Study of an Instrument Landing System

Abstract

The rapid increase in aviation industry requires parallel effective plans, programs and designs of systems and facilities nationwide to fulfill the increasing needs for safe air transportation. Aircraft landing remains a problem for a long time all over the world. Systems that aircraft rely on in landing are unreliable to perform a precise guidance due to many limitations such as inaccuracy, unreliability and dependency. In low visibility conditions, when pilots are unable to see the runway, the aircrafts are diverted to another airport. However, low visibility can also affect all airports in the vicinity, forcing aircrafts to land in low visibility conditions depending on Instrument Flight Rules (IFR). Aircraft approach and landing are the most hazardous portions of flight; accidents records indicate that approximately 50 percent of the accidents occur during aircraft landing.in order to limitation this accident all A/C provided by automatic landing systems. In this work, the concepts of automatic landing systems are studied, and a well-known method is focused on. This method is the Instrument Landing System (ILS). The detailed block diagram of this system is presented and discussed. This block diagram further is mapped to Matlab/Simulink suitable library blocks to generate the useful functions done by the subsystems of ILS. A simulation experiments are run and the performance is shown in terms of graphs. And also circuit had been designed by Proteus software, and the code of this simulation done by Micro C program.