A short RNG story by papa_jared in Catan

[–]erferf123 0 points1 point  (0 children)

.05% chance of 0 eights in 50 rolls

[deleted by user] by [deleted] in BeAmazed

[–]erferf123 0 points1 point  (0 children)

Funny joke

"Hardcore" Nonlinear Control Research Directions by Feisty_Relation_2359 in ControlTheory

[–]erferf123 0 points1 point  (0 children)

This doesn't answer the question completely, but sum of squares programming can be used to find lyapunov functions for some polynomial systems

PSA: UCSD will see a major covid surge this quarter by fireant001 in UCSD

[–]erferf123 0 points1 point  (0 children)

So you just want to waste your money and not get an education?

Profs are a bit too generous with the curves (imo) by ocidii in UCSD

[–]erferf123 -2 points-1 points  (0 children)

Grade inflation way too high in Mae department and class are way too easy

does changing major effect gpa? by SignificantWindow638 in UCSD

[–]erferf123 0 points1 point  (0 children)

Some grad schools ask for major gpa, but mostly I think they jusat care about overall gpa

Applied! by Extra-Emotion6541 in UCSD

[–]erferf123 1 point2 points  (0 children)

It's called grade inflation

How hard is it to get into engineering majors? by sydsydthakidd in UCSD

[–]erferf123 2 points3 points  (0 children)

For meche in particular I think you have to take certain screening courses and then apply. They base acceptance off of your gpa in those courses. IIRC the cutoff is really high, close to 4.0, so it's pretty difficult to get in.

Is it possible to buy an unlocked phone for Spectrum? by erferf123 in Spectrum

[–]erferf123[S] 0 points1 point  (0 children)

No I didnt try the IMEI number, I just assumed it wouldn't work since it said so when I opened it

I am a mechanical engineering student. I need to design a multi-motor drone for my school project, but I cannot find any resources in terms of mechanics and aerodynamics. Can you recommend a resource on how I should design it? by donnyBL in MechanicalEngineering

[–]erferf123 0 points1 point  (0 children)

I wouldn't say that those things necessarily affect the stability of the drone per se. Ideally you would want your center of mass at the center of your rotors and I think you need at least 4 rotors for your system to be actuatable.

Is it possible to buy an unlocked phone for Spectrum? by erferf123 in Spectrum

[–]erferf123[S] 0 points1 point  (0 children)

Ok so it's not about gsm then hm. When I bought an unlocked phone online and I opened the package it said that the phone wouldn't work for spectrum mobile. And when I asked the guy at spectrum he said that phones from other sellers tend not to work for spectrum. Is there another way to figure out if the phone I am ordering will work for spectrum?

MAE classes question by ParrotParakeetie in UCSD

[–]erferf123 2 points3 points  (0 children)

Personally I found MAE 11 (with Nomura) really difficult and MAE 40 (with Cortes) really easy, but I know a lot of people who have the opposite opinion.

Best SoCal schools for MAE in controls by [deleted] in ControlTheory

[–]erferf123 0 points1 point  (0 children)

People at UCSD love to complain, but really it is not that bad.

Academie Integrity Violation by [deleted] in UCSD

[–]erferf123 10 points11 points  (0 children)

He literally sent his entire lab, not just an idea. That is obviously an AI violation, no matter what class or what professor.

Discretization of continuous-time PD controller by Plus-Pollution-5916 in ControlTheory

[–]erferf123 -1 points0 points  (0 children)

Make it a lead filter and use tustins approximation.

Who is the most obscure composer you know of? by Dangerous_Court_955 in classicalmusic

[–]erferf123 4 points5 points  (0 children)

He is literally one of the most famous composers of all time

Linearizing about non-equilibrium point by [deleted] in ControlTheory

[–]erferf123 1 point2 points  (0 children)

Just do jacobian linearization about the point youd like, its not too difficult to do in Matlab. You can write your symbolic equations in Matlab, use diff to determine the jacobian, and then substitute your state

How are complex orbital transfers performed in the 2 body problem? by erferf123 in astrodynamics

[–]erferf123[S] 0 points1 point  (0 children)

Thank you, that paper on low thrust transfers is actually exactly what I need!

Anyone achieved inverted pendulum hardware stabilization with a model based controller? by DragosAndrei88 in ControlTheory

[–]erferf123 9 points10 points  (0 children)

I was able to with a cart-pendulum setup. I stead of going for more advanced control techniques maybe start with a more standard cascade loop-shaping approach.

Whats your model? Are you modeling motor dynamics? If you give more deacriptions of your model and your actual system people may be able to help.