Aerospace and Electronic Systems Magazine April 2018 - 12
Navigation and Control Architecture for Launch Vehicles
Figure 10.
Results of real-time NRHC on a preplanned trajectory, with sensor noise
vs. nominal condition.
ACTUATOR FAULTS AND DEGRADATION
In real life, actuators may not behave as expected. It may be that
the model is not entirely accurate or that the actuator has some
physical imperfections, resulting in differences between the commanded signal and the executed one. In that sense, actuator deg12
Figure 11.
Results of real-time NRHC on an on-the-fly trajectory, with sensor
noise vs. nominal condition.
radation is a real (and at high Mach numbers, crucial) issue that
affects many systems and their functionality. As stated in Liu [22]
and numerous other resources, such as [23]-[25], most actuator
malfunctions are due to overheating and mechanical component
wear, which does not generally occur in abrupt failures. Thus, this
robustness analysis investigates actuator degradation that happens
IEEE A&E SYSTEMS MAGAZINE
APRIL 2018
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