検定コイルを用いたサーボ形変位センサの実現

概要

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In the field of vibration control, the servo type acceleration sensors are widely used. For the measurement of seismic intensity and the vibration suppression control of bridge or high-rise building, the servo type velocity sensors are commonly utilized. In either case, the velocity sensor is convenient for the vibration control, because an integration operation is unnecessary to derive the velocity signal. Then, in order to improve the velocity sensor, the velocity sensor using the calibration coil was already proposed. In this paper, the displacement sensor using its coil is furthermore proposed. This sensor has the merit of simultaneous vibration detection. Namely, the acceleration, the velocity, and the displacement signals can be detected from the closed loop at the same time. Firstly, the principal control block diagram of displacement sensor is presented. Next, improved results for both the generated offset voltage and the excitation of high frequency dynamics are shown. Finally, the shaping condition of frequency response and results of parameter identification are experimentally shown. For impact test of structure, the acceleration, the velocity, and the displacement signals can be detected simultaneously.
公益社団法人精密工学会の論文
2007-03-05