Research Article
Numerical Investigation on Suppressing High Frequency Self-Excited Noises of Armature Assembly in a Torque Motor Using Ferrofluid
Table 3
Simulation results of dynamic characteristics of armature assembly.
| | Without ferrofluid | With ferrofluid | Amplitude dropped by | | Resonant frequency (Hz) | Resonant amplitude (μm) | Resonant frequency (Hz) | Resonant amplitude (μm) |
| | 590 | 320.02 | 590 | 66.35 | 79.27% | | 1125 | 149.22 | 1120 | 92.54 | 37.98% | | 2605 | 6.83 | 2610 | 5.81 | 14.93% | | 3725 | 7.08 | 3710 | 5.26 | 25.71% |
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