  In this study, a distinct reconfigurable fault-tolerant flight control
strategy is addressed for mitigating one of the persistent safety-critical
issue, i.e. loss of control triggered by actuator faults. The attainable
acceleration set notion is taken a step further towards incremental attainable
acceleration set through a slight modification that enables instantaneous
controllability checks. The inner-loop gains are updated in case of a fault
using incremental attainable acceleration set and a tuning function, which is
in charge as a compensator of agility and robustness. Additionally, the
outer-loop gains are also such reconfigured that holding the bandwidth ratio of
the successive loops at a prudent level to ensure the closed-loop stability;
for this reason, an analytical outer-loop gain update law is derived based on
the inner-loop gains and bandwidth, actuator and command filter time constants.
Subsequently, the proposed architecture is assessed under a severe fault
scenario with a demanding maneuver mission. Noticeably, the proposed method
fulfills the expectations of stability and agility sufficiently, and surpasses
the fixed-gain approach.
