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.
出处
《地壳形变与地震》
CSCD
1995年第1期7-13,共7页
Crustal Deformation and Earthquake
基金
国家地震局八五攻关课题
关键词
控制论
地震前兆
异常判别法
Cybernetics,earthquake precursor,anomaly discriminance
