where [f.sub.act] is the active control force and [X.sub.a] is the vibration displacement of the ATMD mass block.
An ATMD was installed in one corner of the plane and a per-turbative stimulus was applied at the corresponding opposing corner.
Figure 14 shows the transfer function curve of the system after an ATMD has been mounted.
This paper presented a force feedback control method for ATMD. The results showed that this method can be used to achieve good vibration suppression.
Caption: FIGURE 14: Vibration attenuation effect of the ATMD.
Compared with general passive TMDs, active TMDs (ATMDs) offer advantages such as small mass, good control, and broader potential in applications.
All the control methods for ATMDs that are currently studied use for feedback kinematic parameter such as acceleration, velocity, and displacement, and the measurement of these parameters is performed mainly with acceleration sensors.
Figure 7 shows a comparison of the required active forces for three ATMDs of masses 0.5 kg, 1kg, and 2 kg in main system.
Figure 9 shows a comparison of the stroke of ATMDs with mass of 0.5 kg, 1kg, and 2 kg.
Figure 11 shows a similar comparison of the power consumption for three ATMDs but of different masses.
The following methods can be used to simulate how ATMDs respond when used in conjunction with main complex systems.
Caption: FIGURE 4: Vibration attenuation in the ATMDs with different frequencies.