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69篇 您的检索式:作者名="Frank Lewis"
    题名 作者 年代 出处 被引量
1Adaptive dynamic programming for online solution of a zero-sum differential game显示文摘This paper will present an approximate/adaptive dynamic programming(ADP) algorithm,that uses the idea of integral reinforcement learning(IRL),to determine online the Nash equilibrium solution for the two-player zerosum differential game with linear dynamics and infinite horizon quadratic cost.The algorithm is built around an iterative method that has been developed in the control engineering community for solving the continuous-time game algebraic Riccati equation(CT-GARE),which underlies the game problem.We here show how the ADP techniques will enhance the capabilities of the offline method allowing an online solution without the requirement of complete knowledge of the system dynamics.The feasibility of the ADP scheme is demonstrated in simulation for a power system control application.The adaptation goal is the best control policy that will face in an optimal manner the highest load disturbance.Draguna VRABIE Frank LEWIS 2011控制理论与应用(英文版)2011,9,3:10
2尾座式无人飞行器鲁棒容错编队控制显示文摘针对尾座式无人飞行器编队在执行器故障、严重的非线性和耦合性、参数不确定性、外界扰动等影响下的容错控制问题进行了研究。提出了一种鲁棒容错编队控制方法来实现一群尾座式无人飞行器在执行器故障情况下的期望编队飞行。所构建的控制器由2部分组成:标称控制器和干扰补偿控制器。设计标称控制器使系统实现期望的控制性能,利用干扰补偿控制器抑制多种不确定性和执行器故障的影响。通过理论分析证明了系统的鲁棒稳定性,并通过数值仿真验证了算法的有效性。刘德元 刘昊 Frank L LEWIS 2021航空学报2021,42,2:3
3基于PCA-CMAC的设备性能退化评估(英文)显示文摘提出了一种用于设备性能退化评估的PCA-CMAC(主成分分析小脑模型节点控制器)模型.该模型利用PCA进行特征提取,去除多个传感器信号特征的冗余信息,并且减少CMAC的输入维数;利用CMAC的局部泛化能力定量地评估设备的性能退化.给出了模型的实现过程,并将模型应用于钻削过程刀具状态的评估,试验结果证明该模型能基于刀具的正常状态,对刀具的磨损状态进行定量的评估.分析了CMAC中泛化参数g和量化参数r对评估结果的影响,g越大,CMAC的泛化能力越好,但各退化状态之间的区别越不明显;r越小,各退化状态之间越容易区分,但所需的权存储空间越大.2个参数的基本选择原则是CMAC的权存储空间应尽量小,与此同时,各退化状态之间应容易区分.张蕾 曹其新 Jay Lee Frank L. Lewis 2005Journal of Southeast University(English Edition)2005,21,3:3
4Model reference adaptive impedance control for physical human-robot interaction显示文摘这份报纸基于模型引用论述一个新奇提高的人机器人的相互作用系统适应控制。介绍方法交付保证稳定性和任务性能并且让二控制环。一个机器人特定的内部环,是一个 neuroadaptive 控制器,在网上学习机器人动力学并且让机器人象一个规定阻抗模型一样反应。这个环不使用任务信息,包括没有规定轨道。一个任务特定的外部环考虑人的操作符动力学并且使规定机器人阻抗模特儿适应以便联合人机器人的系统为任务性能有理想的特征。这个图案基于模型参考适应控制,但是一种非标准的形式。网络结果是有扩充人的操作符提供人机器人的队的改进任务性能的两个适应阻抗特征和 assistive 输入的一个控制器。模拟在一项重复点对点的运动任务验证建议控制器的表演。一个 PR2 机器人上的实际试验性的实现进一步支持途径的有效性。Bakur ALQAUDI Hamidreza MODARES Isura RANATUNGA Shaikh M. TOUSIF Frank L. LEWIS Dan O. POPA 2016Control Theory and Technology2016,14,1:3
5遥操作机器人神经网络Smith预估控制(英文)显示文摘针对遥操作机器人通讯通道中存在的时延 ,提出了一种神经网络 Smith预估控制方法。控制系统适合于时延不变但未知的情况。控制系统包括主控制器和从系统两部分。从系统采用动态神经网络辨识机器人的动态模型 ,神经网络权重在线学习 ,用神经网络的输出对非线性系统进行局部非线性补偿 ,将非线性系统线性化。主系统针对线性化的从系统 ,采用 Smith预估控制解决时延问题并保证系统的性能品质。通过李雅普诺夫稳定理论保证了时延控制系统的稳定性。对两关节机器人的仿真结果说明了该方法的有效性。黄金泉 徐亮 Frank L Lewis 2001Transactions of Nanjing University of Aeronautics and Astronautics2001,18,1:3
6Consensus controller for multi-UAV navigation显示文摘Patrik KOLARIC Ci CHEN Ankur DALAL Frank L. LEWIS 2018Control Theory and Technology2018,16,2:3
7An Optical Pressure Sensor Based on MEMS显示文摘An optical fiber pressure sensor has been developed for the measurement in human body.The sensing element is possessed of a membrane structure,which is fabricated by micromachining.The fabrication process includes anisotropic wet etching on the silicon wafer.For the transmitting source and signal light,a multimode optical fiber 50/125 μm (core/clad)in diameter was used.The intensity of the light reflected back into the fiber varies with the membrane deflection,which is s function of pressure.The deflection of the membrane by applied pressure can be mathematically described.Tong Zhang Sheng Qiang Frank Lewis Yalin Wu Xiaozhu Chi 2006稀有金属材料与工程2006,35,A03:2
