Deformation Analysis and Simulation of the Cup-Shaped Flexspline for Harmonic Drive Using in Aerocrafts

The harmonic gears used in servo drive systems of aerocrafts have the features of over loading and working for a short time. They are required to be smaller and lighter. Theoretical research and finite element analysis are given to the deformation characteristic of the flexible gear for the harmonic drive. This paper studies the initial deformation of the flexible gear, and compares with the result of finite element analysis. Overload is applied to the flexible gear, and by using ABAQUS FEA software, the distortions on the flexspline can be found. The research results provide theoretical references for improving load capacity of harmonic drive and designing this type of harmonic drive.