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Simulation 2. (a) Platform Accelerometer Record: the peak appears at a vibration frequency of 50 Hz. (b) Stretch Sensor Record: the sensor stretches two times during a complete vibration cycle, once during the upward movement and once during the downward movement. (c) Stretch Sensor Record (Rectified): the cumulative frequency of the upward and downward stretches was 100 Hz. (d) SEMG Record: the rectified SEMG; the vertical arrows separate the vibration cycles in the time domain traces.
