Optimal aircraft control upset recovery with and without component failures

Enhancing UAV Survivability Through Damage Tolerant Control

“…Genetic algorithms 12 have been used to find the optimal recovery guidance law. Sparks et al 13 modify the guidance law to minimize altitude loss, showing that a Boeing 737-300 crash could have been prevented. These methods are computationally expensive and do not inherently prevent upsets.…”

Economic Model-Predictive Control Strategies for Aircraft Deep-stall Recovery with Stability Guarantees⋆

“…In this paper, we develop an MPC strategy to minimize loss-of-altitude using only the elevator η, i.e., thrust F = 0, in accordance with governmental procedures for manual recovery [30]. LOA is a crucial metric for both collision avoidance and operating envelope recovery post stabilization [11,12]. We will adopt the convention that the aircraft has recovered when it returns to a stable trim condition within the region of attraction of a nominal flight controller which subsequently reinstates level flight.…”

“…the stage cost . Proving this condition requires a suitable storage function Λ : X → R satisfying (11). With an analytical search for Λ being intractable in general, a polynomial storage function proving dissipativity can invariant subset ellipsoidal shape trim condition 0 actuator rate (°/s) be synthesized by solving a sum-of-squares feasibility problem.…”

“…Instead, we propose to use min-trace SOS programming to search simultaneously for a polynomial storagecandidate L and diagonal gains Q that directly prove the dissipativity condition (11), by solving the problem…”

“…In this paper, we propose a loss of altitude (LOA) minimizing economic model predictive control (EMPC) strategy for deep-stall recovery which we compare to linear and nonlinear tracking type MPC controllers. LOA is an important performance metric for upset recovery maneuvers and it can be exploited to enlarge the operational envelope during and after the maneuver, particularly at low altitudes [11,12]. The EMPC framework, see, e.g., [13] for an overview, allows for direct minimization of the LOA.…”