Add all bibliographic notes and zettels

content/zettels/active_damping.md

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+title = "Active Damping"
+author = ["Dehaeze Thomas"]
+draft = false
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+
+Tags
+:
+
+There are two main control architecture to actively damp structures:
+
+-   [Integral Force Feedback]({{< relref "integral_force_feedback.md" >}})
+-   [Direct Velocity Feedback]({{< relref "direct_velocity_feedback.md" >}})
+
+The idea is to apply a force proportional to the velocity (either relative or inertial) of the structure.
+
+These are usually applied in a collocated way, meaning that the actuator and sensors are collocated (fixed to the same DoF), in order to have guaranteed stability.
+
+
+## Bibliography {#bibliography}