搜索到51886篇“ SAMPLED“的相关文章
On Sampled-Data PI Control for Nonlinear Systems
2024年
This paper studies sampled-data proportional-integral(PI)control for a basic class of nonlinear uncertain systems.The authors claim that a process with the first-order dynamics can achieve zero steady-state error through a sampled-data PI controller whenever the sampling period Tsampling period T is given,the two parameters kp and ki of the sampled-data PI controller are apparently restricted by T,or the setpoint tracking error diverges.
XU ShuaiLI Chanying
关键词:UNCERTAINTIES
Pattern-Based Neural Control for Sampled-data Nonlinear Systems
In real-world industrial control processes, the inherent dynamics and parameters of the system frequently expe...
Qinchen YangFukai ZhangCong Wang
Global Sampled-data Stabilization for a Class of Inherently Nonlinear Systems under Sensor Attacks
In this paper,we address the security of inherently nonlinear systems against sensor deception attacks and con...
Shida YangPing Zhao
Sampled-Data Fuzzy Control for Nonlinear Markov Jumping Parabolic PDE Systems with Deception Attacks
This paper introduces a sampled-data fuzzy control(SDFC) for nonlinear parabolic partial differential equation...
Hao-Kun WangZi-Peng WangXuehua Yan
Stochastic sampled-data multi-objective control of active suspension systems for in-wheel motor driven electric vehicles
2024年
This paper addresses the sampled-data multi-objective active suspension control problem for an in-wheel motor driven electric vehicle subject to stochastic sampling periods and asynchronous premise variables.The focus is placed on the scenario that the dynamical state of the half-vehicle active suspension system is transmitted over an in-vehicle controller area network that only permits the transmission of sampled data packets.For this purpose,a stochastic sampling mechanism is developed such that the sampling periods can randomly switch among different values with certain mathematical probabilities.Then,an asynchronous fuzzy sampled-data controller,featuring distinct premise variables from the active suspension system,is constructed to eliminate the stringent requirement that the sampled-data controller has to share the same grades of membership.Furthermore,novel criteria for both stability analysis and controller design are derived in order to guarantee that the resultant closed-loop active suspension system is stochastically stable with simultaneous𝐻2 and𝐻∞performance requirements.Finally,the effectiveness of the proposed stochastic sampled-data multi-objective control method is verified via several numerical cases studies in both time domain and frequency domain under various road disturbance profiles.
Iftikhar AhmadXiaohua GeQing-Long Han
Cosmetic or Dietary Vegetable Oils Sampled in the Cameroonian Market May Not Expose Consumers to Lipid Oxidation Products Generating Oxidative Stress and Inflammation
2024年
Vegetable oils are a source of energy, essential fatty acids, antioxidants and fat-soluble vitamins useful for human health care and development. These oils also contribute to organoleptic quality of their products’ derivatives. However, their chemical and physical properties can be modified by the mode of their extraction, storage and distribution. These modifications might negatively affect the nutritional quality of the oils. The goals of this study were to: sample different vegetable oils for cosmetic or dietary use marketed in Cameroon, and verify purity and oxidation states of each kind of oil through determination of its acidity, iodine, peroxide, saponification, refractive indexes and the conformity of the labeling. The carotene content, the level of polar components and specific absorbance were also determined. As the result, six oils namely palm, palm kernel, coconut, black cumin, peanut and shea butter were collected. Apart from labeling, chemicals and physicals parameters analyzed were generally in accordance with the Cameroonian and Codex Alimentarius standard. This study suggests that vegetable oils sampled in the Cameroonian market may not expose consumers to lipid oxidation products generating pathological oxidative stress and inflammation. However, efforts in application of existing standard need to be done as far as labeling are concerned.
Ferdinand Kouoh ElomboErika Van DammeClara DelepineDavid DepraetereLudovic ChaveriatPaul Lunga KeilahNico Fréderic NjayouPatrick Martin
Non-fragile memory sampled-data LFC for semi-Markov jump interconnected multi-area power systems: A looped functional approach
The problem of memory sampled-data load frequency control(LFC) for semi-Markov jump interconnected multi-area ...
Yulong LiXiaoqing LiZhinan PengKaibo Shi
Synchronization of delayed neural networks via intermittent sampled-data control
The paper investigates the synchronization problem for time-delay neural networks via intermittent sampled-dat...
Ying YangJifei MiaoXinyu Mei
关键词:SYNCHRONIZATION
基于自抗扰采样控制的车辆转向跟踪
2024年
运用自抗扰采样控制策略研究四轮转向车辆的模型参考跟踪控制问题。设计一个采样数据驱动的扩展状态观测器来同时估计跟踪误差和侧风扰动,并基于估计跟踪误差和估计干扰构建自抗扰采样控制器。利用增广系统和输入延迟系统建模方法,并结合Lyapunov-Krasovskii泛函方法,得到采样周期依赖的H∞性能分析结果。进一步,运用锥补线性化技术提出优化控制设计算法,能够获得最小的H∞性能指标并实现控制器增益和观测器增益的协同设计。通过仿真结果验证,所提出的自抗扰采样控制方法通过前轮和后轮转向使得车辆的侧偏角和偏航角速度能够在数据采样环境下跟踪期望目标,而经典的基于干扰观测器的控制方法无法完成跟踪控制任务;所提控制方法相比于经典的比例控制降低95%的跟踪误差。
刘亚辉高子凡朱淑倩王庭瑞
关键词:四轮转向自抗扰控制采样控制鲁棒控制
考虑通信时滞的采样控制系统稳定性分析
2024年
为了研究带有通信时滞的采样控制系统的稳定性问题,首先,考虑采样区间的采样特性,构造一种依赖于采样区间最值的闭环泛函,在这种泛函中,泛函相关的矩阵不需要满足正定定义,且矩阵随着采样区间最值的变化而变化;然后,利用采样控制系统的动态信息以及定积分的分部积分法,提出一些含自由矩阵的零等式;再次,结合广义自由矩阵积分不等式,推导出采样控制系统带有通信时滞和无通信时滞的2个稳定性判据;最后,通过数值和实际仿真验证采样区间最值的闭环泛函方法的可靠性。研究结果表明:基于采样区间最值的双边闭环泛函能够使采样控制系统稳定性判断更优且更有效。
陈刚刘博林陈云邓琪王震
关键词:采样控制系统稳定性分析时滞LYAPUNOV-KRASOVSKII泛函

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