| 摘要 |
PURPOSE:To compensate the cooperation between a specimen and a vibrator by providing a logarithm converter connected to an accleration amplitude setter, etc. at a target signal generating part and adding the signals of these converter and the signal generator to each other for conversion of exponent. CONSTITUTION:A target signal generating part 24 is provided with in addition to an acceleration amplitude setter 1 and a sine wave sweep oscillator 2, a pair of logarithm converters 1a for the acceleration and frequency signals sent from the setter 1 and the oscillator 2, a variable slope setter 1b for generated signals, an adder 1c and an exponent converter 1d. Then the setter 1 generates a fixed acceleration speed G0 which is converted into a logG0 by the converters 1a. At the same time, a frequency signal (f) sent from a transmitter 2 is also converted into a logf and furthermore into a Klogf by the setter 1b with addition of the adder 1c. Thus a signal 22 of G0f<k> is obtained through the converter 1d. Thus it is possible to produce vibrations of a fixed stroke, a fixed speed and a fixed acceleration by controlling the value of (k). |
