Description and analyses of response of dynamic systems. Comparison of transfer functionwith frequency response and application on seismograph. Comparison with dynamic magnification of mechanical seismograph. Generalisation to the system of n-degrees. Achieve seismograph calibration skills and competency for using the seismograph by measuring the electromagnetic and broadband seismograph characteristics. Distinguishing seismograph types, and introduce the measurement of time as unavoidable factor in geophysical observations and measurements.
Seismograph as a measurement system. Characteristics of static and dynamic measurement systems (transfer function, frequency response function, poles and zeros). Mechanical seismograph (indicator equation, dynamic magnification, main parts, construction), electromechanical seismograph (dynamic characteristics, main parts, construction). Experimental measurement and frequency response estimation, broadband seismographs. Accelerographs. Time and GPS.
After completing the course of Seismometry, the student should be able to:
- Describe and analyze the responses (characteristics) of dynamical measurement systems,
- Determine the transfer function and frequency characteristics of the RC-circuit and seismographs using Laplace and Fourier transforms, and generalise findings to the n-degree system,
- Analyze the dynamical system using the poles and zeros of a transfer function,
- Assemble electromagnetic seismograph from components, and calibrate it for a number of frequencies,
- Calculate and graphically display the measured frequency response, and analyze the working range of the instrument.
- Derivation of the equations and analysis of examples.
- Assembling the instrument and measuring parameters following from derived equations.
- Graphical presentation of measured parameters and graph analyses.
- Lectures, discussion and derivation of the equations.
- Problem solving.
- Practical assembling the instruments under guidance.
- Making individual written report about measuring and results.
METHODS OF MONITORING AND VERIFICATION:
Solved homeworks, and written report. Oral exam.
TERMS FOR RECEIVING THE SIGNATURE:
Solved homework, completed practically measuring and positive written report on the measurement results and analysis.
- Scherbaum, F.: Of Poles and Zeros, Kluwer Academic Publishers, Dodrecht, Nederlands 1996.
- Šantić, A. Elektronička instrumentacija, Školska knjiga, Zagreb 1988
- Skoko, D.: Osnove teorije seizmografa, Institut za zemljotresno inženerstvo i inženerska seizmologija na Univerzitetot "Kiril i Metodij", Skopje 1981.