How Do You Optimize a Rocket's Trajectory?
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- Опубликовано: 16 июн 2024
- Today I'm trying to optimize a launch trajectory (aka Gravity Turn). I build a somewhat realistic simulation of a rocket launch they try out thousands of possible gravity turns, may the best turn win!
Unfortunately, this ended up being more complicated than I expected, you have to consider aerodynamics at supersonic speeds and different angles of attack, the curvature of the earth, the changing mass of the rocket during burns and staging, and, of course, you need a turning strategy to optimize. While I didn't do a great job, I almost got the Saturn 1B to orbit which I consider an absolute win!
Scott Manley's Q&A video:
• Deep Space Questions E...
Outro Music: "Blast" from Bensound.com 
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Horizontal is my favourite shape 😍
2:36 *laugh's at Proton M*
Nice! Did you just ran a lot of combinations of turning rate and altitude or used something like a genetic algorithm?
Just combinations for now, I thought about finding the slope and optimizing from there but it seems like the efficiency jumps instead if changing smoothly so it could get stuck on a mediocre solution. A genetic approach may end up having the same problem, but it would run faster, especially with more variables.
Isn't the peak of coefficient of drag the same as Max-Q as the rocket is ascending picking up speed?
Not necessarily, q-max corresponds to maximum drag force. Coefficient of parasite drag is typically a strong function of Mach number for a rocket, where the Mach number at q-max is usually around supersonic. The maximum coefficient of drag happens at about Mach 1, so if q-max happens around Mach 2, coefficient of parasite drag is not actually at its maximum.
made something like this for ksp
Can’t believe you forgot the earth rotates 🙄
Ohmigahd your math is terrible. “Good enough for a RUclips video”? Have some respect for your audience and actually do the work
This was a several hour project I did as a break from job hunting which I turned into a short video because it’s my hobby. The video has 126 views, this program isn’t being used for anything or being seen by anyone. The math is correct, the model just lacks fidelity. Perfect models don’t exist they just have to be good enough. For this video that bar is basically zero because there are no stakes.
@@ConHathy you are doing a pretty good job, its so cool to see how all these stuffs gets involved in finding out the results......keep it up!
@@ConHathy For a quick solution, this is by no means bad. Rather, this is pretty good taking into account the amount of time you put into it. Im doing a senior design project for the reverse engineering of the SLS, and having done the high fidelity analysis with thrust profiling, changing mass, non-linear differential equations, etc., i can say its more work than i would wish on my worst enemies, considering I also had to find a way to iterate the code for different starting mass, which means a new kick angle each time.