Additive Manufacturing

Rejecting Fast Narrow-Band Disturbances With Slow Sensor Feedback for Quality Beam Steering in Selective Laser Sintering
A fundamental problem arises in feedback control when the system is subject to fast disturbances but can only get slowly updated sensor …
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An Inverse-Free Disturbance Observer for Adaptive Narrow-Band Disturbance Rejection With Application to Selective Laser Sintering
Selective laser sintering (SLS) is an additive manufactur- ing (AM) process that builds 3-dimensional (3D) parts by scan- ning a laser …
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Multi-band beyond-Nyquist Disturbance Rejection on a Galvanometer Scanner System
In many laser processing applications, galvanometer scanners are integrated to a larger system that creates external disturbances to …
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