Paper Title
Mathematical Model and Control of Vertical Take-Off and Landing Unmanned Aerial Vehicle Aircraft

Abstract
Vertical Take Off and Landing Vehicles (VTOL) are the ones which can take off and land from the same place without need of long runway. This research presents the design and implementation of tricopter mode and aircraft mode for VTOL aircraft system. Firstly, the aircraft design is considered for VTOL mode. And then, the mathematical model of the VTOL aircraft is applied to test stability. In this research, the KK 2.1 flight controller is used for VTOL mode and aircraft mode. The first part is to develop the VTOL mode and the next part is the transition of VTOL mode to aircraft mode. This research gives brief idea about numerous types of VTOLs and their advantages over traditional aircrafts and insight to various types of tricopter and evaluates their configurations. The proposed solution would be a mix of a tricopter and a Fixed Wing Aircraft and will have the advantages of both Fixed Wing and Rotary Wing Aircrafts. A Fixed Wing VTOL aircraft can vertically take off and land like a rotary wing aircraft (multicomputer, tricopter, or helicopters). Additionally, in forward flight the main lift is generated by the airstream flowing over its wings which makes it more efficient than a rotary wing aircraft. Keywords - VTOL, UAV, Stability Check, Dynamic Control System, MATLAB, PID.