用H_∞控制论方法识别地震前兆异常的初步探讨
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摘要
本文利用控制论方法,给出由地震引起的井水水位变化和地形变变化的数学模型,并设计反馈控制器使用干扰在H_∞的范数意义下达到最小或者使该系统稳定,由此所得到的输出反映了由地震引起的异常。作为例子,文中给出了用此方法得到的1976年7月28唐山7.8级地震前大灰厂短水准和汉沽双桥1号井水位短期前兆异常变化的清晰识别结果。
The H∞ optimization theory was introduced into the recognition of precursory anomalies in variations of underground water level and earth deformation before large earthquake.The mathematical models of the above-mentioned precursory anomalies are given.The corresponding method and algorithm of H∞ optimization theory are advanced. In illustration of method,the short-term precursory anomalies in short-range levelling of Dahuichang and in underground water level of Shuangqiao, Hangu before Tangshan earthquake(M=7. 8) in July,1976 were recognized clearly.
引文
1郑治真.地球物理信号处理的进展和今后方向.地球物理学进展。1992,7(2)2Francis,B.A..AcourseinH∞controlTheorySpringer-Verlag,Berlin,Heidelberg,NewYork,London,paris,Tokyo.198.3汪成民,车用太,万迪,董守玉.地下水微动态研究.北京:地震出版社,1988.4傅承义,陈运泰,祁贵仲.地球物理学基础.科学出版社,1985.5疏松桂等.计算机控制系统理论与应用,科学出版社,1989.6Ackcrmann,J.,Hu,H.ZandKeasbaue,D..Robustnessanalysis.Acasestudy,IEEETTransonAuto,Contr.,1990,352-365.

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