A Coupled Disturbance Analysis Method Using Dynamic Mass Measurement Techniques

Modelling and testing of a soft suspension design for a reaction/momentum wheel assembly

“…[19]. In general, the m s and m d are small enough to be ignored in the mass matrix of the flywheel in Eq.…”

“…Masterson et al [16][17][18] have conducted substantial research in the area of empirical and analytical reaction wheel disturbance models, and flywheel mass imbalances are considered to be the most significant, with an amplitude proportional to angular speed and a frequency equal to the rotation frequency (fundamental harmonic). Furthermore, Elias and Miller [19] have proposed a coupled disturbances analysis method using dynamic mass measurement techniques. Shigemune, Yoshiaki, and Masahito et al [20][21][22] have established a method to measure lower frequency disturbances induced by WAs, which are traditionally difficult to detect, and revealed that the inner dynamics of the WA closely relate to the disturbances.…”

“…Masterson et al [16][17][18] have analyzed the vibration data obtained from a Kistler 9253 A force/moment table, whose measurement precision is better than 0.01 N; Elias and Miller [19] tested the WA by fixing it on a six-axis JR3 Universal Force-Moment Sensor System. Shigemune, Yoshiaki, and Masahito [20][21][22] have tested the disturbances by an air-floating disturbance detector, and achieved a higher sensitivity of lower frequency disturbances, with a resolution less than 0.001 N for 0.1 Hz.…”

A stochastic methodology for predictions of the environment created by multiple microvibration sources

“…The current practice in the spacecraft structures' industry is to measure the excitation forces created by the source when rigidly mounted (blocked) on a rigid multi-axis dynamometric platform (Kistler table) [38,39], and then ap-ply them to the location where the source is mounted on the structure, adding a lumped inertia which represents the source [40,41,42,43]. This method clearly gives good results if the source's structure has resonance frequencies well beyond the frequency range of interest.…”

“…As the sources are dynamically coupled to the satellite [43,44,38], in order to determine their impact on the platform response, two aspects have to be considered:…”