Simulation Research on FOG-SINS/Doppler Radar/Baro-altimeter Integrated Navigation for Helicopters

Though fiber optic gyroscope strapdown inertial navigation system (FOG-SINS)/Doppler radar/baro-altimeter integrated navigation system has been done some research in theory, the appropriate study of practice has not been done yet in China and there are still many problems need to be solved. This paper gives a new design of a low cost FOG-SINS/Doppler radar/baro-altimeter integrated navigation system according to the disadvantages of precision and independence of navigation for helicopters. The mathematical model and digital simulation were presented and a series of long endurance hardware-in-the-loop simulation tests were conducted in a land vehicle. The excellent result of the simulation tests indicates that the designed system is effective, it can satisfy the requirement of navigation for helicopters when the GPS is disabled.