LDM

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@davidparrot4669 8 ай бұрын

merci michel , les gyros sont vraiment des appareils geniaux , leur conception m'epate toujours , un grand merci pour le partage c'est a chaque fois un vrais plaisir.

@wolpumba4099 5 ай бұрын

*LDM **#363**: Atlas Launcher Gyro Part 2: Synchros and Spinning Test - A Deep Dive into the Inner Workings* * *0:04** Outer Gimbal Synchro Test:* Michel demonstrates the functionality of the outer gimbal's synchro (resolver) by applying an AC voltage and observing the voltage change on the oscilloscope based on gimbal position, showcasing its role in position sensing. * *1:04** Inner Gimbal Synchro Test:* The inner gimbal synchro is tested similarly, revealing a unique parallel connection between the stators of the inner and outer gimbals, suggesting a coordinated zeroing mechanism for both axes. * *2:01** Slip Ring Contact Pinout:* A comprehensive explanation of the slip ring contact pinout is provided, detailing connections for the torque motor, synchros, and AC motor, highlighting the unusual parallel configuration of the synchros. * *3:04** Synchro Zeroing Mechanism:* Michel hypothesizes that the parallel synchro arrangement allows the system to seek a zero position for both gimbals simultaneously, using torque motor adjustments to correct any positional errors. * *4:35** Absence of Gravity Sensors:* Notably, this gyro lacks the typical gravity sensors found in standard avionic gyros, raising questions about its specific application and design considerations. * *4:50** Gyro Rotor Spinning Test:* Before spinning the gyro rotor, Michel identifies a smaller than expected capacitor (27nF) in the AC motor circuit. He adds a 270nF capacitor in parallel, based on his experience and the discovery of a similar capacitor in a second gyro unit. [From Comments] One commenter suggests the gimbals might be hollow magnesium alloy filled with gas for buoyancy. * *5:44** Successful Spin Test:* The gyro rotor spins successfully after the capacitor adjustment, although with noticeable noise at full speed. [From Comments] The audio in the video is noted to be unbalanced, potentially affecting the perceived noise level. I used gemini-1.5-pro-exp-0801 to summarize the transcript. Cost (if I didn't use the free tier): $0.05 Input tokens: 12873 Output tokens: 459

@jb5631 8 ай бұрын

Thank you as always for your fantastic work! The sound seems a bit weird though, like one audio channel is very low / not properly balanced.

@lelabodemichel5162 8 ай бұрын

Sorry for that, the camera with macro lens was very close to the gyro during the recording and I use my PC in mono only so I cannot check the sound balance. I have to invest in PC speakers!

@jeromeprater183 8 ай бұрын

I have torn down a similar version of this gyro back in the 1980's. I believe the gimbals are a hollowed out Magnesium alloy with a sealed gas plenum to facilitate buoyancy. The floatation fluid is likely a Hydrofluorocarbon of a high density.