期刊：
Proceedings of the 27th Chinese Control Conference, CCC,2008年:275-279
通讯作者：
Hu, Yaobin
作者机构：
[Hu, Yaobin; Zhang, Chunliang; Jiang, Yan] Univ S China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Hu, Yaobin] U;Univ S China, Sch Mech Engn, Hengyang 421001, Peoples R China.
会议名称：
27th Chinese Control Conference, CCC
会议时间：
July 16, 2008 - July 18, 2008
会议地点：
Kunming, Yunnan, China
关键词：
Light to frequency converter;Double element pyroelectric infrared sensor;Energy saving control device
摘要：
According to the relatively serious electrical energy waste of indoor electric lighting in domestic college classrooms and reading rooms and other larger rooms, this article put forward a novel energy saving control method by which lamps can be auto controlled based on indoor light illuminance and the number of people in the room, so as to realize the lighting on demand and achieve the energy saving purposes. The article expounded the principle and design of the indoor large area energy saving lighting control device, including hardware circuit design and software programming. The experimental results indicate the energy saving control device has good prospects on large area indoor energy saving lighting and is able to achieve significant economic benefits.
作者机构：
[张春良] School of Mechanical Engineering, Nanhua University, Hengyang 421001, China;[陈子辰; 梅德庆] Institute of Modern Manufacture Engineering, Zhejiang University, Hangzhou 310027, China
通讯机构：
School of Mechanical Engineering, Nanhua University, China
摘要：
加工过程在线控制是现代制造技术的一项高新技术,面向中小批量多品种生产的工序过程在线控制是现代加工过程工序控制的新发展,将通用图和相对公差结合用在 X 管理图在线控制之中可将控制界限的计算变得不复杂且不需做分隔更清晰地体现工序的相似性。本研究首先简单概括了基于通用图和基于相对公差的两种面向中小批量多品种 X 管理图的优点和不足,然后讨论了将通用图和相对公差结合的面向中小批量多品种的 X 管理图的计算
摘要：
ER fluid is an agile material, its viscosity and yield stress can be changed when exposed to an electric field. This feature provides simple, quiet, rapid response interfaces between electronic controls and mechanical systems. ER fluid dampers are relatively new semi-actives that utilize ER fluids to provide controllable damping forces. In this paper, following the introduction of the essential characteristics of ER fluids and ER fluid dampers, the theoretical model is presented to describe the ER fluid. A damper based on a shear model is designed to control a cutting chatter. The excitation test and cutting test are carried out to verify the damper's performance. The response of the ER fluid damper under different conditions is obtained. The results of the test show that ER fluid can well control the vibration and chatter.
摘要：
According to the properties of cutting chatter, a new chatter forecast system has been developed based on Hidden Markov Model (HMM) and Support Vector Machine (SVM). This system uses HMM as the recognition method and SVM as the prediction method. At the same time, means like wavelet package decomposition are also employed to extract the cutting features. The basic idea and general steps of this method are as follow. Firstly, the cutting signals are analyzed step by step in the same interval using wavelet packet decomposition. Secondly, the energy in every spectrum section are calculated and scaled in order to get general property. As a result, the energy distribution information and energy transition curve of different spectrum section can be retrieved. Then, SVR algorithm is applied to predict the trend of energy transition. The results, after scalar quantized, at last are input into HMMs to determine whether in chatter period. Certainly, current state still needs to be distinguished. The simulation results indicate that the new predicting method has good discriminating performances and high forecast accuracy.
会议名称：
Third International Symposium on Precision Mechanical Measurements
关键词：
ultra-precision machine tool;active vibration control;giant magnetostrictive actuator;H-infinity control
摘要：
A 6-degree-of-freedom microvibration isolation system for an ultra-precision machine tool has been developed. This system uses four air springs as passive vibration isolation elements and eight giant magnetostrictive actuators as active vibration isolation elements. Four vertical actuators and air springs are set in parallel to make use of the giant magnetostrictive actuators effectively. The displacement and velocity of the ultra-precision machine tool are chosen as the output feedback variables for the controller. The H(infinity) control approach is used to design the active vibration control system. Computer simulations and experiments are carried out to verify this system's microvibration control performance. The simulation and experimental results show that the developed active vibration control system has good isolation performance against the floor disturbance over wide frequency area.
期刊：
2005 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND BIOMIMETICS,2006年:427-+
通讯作者：
Li Guoping
作者机构：
[Li Guoping] Ningbo Univ, Fac Engn, Ningbo, Zhejiang, Peoples R China.;[Zhang Chunliang] Nanhua Univ, Coll Mech Engn, Hengyang, Hunan, Peoples R China.
通讯机构：
[Li Guoping] N;Ningbo Univ, Fac Engn, Ningbo, Zhejiang, Peoples R China.
关键词：
active vibration control;bionic mechanics;isolation platform;LQG
摘要：
Based on the bionics mechanics, a vibration isolation platform is developed. This system uses air springs and rubber layer as passive vibration isolation elements and giant magnetostrictive actuators as active vibration isolation elements. Actuators and air springs are arranged in parallel. The air springs and the rubber layer of the passive system are synthesized so as to minimize the root-mean-square values of amplitude of the isolation platform and the discrete time LQG controller based on a state space model is employed for controlling actuators. Simulation studies show that the developed active vibration control system has good isolation performance against the floor disturbance over wide frequency area. For random or white noise excitation, the amplitude of isolation platform is reduced to approximately 15% by the active control system.
