Perancangan dan Realisasi Kontrol Prototype Landing Gear System Menggunakan PLCmikro berbasis Mikrokontroller PIC16F877A

The landing gear system an aircraft wheel drive system that uses electromechanic system with a relay without any centralized control. Through this study, the electromechanic system was changed to landing gear system with a centrally controlled by using microcontroller and programmed with ldmikro ladder diagram language which came to be known by the name of "PLCmikro". Discreate input used to drive the actuator solenoid valve double acting cylinder so that the piston can work as desired system. The analog input is used as the minimum flight altitude information to keep the plane safe to fly in the air. Landing gear control system is realized successfully drive the piston in and out of the tube, providing information processes are problematic piston movement and wheel position that has entered or exited the plane in the form of LED lights. The system also successfully read the minimum altitude aircraft information of the potentiometer and turn it into information sounds and LED lights.