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Indx TechStyle

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Gaganyaan is only where we are still listening about some practical progress and news chatter.

Human spaceflight seems to be top priority due to tendency of political class to compare India with US/Russia/China as well as BJP's won electoral points in 2024 elections (since human spaceflight would take place in 2023).

Expect other projects at least to be on a slow burner if not cold bag till India sends humans into space.
 

Okabe Rintarou

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Posting another set of Slides , there is still a lot of slides resting in my lap, will upload few days later . dont be bored bros . let these slides be here , will be helpful someone someday .

View attachment 119280View attachment 119281View attachment 119282View attachment 119283View attachment 119284View attachment 119285View attachment 119286View attachment 119287View attachment 119288View attachment 119289
Looks like the size of the "ISRO/DRDO slides and research papers" folder in your laptop is larger than the size of the hen tie folder in my laptop.

Watch @35:15 , "drop in 50 millibar pressure in LH2 tank lead to GSLV-F10/GISAT-1 failure.
1:26:24 Wonder what capacity constraints are being mentioned here for the Al-alloy longeron fabrication through plate route.
1:26:35 ISRO blokes using Redmi phones and tabs. FFS. (Or maybe its dudes at Midhani?)
1:26:52 Had no idea that is how they made curved isogrid surfaces.
1:26:58 Damn. Never knew they make gridfins with Wire EDM.
1:27:20 Wth is a supercappatery? Supercapacitor + Battery. I keep learning new things everyday.
2:15:44 Made for Gganyaan VILS: VikTor In-Loop Simulator. Component softwares include:-
VikTor: Vikram processor simulator which allows making of onboard flight computer simulator. VikTor-based onboard flight computer simulators used by flight software designers.
SITARA: Vehicle flight simulator (desi-KSP)
adVISE: Interface software
VILS used for closed loop simulations between flight computer simulator (based on VikTor) and vehicle flight simulator (SITARA) with adVISE interfacing between SITARA and VikTor-based on-board computer simulator.
VILS can simulate a rocket flight of 20 minutes duration in just 3 minutes.
Good to see Vikram processor being used in Gaganyaan onboard flight computer.

2:20:45 Another new tech I learnt from this:-
Fiber Optics based Measurement Sensors (FOMS) used for strain and temperature measurement in launch vehicle structural health monitoring. First demonstrated in GSLV D5 (2014). Planned use in RLVs.
FOMS works by emitting white light that falls on Fiber Bragg Grating (FBG) sensors placed at various structural parts where strain or temperature are to be measured. Under normal state, each FBG reflects light at a particular wavelength. This wavelength changes when strain or change of temperature are applied on the FBG sensor. So the Optical Processing System notes the change in wavelength reflected and can know the strain or temperature reading of each FBG sensor.
Now the presentation was about POWER (Programmable Optical Wave Energy Reflector) which is a testing system used to simulate wavelength shift to the Optical Processing System for the System's test and evaluation before its put onboard a rocket. Wavelength shift can be simulated by either temperature changes on a FBG sensor, which would require the entire thing to be put in a thermal chamber which stabilizes at one temperature in 15 hours. Their approach is simpler, simulating strain on multiple FBG sensors of different center wavelength (wavelength reflected at zero strain) by using that setup they showed at 2:23:27. This reduces testing and evaluation time from 15 hours to 15 minutes (shouldn't it be more than that?). POWER seems like a no-brainer to me, but this FOMS tech is new to me. I was still stuck in traditional strain gauge era.


Hack-proof communication network, self-eating-rockets, vanishing-satellites: Isro working on disruptive future tech
The first quantum comm. experiment (QUESS) is to be launched on a PS4 stage piggyback. No idea which PSLV mission though.
 

sorcerer

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India working with over 6 countries for Human Spaceflight Gaganyaan, says Dr.K Sivan
Sidharth MP

3-4 minutes


India is working with more than six countries to achieve the Gaganyaan Human Spaceflight mission, which is a symbol of International Cooperation, said Dr. K. Sivan, Chairman, Indian Space Research Organization (ISRO).

 

Okabe Rintarou

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India working with over 6 countries for Human Spaceflight Gaganyaan, says Dr.K Sivan
Sidharth MP

3-4 minutes


India is working with more than six countries to achieve the Gaganyaan Human Spaceflight mission, which is a symbol of International Cooperation, said Dr. K. Sivan, Chairman, Indian Space Research Organization (ISRO).

Good to see ISRO talking about sustained human presence on Moon or Mars. Now only thing I am waiting for is them to start talking about a Fusion Drive. New ArF Lasers may make ICF drives possible. US Navy is already working on ArF fusion.
 

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