Monthly Report for Space Robotic FMS PreCommercialization Development Jul 31, 2019
Structure rebuilt. Testing over narrower frequency range to begin investigation of improved approach to exciting torsion measurement degree of freedom. Simulation of torsion mode Poisson effects begun.
Software SimulationTimes series model of torsion mode excitation for segment 1& 3 excitation is just beginning, in an attempt to understand how to optimize response.
Breadboard Manufacturingsomehow, during vacation period, structure was moved, and results have shifted. The structure was disassembled for inspection. Nothing seemed to be broken. Electronics of excitation was checked, because the level of sound generated during testing is reduced. The modes most influenced seem to be 3 rotation degrees of freedom. Reposition of cables has improved effect significantly, but not completely. It has been decided to proceed with swirl investigation on basis of 'modified' structure. Several modes have dropped in frequency by 20-50 Hz, but they seem fairly consistent even with several disengagement/re engagement of struts.
Phase shifts between rocking mode segment (1 & 3) has begun, in 5 degree increments.
Plans for August.
Continue testing with frequency range narrowed to 500-1500 Hz. Complete time simulation for torsion mode excitation.