Comprehensive review of various control strategies for quadrotor unmanned aerial vehicles

The Quadrotor Unmanned Aerial Vehicles (UAVs) have gained significant attention in recent years due to their versatile applications in civilian and military sectors. It is a highly nonlinear and underactuated system and an outdoor flight; it is always subjected to external disturbances due to wind gusts and other environmental factors. Implementing the control strategies could be improved in terms of high computational time, uncertainty, approximation error, and a large amount of training data. One of the major challenges in the development of quadrotors is the design of an efficient and reliable control system. This paper presents a comprehensive review of various control strategies for quadrotors and evaluates their performance. The review includes classical control techniques such as PID (Proportional-Integral-Derivative) and LQR (Linear Quadratic Regulator) and modern control strategies such as adaptive and fuzzy control. Comparative analysis of various control strategies has been presented with key challenges and future directions. This study provides a useful guide for researchers and engineers in the design of control systems for quadrotors.