地震环境虚拟现实系统的研制

英文篇名：The Exploiture of Earthquake Surroundings VR System
中文刊名：系统仿真学报
英文刊名：Acta Simulata Systematica Sinica
作者：沈毅力 ; 曹阳 ; 李天石
英文作者：SHEN Yi-li ; CAO Yang ; LI Tian-shi (Department of Machine-electronic Engineering ; Xi'an Jiaotong University ; Xi'an 710049 ; China)
中文关键词：虚拟现实 ; 电液伺服系统 ; LabVIEW平台 ; 自适应逆控制控制 ; LMS算法
英文关键词：virtual reality ; electro-hydraulic servo system ; LabVIEW platform ; adaptive inverse control ; LMS algorithms
出版日期：2002-11-20
机构：西安交通大学机械电子工程系,西安交通大学机械电子工程系,西安交通大学机械电子工程系西安710049 ,西安710049 ,西安710049
年：2002
期：11
出版单位：系统仿真学报

摘要

地震往往带给人类的是巨大的财产损失和触目惊心的灾难,本文设计了一个地震环境虚拟现实系统,通过它,可以使参与者熟悉地震的前兆、强震以及余震的相关知识,帮助大家在突然遭遇到地震时做出正确的判断并逃离危险。该地震环境虚拟现实系统由电液伺服系统驱动,辅以全息音响技术、舞台灯光装置,是一个集科教和娱乐于一体的大型综合系统,具有较高的动态特性及较大的驱动功率;它由一台工控机控制,控制软件在LabVIEW平台上编写,控制参数的调整灵活方便;采用模拟和数字双闭环控制,并对各主要参数进行实时监控,增强了系统的可靠性;采用自适应逆控制方法及LMS算法,使得系统的输出精确地跟踪系统的期望响应。
Earthquake always means large property loss and horrible disaster to human being. The paper brings out an earthquake surroundings VR system, through which people will be familiar with auspice of earthquake, strong shock and aftershock, and thus can make out right choices and get away from disaster. Consisting of an electro-hydraulic servo system, whole-information sound technology and some lighting device, it is a large scaled synthetical system that can be used in scientific study and entertainment. The system is of higher dynamics and drive power and is controlled by an industrial computer. The software is programmed based on LabVIEW and the system parameters can be easily modified. Furthermore, it is a double closed-loop system that includes a simulative closed-loop and a digital closed-loop, and its main parameters can be monitored in real time. So, the system is of higher reliability. The output signal is tracking desire signal exactly by using of adaptive inverse control method and LMS algorithms.

引文

[1]LymanR J,EdmonsonW W.Linear prediction of band limited processes with flat spectral densities[J].IEEE Transaction onSignalProcessing,2001,49(7):1564-1569.
    [2]WaxM.Order selection forAR models by predictive least squares[J].IEEE Transaction onSignalProcessing,1998,36(4):581-588.
    [3]KayS.EfficientGeneration ofColoredNoise[J].IEEE Proc.,1981,69(2):42-50.
    [4]黄浩华.电液伺服系统在地震工程研究中的应用[J].测控技术,1996,15(4).[5]WIDROW B,McCOOL J.A comparison of adaptive algorithms based on the methods of steepest descent and random search[J].IEEE Trans.OnAntennas andPropag.,1976,24(5):615-637.
    [6]WIDROW B,McCOOL J,MEDOFF B.AdaptiveControl byInverseModeling.[M] inConf.Rec. of12thAsilomarConferenceOnCircuits,Systems andComputers,SantaClara,CA,November1978, pp.90-94.
    [7](美)威德罗B,(以色列)瓦莱斯E著,刘树堂,韩崇昭译.自适应逆控制[M].西安:西安交通大学出版社,2000.
    [8](美)塞缪尔,D.斯特恩斯.数字信号分析[M].北京:人民邮电出版社,1980.
    [9]胡广书.数字信号处理[M].北京:清华大学出版社,1999.
    [10]刘永昌,高亚民,张伟林.地震模拟振动台微机迭代控制[J].地震工程与工程振动,1985,5(3).
    [11]戴诗亮.随机振动实验技术[M].北京:清华大学出版社,1984.
    [12]江进仁,洪峰.功率谱与反应谱的转换和人造地震波[J].地震工程与工程振动,1984,4(3).
    [13](美)贝达特J S,皮尔索A G.随机数据分析方法[M].国防工业出版社,1980.
    [14]杨立钦,顾岚.时间序列分析与动态数据建模[M].北京:北京理工大学出版社,1988.
    [15]刘成,王仲范.频域内汽车随机振动再现实验的方法[J].武汉汽车工业大学学报,1998,20(9).
    [16]朱昱,冯启民.相位差谱的分布特征和人造地震[J].地震工程和工程振动,1992,12(1).
    [17]翁震平,杨森华.16通道电液伺服控制海浪模拟造波装置[J].测控技术,1996,15(4).