Nonlinear Robust Control of a Hypersonic Flight Vehicle Using Fuzzy Disturbance Observer

Figure 5

Tracking results without and with total disturbance.

(a) 𝛼, 𝛽, and 𝛾 performance in tracking references without total disturbance

(b) 𝛼, 𝛽, and 𝛾 performance in tracking references with total disturbance