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math.OC2021
Boundary Control and Estimation for Under-Balanced Drilling with Uncertain Reservoir Parameters
Timm Strecker, Ulf Jakob F. Aarsnes
In under-balanced drilling, the bottom-hole pressure is kept below pore pressure, causing pressure dependent influx of reservoir gas into the wellbore that makes the system unstabl…
math.OC2017★ 82 cited
Delay-robust control design for two heterodirectional linear coupled hyperbolic PDEs
Jean Auriol, Jakob Ulf, Philippe Martin +1
We detail in this article the necessity of a change of paradigm for the delay-robust control of systems composed of two linear first order hyperbolic equations. One must go back to…