CHEN, W-H., 2003. Nonlinear disturbance observer enhanced dynamic inversion control of missiles. Journal of Guidance, Control and Dynamics, 26 (1), pp.161-166.
Nonlinear dynamic inversion control (NDIC) is one of the
most promising nonlinear control methods in aerospace engineering.
For longitudinal dynamics of a missile, this paper
proposes a nonlinear disturbance observer based approach
to enhance its disturbance attenuation ability and
performance robustness against uncertain aerodynamic coefficients.
Stability of the proposed nonlinear disturbance
observer enhanced NDIC is established. Its flexibility and
efficiency are demonstrated by two different choices of the
nonlinear gain function in the observer. Simulation results
show that the nonlinear disturbance observer based
technique can significantly improve disturbance attenuation
ability and performance robustness of dynamic inversion