Low Frequency Chatter Suppression using an Inertial Actuator

Aitor Bilbao-Guillerna (1) , Ion Azpeitia (1) , Stanislas Luyckx (2) , Nicolas Loix (2) , Jokin Munoa (1)

1 IK4-Ideko
2 Micromega Dynamics S.A.

It is well known that inertial actuators can remove regenerative chatter in many milling processes. They are useful when active control techniques are needed and the use of passive dampers is not enough. Moreover, complex control laws can easily be implemented leading to large improvements. However, the main limitation of inertial actuators is that they can only be used in a particular range of frequencies. This limitation is due to a low frequency suspension mode, which only allows the actuator to work at larger frequencies than this suspension mode. This is an important drawback in many big milling machines where chatter appears close to this low frequency. This paper deals with this problem and shows a possible solution to avoid this limitation from a control point of view. Some real milling tests will be presented showing the usefulness of the technique.

Mots clés: Active damping; Chatter; Inertial actuator

Domaines: Génie mécanique [physics.class-ph]; Génie mécanique [physics.class-ph]

Aitor Bilbao-Guillerna, Ion Azpeitia, Stanislas Luyckx, Nicolas Loix, Jokin Munoa. Low Frequency Chatter Suppression using an Inertial Actuator. International Conference on High Speed Machining, Mar 2012, San Sebastian, Spain. pp.1-6. ⟨hal-00976980⟩