A three-dimensional path planning method based on the biogeography-based optimization algorithm is presented for high-speed rotorcraft unmanned aerial vehicle which has a maximum speed of 20 m/s. In this study. a novel exponential artificial potential field is used to prevent saturation. for its peculiarity of smoothness and boundness. https://parisnaturalfoodes.shop/product-category/charcoal-facial-detox-wash/