Quantitative stability of quadrotor unmanned aerial vehicles

This article studies the quantitative stability of quadrotor unmanned aerial vehicles, by analyzing the dynamics model and dynamics stability at the stage of takeoff, landing and yawing, respectively. The dynamics stability problems, such as shaking, losing the tracking accuracy of command and out of control, and the design of structural parameters were investigated in detail. Dynamics stability reflects the dynamics characteristics of the whole systems, which is mainly affected by the structural parameters and control moment. The stability of system can be improved by optimizing structural parameters. The quantitative relationship between structural parameters and dynamics stability is based on the theory of Lyapunov exponent from the designing viewpoint of structural parameter, which aims at improving the reliability and stability of systems. The results indicate that the dynamics stability of systems can be promoted by optimizing the structural parameters of systems, which demonstrates the feasibility and effectiveness of this method.