Research on information fusion method of altitude sensors of UAV
Yu Yu Ji · Electronic Design Engineering · 2014
Altitude information of high precision is important to the safety of UAV flight when UAV flies at low altitude of foothills. In order to research the information fusion method of altitude sensors based on complementary filter network, the paper focuses on the error characteristic of altitude measured by barometric and radio altimeter and analyzes the theoretical foundation of complementary filter.Then the time constant of complementary filter network is designed and an algorithm of complementary filter in discrete domain is proposed. Nonlinear simulation and flight test on UAV proved that designed filter satisfied the request of low altitude flight in foothills.