Synthetic Amplitude Spectrum for Analyzing Rotor´s Two Perpendicular Directional Vibration Displacement Signals

The classical amplitude spectrum and full amplitude spectrum have obvious defects in analyzing the rotor´s two perpendicular directional vibration displacement signals at a section. Classical amplitude spectrum is influenced by the installation angle of the sensors, and both classical amplitude spectrum and full amplitude spectrum can´t reflect the actual shaft vibration amplitude at every frequency. To solve these problems, this paper puts forward a method of synthetic amplitude spectrum (SAS). The paper discusses the principle of SAS, provides its specific doing steps. The experiments show that SAS and its extension methods are no longer influenced by the installation angle of two sensors, but guaranteeing that the solved amplitude of the spectrum can reflect the actual shaft vibration amplitude at its corresponding frequency.