Title:
A Process to Obtain Robustness Metrics for Adaptive Flight Controllers
A Process to Obtain Robustness Metrics for Adaptive Flight Controllers
Author(s)
Kimbrell, Scott
Johnson, Eric N.
Chowdhary, Girish
Calise, Anthony J.
Chandramohan, Rajeev
Johnson, Eric N.
Chowdhary, Girish
Calise, Anthony J.
Chandramohan, Rajeev
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Abstract
This research effort seeks a process to draw parallels between the classical stability
metrics of gain and phase margins for classical linear control systems with stability margins
for adaptive controllers. The method uses a Monte Carlo simulation to yield stability
threshold results for the adaptive controller based on problem-specific performance metrics.
By fitting a linear controller's analytical robustness results to the adaptive stability data, the
gain and phase margin for the performance-fitting linear system are considered to be the
worst case equivalent gain and phase margin for the adaptive controller. This paper also
discusses some experiences successfully obtaining time delay margin in a flight test setting.
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Date Issued
2009-08
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Text
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Article