  Incremental Nonlinear Dynamic Inversion (INDI) control has attracted
increasing research attention for it retains the high-performance of NDI and
has enhanced robustness. However, when actual elements of the flight control
system and real-world phenomena (such as actuator dynamics, sensor noise, time
delay, etc.) are considered, the INDI control may have degraded performance or
even lose stability. This paper analyzed the stability and performance of an
incremental controller for a SISO linear plant based on transfer functions.
Besides, the theoretical analysis results are verified through numerical
evaluations for the incremental controller of the short-period aircraft model
using comprehensive metrics.
