The electro-hydraulic servo system was studied to cancel the amplitude attenuation and phase delay of its sinusoidal response,by developing a network using normalized least-mean-square (LMS) adaptive filtering algorit...The electro-hydraulic servo system was studied to cancel the amplitude attenuation and phase delay of its sinusoidal response,by developing a network using normalized least-mean-square (LMS) adaptive filtering algorithm.The command input was corrected by weights to generate the desired input for the algorithm,and the feedback was brought into the feedback correction,whose output was the weighted feedback.The weights of the normalized LMS adaptive filtering algorithm were updated on-line according to the estimation error between the desired input and the weighted feedback.Thus,the updated weights were copied to the input correction.The estimation error was forced to zero by the normalized LMS adaptive filtering algorithm such that the weighted feedback was equal to the desired input,making the feedback track the command.The above concept was used as a basis for the development of amplitude phase control.The method has good real-time performance without estimating the system model.The simulation and experiment results show that the proposed amplitude phase control can efficiently cancel the amplitude attenuation and phase delay with high precision.展开更多
1955年2月24日，假如那个名叫Steve Paul Jobs的男孩没有出生，55年后的世界会是什么模样？在他的领导下，苹果发展出计算机历史上第一套图形界面，让我们与电脑的互动从单调的命令输入，变为一个个可以点击的图标。尽管这项技术最后被...1955年2月24日，假如那个名叫Steve Paul Jobs的男孩没有出生，55年后的世界会是什么模样？在他的领导下，苹果发展出计算机历史上第一套图形界面，让我们与电脑的互动从单调的命令输入，变为一个个可以点击的图标。尽管这项技术最后被微软“拷贝”并发扬光大，却依旧无法掩盖天才的光辉。而在若干年后，当人们固执地认为鼠标和键盘是与电脑互动的最好工具时，苹果公司又将人类的手指直接引向了屏幕，进而挽救了濒危的平板电脑，并将传统笔记本电脑逼上了改革之路。展开更多
基金Project(50905037) supported by the National Natural Science Foundation of ChinaProject(20092304120014) supported by Specialized Research Fund for the Doctoral Program of Higher Education of China+2 种基金 Project(20100471021) supported by the China Postdoctoral Science Foundation Project(LBH-Q09134) supported by Heilongjiang Postdoctoral Science-Research Foundation,China Project (HEUFT09013) supported by the Foundation of Harbin Engineering University,China
文摘The electro-hydraulic servo system was studied to cancel the amplitude attenuation and phase delay of its sinusoidal response,by developing a network using normalized least-mean-square (LMS) adaptive filtering algorithm.The command input was corrected by weights to generate the desired input for the algorithm,and the feedback was brought into the feedback correction,whose output was the weighted feedback.The weights of the normalized LMS adaptive filtering algorithm were updated on-line according to the estimation error between the desired input and the weighted feedback.Thus,the updated weights were copied to the input correction.The estimation error was forced to zero by the normalized LMS adaptive filtering algorithm such that the weighted feedback was equal to the desired input,making the feedback track the command.The above concept was used as a basis for the development of amplitude phase control.The method has good real-time performance without estimating the system model.The simulation and experiment results show that the proposed amplitude phase control can efficiently cancel the amplitude attenuation and phase delay with high precision.
文摘1955年2月24日，假如那个名叫Steve Paul Jobs的男孩没有出生，55年后的世界会是什么模样？在他的领导下，苹果发展出计算机历史上第一套图形界面，让我们与电脑的互动从单调的命令输入，变为一个个可以点击的图标。尽管这项技术最后被微软“拷贝”并发扬光大，却依旧无法掩盖天才的光辉。而在若干年后，当人们固执地认为鼠标和键盘是与电脑互动的最好工具时，苹果公司又将人类的手指直接引向了屏幕，进而挽救了濒危的平板电脑，并将传统笔记本电脑逼上了改革之路。
