Questions tagged [simulation]
representation of environment or process in a more accessible form using virtual or physical imitation or analogues, often for the purpose of training or testing, includes both real-world (physical) and numerical techniques.
14
questions with no upvoted or accepted answers
12
votes
0answers
179 views
Has NASA ever included a ground controller or astronaut becoming insane/irrational/belligerent in a training simulation?
NASA training simulations have included a wide variety of problems thrown at the pilots and ground controllers -- not only the typical technical failures, but also some unusual outside-world stuff ...
5
votes
0answers
405 views
Optimizing Suicide Burn
For a landing via suicide burn, I have identified three phases:
Starting at $t_0$, the craft approaches the ground with $v_x$ constant and $v_y$ gradually increasing (due to gravity)
At $t_b$, the ...
4
votes
0answers
345 views
How can I visualize orbits given Earth-centered, inertial (ECI) coordinates?
I'm using the SGP4 algorithm which outputs Earth-centered, inertial (ECI) satellite coordinates.
I found some software to visualize orbits, but they all request input as Keplerian elements.
How can ...
3
votes
0answers
60 views
Rocket Engine - Actuator in Loop Simulations
For Actuator-In-Loop simulations, why are the rocket engine nozzles along with the thrust vector control assembly (including the actuators) kept inverted on a platform like in the attached image or as ...
3
votes
0answers
184 views
Atmospheric Entry Simulation: Numerical Inaccuracy
I am trying to make an atmospheric entry/aero-assist simulation. For the propagator, I have used conventional equations of motions in planet fixed reference frame:
where the scalar states are- ...
2
votes
0answers
40 views
I want to simulate the antenna pointing error when tracking LEO satellites
I am trying to simulate the antenna pointing error of our antenna when tracking LEO satellites using TLE data. I am using the Skyfield library in python. First I loaded the TLE data from the Celestrak ...
2
votes
0answers
55 views
CesiumJS: Hayabusa 2 location w.r.t Earth
Given these coordinates w.r.t Sun:
Hayabusa:
x = 86014493
y = 112689997
z = 54295960
Earth:
x = 82241037
y = 112748971
z = 48876281
How do I calculate Hayabusa coordinates w.r.t Earth center?
I ...
2
votes
0answers
42 views
Why does Gravity Simulator's rendering of TESS' orbit look like a pretzel? How can I unpretzefy it?
Below is a screen shot from the amazing Gravity Simulator driven by our own @HappyKoala. If you haven't seen it recently go check it out now, then come back in 30 minutes and read the rest of my ...
2
votes
0answers
204 views
Is “Space Shuttle” written as a proper noun in the spaceflight industry?
Writing the question Was a real Space Shuttle ever used as a really big simulator? (and several others) I capitalize Space Shuttle because as far as I know, that's the actual name of NASA's spacecraft,...
2
votes
0answers
132 views
Recalculate Orbital Elements after a ĪV
I would like to write a program able to simulate a keplerian orbite given an initial position and velocity (r0, v0) and able to manage accelerations in different directions.
To simulate the orbit, I ...
2
votes
0answers
58 views
How to create a new reactant Ammonium Dinitramide NH4[N(NO2)] in NASA CEA?
Ammonium Dinitramide(ADN) is a compound used as a green propellant for spacecraft propulsion applications. ADN-blends like LMP103S and FLP-106 are currently under development. However, performing a ...
2
votes
0answers
129 views
How do you simulate the effects of microgravity on plants?
My team and I are working on planting in space. What equipment/techniques are used to simulate microgravity on earth for such experiments?
1
vote
0answers
95 views
What is wrong with my orbit sim equations? How can I fix them?
Edit:
Partial question: The object now moves in an ellipse like it's supposed to, but it orbits around a different point than I intend. How can I make it orbit around a particular object at a point?
...
1
vote
0answers
172 views
Cis-L2 Libration Point Halo Orbit
Queqiao became the first satellite to orbit the Cis-L2 libration point (far side of the moon). Link: https://en.wikipedia.org/wiki/Chang%27e_4
Does anyone have any insight on how to model this orbit ...
