Parafoil air-dropped control with fixed set-point based on interval type II fuzzy logic

Nowadays, the rescue material was air-dropped to a set point exactly with parafoil was a key technology in a disaster or an emergency situation. With this background, a control method was proposed based on the interval type II fuzzy logic, which was according to the parafoil dynamical model with six degrees-of-freedom and combined with the cross track error, also, a new parameter was defined which was used to measure the control precision. The proposed method in this research was used to control the parafoil that air dropped to a fixed set-point. A certain point in the parallel plane was set as the air-dropped target of the parafoil. The inputs of the fuzzy controller were the cross track error and the variation of the error. The outputs were the synchronous control of the left and right motors of the parafoil. Various experiment results verified that the parafoil can be exactly controlled to reach the fixed set point from the different original position with different projection angles.