Shock and Vibration / 2016 / Article / Tab 1

Research Article

Experimental Study of Active Vibration Control of Planar 3-RRR Flexible Parallel Robots Mechanism

Table 1

PSD value of the first-order mode frequency.

PSD1PSD2PSD3

Uncontrolled 29.5820.6717.92
Scheme  1 27.37 (−7.47%)14.61 (−29.32%)10.34 (−42.3%)
Scheme  2 27.08 (−8.45%)20.65 (−0.1%)17.83 (−0.5%)
Scheme  3 29.6 (+0.06%) 14.14 (−31.59%)17.89 (−0.17%)
Scheme  4 29.44 (−0.47%)20.25 (−2.03%)10.16 (−43.3%)

Note: PSD1 is the PSD value of the vibration signal of sensor 1 with respect to the first-order mode frequency; PSD2 is the PSD value of the vibration signal of sensor 2 with respect to the first-order mode frequency; PSD3 is the PSD value of the vibration signal of sensor 3 with respect to the first-order mode frequency.

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