Analysis of control quality of aircraft lateral motion during approach with the use of different control laws

Abstract

The article presents different methods of control of the lateral motion of aircraft during approach with the use of ILS‐LOC. Results of computer simulations are presented. An assessment of the quality with and without cross‐wind was made with the use of quality coefficients. The control laws are based on PID regulator and its modifications. Moreover, the application of the model‐following control in case of incomplete measurement, i.e. lack of information about the track angle, is presented. For interception, the model is used as the generator of the desired trajectory. The difference between the real and model trajectory is used for wind compensation, instead of the integration in LOC regulator. For control law synthesis for stabilization, linear quadratic regulator method was used.

The best control quality was obtained in the solution using information about the track angle and the solution using the model-following control.

First Published Online: 14 Oct 2010

Keyword : aircraft control systems, aircraft approach, PID, control quality, model-following control, LQR