Abstract: Optimal control pilot modeling technique in frequency domain analysis is an effective methodology used to analytically evaluate the handling qualities of aircraft with fly by wire flight control systems in the approach and landing task. On the basis of pilot aircraft system response the interplay between pilot workload and system dynamics is exposed. The model based metric for pilot workload is the required pilot phase compensation. The closed loop bandwidth, high frequency open loop peak and steady state, root mean squared flight path error were recommended as the system performance measures. These criteria are well correlated with subjective pilot rating. When these techniques were applied to a fighter, the strong correlation was obtained between the analytical and simulation results.

Key words: pilot-aircr aft system, optimal contr ol model, approach a nd la nding task, handling quality