Abstract:

According to flight test data and pilot flying experience, a frequency domain pilot model is developed with its parameters varying through the approach and landing task. The DFBWaircraft closed-loop pilot / vehicle model is formulated in this paper. The nonlinear time domain computer numerical simulation gives a quantitative analysis of aircraft longitudinal landing dynamic characteristics. The simulation result agrees well with the flight test of MCS aircraft. Thus the accuracy of both mathematical models and simulation computer programs is validated. Many beneficial results are obtained which show that the landing dynamics of some types of DFBW aircraft are acceptable.

Key words: Closed-loop pilot vehicle system, Digital fly-by-wire control sysytem. Pilot model