Design of feedback-controlled wide-band seismographs with respect to undesired side-effects |
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| Authors: | Christian Teupser Axel Plešinger |
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| Affiliation: | 1. Zentralinstitut für Physik der Erde, Akademie der Wissenschaften der D.D.R., Institutsteil Jena, DDR-69 Jena, German Democratic Republic;2. Geofyzikálni Ústav, ?eskoslovenská Adademie Ve?, Prague 4, Czechoslovakia |
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| Abstract: | Various modifications of a displacement-sensing seismometer controlled by negative first-order low-pass, first-order high-pass and second-order high-pass feedback are analysed. Undesired side-effects of the frequency-limited feedback on the response of the closed-loop system are investigated. Rules for “optimum tuning” of systems with a flat-displacement or flat-velocity response in a desired period range are given. |
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