8基于强化学习的部分线性离散时间系统的最优输出调节显示文摘针对同时具有线性外部干扰与非线性不确定性下的离散时间部分线性系统的最优输出调节问题,提出了仅利用在线数据的基于强化学习的数据驱动控制方法.首先,该问题可拆分为一个受约束的静态优化问题和一个动态规划问题,第一个问题可以解出调节器方程的解.第二个问题可以确定出控制器的最优反馈增益.然后,运用小增益定理证明了存在非线性不确定性离散时间部分线性系统的最优输出调节问题的稳定性.针对传统的控制方法需要准确的系统模型参数用来解决这两个优化问题,提出了一种数据驱动离线策略更新算法,该算法仅使用在线数据找到动态规划问题的解.然后,基于动态规划问题的解,利用在线数据为静态优化问题提供了最优解.最后,仿真结果验证了该方法的有效性.庞文砚 范家璐 姜艺 LEWIS Frank Leroy 2022自动化学报2022,48,9:2
9Evolution in the Management of Hepatic Trauma: A 25-Year Perspective显示文摘J. David Richardson Glen A. Franklin James K. Lukan Eddy H. Carrillo David A. Spain Frank B. Miller Mark A. Wilson Hiram C. Polk Lewis M. Flint 2000Annals of Surgery2000,,3:2
10Deadzone compensation in motion control systems using neural networks 显示文摘Rastko R Selmic Frank L Lewis 2000IEEE Transactions on Automatic Control2000,45,4:1
11The singularities and dynamics of a Stewart platform manipulator显示文摘Kai Liu Frank Lewis Guy Lebret David Taylor 1993Journal of Intelligent & Robotic Systems1993,,3:1
12The Transition of Land to Urban Use显示文摘Richard J. Amott Frank D. Lewis 0,,01:1
13Operative Experience of Residents in US General Surgery Programs: A Gap Between Expectation and Experience显示文摘Richard H. Bell Thomas W. Biester Arnold Tabuenca Robert S. Rhodes Joseph B. Cofer L D. Britt Frank R. Lewis 2009Annals of Surgery2009,,5:1
14Right Ventricular Function and Failure: Report of a National Heart, Lung, and Blood Institute Working Group on Cellular and Molecular Mechanisms of Right Heart Failure显示文摘Norbert F. Voelkel Robert A. Quaife Leslie A. Leinwand Robyn J. Barst Michael D. McGoon Daniel R. Meldrum Jocelyn Dupuis Carlin S. Long Lewis J. Rubin Frank W. Smart Yuichiro J. Suzuki Mark Gladwin Elizabeth M. Denholm Dorothy B. Gail 2006Circulation2006,,17:1
15Neural-Network Approximation of Piecewise Continuous Functions 显示文摘Rastko R Selmic Frank L Lewis 2002IEEE Transactions on Neural Networks (S1045-9227)2002,30,4:1
16Distributed cooperative secondary control of microgrids using feedback linearization显示文摘Ali Bidram Ali Davoudi Frank L Lewis 2013IEEE Trans on Power Systems2013,28,3:1
17Issues on stability of ADP feedback controllers for dynamical systems 显示文摘BALAKRISHNAN S N DING Jie LEWIS Frank L 2008IEEE Transactions on Systems Man and Cyberneties Part B: Cybernetics2008,38,4:1
18Alcohol and Smoking as Risk Factors in an Epidemiology Study of Patients With Chronic Pancreatitis显示文摘Gregory A. Coté Dhiraj Yadav Adam Slivka Robert H. Hawes Michelle A. Anderson Frank R. Burton Randall E. Brand Peter A. Banks Michele D. Lewis James A. Disario Timothy B. Gardner Andres Gelrud Stephen T. Amann John Baillie Mary E. Money Michael O’Connell 2011Clinical Gastroenterology and Hepatology2011,,3:1
19Cancer procoagulant A:a factor X activating procoagnlant from malignant tissue 显示文摘Gordon SG Franks J J Lewis B 1975Thromb Res1975,6,:1
20Backstepping Approach for Controlling a Quadrotor Using Lagrange Form Dynamics显示文摘Abhijit Das Frank Lewis Kamesh Subbarao 2009Journal of Intelligent and Robotic Systems (-)2009,,1:1
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