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Adaptive Practical Fixed-Time Control for a Class of Nonline...

多四旋翼无人机分布式固定时间自适应编队控制

第三十九届中国控制会议

作者： Wei Yang guozeng cui Ze Li Chongben Tao School of Electronic and Information Engineering Suzhou University of Science and Technology

In this paper, the problem of adaptive practical fixed-time control is investigated for a class of uncertain nonlinear systems with input saturation. A fixed-time command filter is introduced to solve the problem of "explosion of complexity", and the fractional order error compensation mechanism is used to eliminate the effect of filter error. To address the input saturation,a novel fixed-time auxiliary system is constructed. By combining the novel command filter and backstepping design method, a fixed-time state-feedback controller is designed. It is proved that the output tracking error converges to a region of zero within fixed time. A main advantage is that the convergence time is predefined without dependence on initial states. Finally, a numerical example is provided to show the effectiveness of the proposed control scheme.

关键词： Fixed-time control Adaptive control Command filtered backstepping Input saturation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

系统科学与数学 2022年第9期42卷 2245-2257页

作者：徐辉崔国增李泽苏州科技大学电子与信息工程学院苏州215009

针对具有外部扰动和参数不确定性的多四旋翼无人机,提出了基于指令滤波反步方法的分布式固定时间自适应编队控制算法.通过引入固定时间指令滤波及构建非光滑误差补偿机制,有效地避免了“复杂性爆炸”问题并在固定时间内移除了滤波误差... 详细信息

针对具有外部扰动和参数不确定性的多四旋翼无人机,提出了基于指令滤波反步方法的分布式固定时间自适应编队控制算法.通过引入固定时间指令滤波及构建非光滑误差补偿机制,有效地避免了“复杂性爆炸”问题并在固定时间内移除了滤波误差的影响.此外,通过设计分段函数,巧妙地解决了分布式控制器中存在的奇异性问题.利用固定时间稳定性理论,严格证明了闭环系统是实际固定时间稳定的,且闭环系统中所有信号有界,同时编队跟踪误差在固定时间内收敛到原点附近充分小的邻域内.最后,仿真算例验证了所提出的分布式固定时间控制策略的有效性.

关键词：多四旋翼无人机固定时间控制自适应控制分布式编队控制

维普期刊数据库

A review on numerical studies of airflow dynamics and particle deposition in human respiratory system Author links open overlay panel

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第8期91卷 351-377页

作者： Hao Jing Xinguang cui School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan430074China

Accurate assessment and prediction of airflow dynamics and particle deposition in the human respiratory tract are essential for human health,involving inhaled drugs for treating various diseases and toxic particles that can cause *** intricate process involves complex multiphase flow with distinct respiratory *** fluid dynamics(CFD)acts as a bridge,overcoming the limitations of in vivo and in vitro experiments and providing a means to fully comprehend and reveal the fundamental mechanisms of respiratory flow and particle behavior on a microscopic *** paper provides a comprehensive overview and concise summary of recent advancements in the numerical simulation of airflow and particle deposition in the human respiratory ***,it summarizes the transition of respiratory tract models from segmented models to emerging physiological characteristic models and whole-lung airway models,and the latest developments on the effects of key factors such as geometric variations,respiratory patterns,and particle physical/chemical properties on respiratory flow and particle deposition.A notable focus of this review is on emerging physiological characteristics models and their associated complex airflow and particle dynamics inside *** paper concludes with recommendations for future research to further advance the development of this field.

关键词： Airflow dynamics Particle deposition Human respiratory system Numerical modeling

Multi-Sensor Fusion Adaptive Estimation for Nonlinear Under-observed System with Multiplicative Noise

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第1期33卷 282-292页

作者： Yongpeng cui Xiaojun SUN School of Electronic Engineering Heilongjiang University Key Laboratory of Information Fusion Estimation and Detection

The adaptive fusion estimation problem was studied for the multi-sensor nonlinear under-observed systems with multiplicative noise. A one-step predictor with state update equations was designed for the virtual state with virtual noise first of all. An extended incremental Kalman filter(EIKF) was then proposed for the nonlinear under-observed systems. Furthermore, an adaptive filtering method was given for optimization. The fusion adaptive incremental Kalman filter weighted by scalar was finally proposed. The comparison analysis was made to verify the optimization of the state estimation using adaptive filtering method in the filtering process.

关键词： Adaptive systems Information filters Matrices Adaptive estimation Kalman filters State estimation Nonlinear systems

Number of Solitons Emerged in the Initial Profile of Shallow Water Using Convolutional Neural Networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第2期37卷 463-479页

作者： WANG Zhen cui Shikun School of Mathematical Sciences Dalian University of TechnologyDalian 116024China School of Mathematical Sciences Beihang UniversityBeijing 100191China

The soliton resolution conjecture proposes that the initial value problem can evolve into a dispersion part and a soliton ***,the problem of determining the number of solitons that form in a given initial profile remains unsolved,except for a few specific *** this paper,the authors use the deep learning method to predict the number of solitons in a given initial value of the Korteweg-de Vries(KdV)*** leveraging the analytical relationship between Asech^(2)(x)initial values and the number of solitons,the authors train a Convolutional Neural Network(CNN)that can accurately identify the soliton count from spatio-temporal *** trained neural network is capable of predicting the number of solitons with other given initial values without any additional *** extensive calculations,the authors demonstrate the effectiveness and high performance of the proposed method.

关键词： Convolutional neural network deep learning method KdV equation soliton

维普期刊数据库