u/Kenno03

Hello there!

Usually when we model DC-motors we use a second order system, however, BLDC motors used for drones are usually stepper motors (as far as I know), so my question is simply, how do we model these? The specific motor I want to model is for a project of my own, and I am curious as to how to model it. Motor: https://www.aliexpress.com/item/1005007273770590.html#nav-specification

My intuition is to also just model it as a second order system, however, am not sure if this is the correct approach. Specifically I want to model it has motor command [0,1] to rad/s (rotations).

Thank you in advance for the help

Hello there!

In February of next year I will be starting my masters thesis, but I have no idea what I could even write about. For my bachelors I did 'Convoy driving of differential drive robots" which was fun since I got to be very hands on with the subject. More specifically what ever theory I developed or read about, I could see in action in the real world.

Ideally for my masters I would like to do something hands-on too, but also have a good amount of high level control theory to work with as well.

I have some experience and interest in quad-copters, and I've considered doing something with that, however, I am open to any and all ideas, hence my question.

As a control engineer student, what did you do for your thesis, and what could be something interesting to write about? What could the topics for instance be?

Thank you in advance for taking your time reading this, it is much appreciated! :)

Hello there!

I am currently finishing my second semester on my masters at DTU (Technical University of Denmark) in Electrical Engineering with a specialization in Robotics and Automation.

Through out my studies I've learned a lot about control theory, and still have more courses planned. Namely I've completed courses in:

• LQR, Kalman filters, Fullstate feedback controllers, etc.
• Stochastic Adaptive Control (GPC, MV_0 Controllers, ARMAX models, etc.)
• Fault tolerant and Robust control, (Residual generation, H_inf controllers, CUSUM, etc.)
• Digital Control (How to actually implement it in code).
• PLCs.

And I am planning on doing some courses in Advanced nonlinear Control, Model Predictive Control, robotics and so on.

When asking my teachers what a control engineer actual work with, the more or less come with the answer being "same as what we do here".

I could see how that is correct, that being if you are working on some plant (say a windmill) and you are to design the controller for the turbine, you use some control theory to ensure that it is stable and so on. But how long is this process in reality?

Additionally, I am not sure how much need there are for control engineers in the job market, so I would assume that we also do other stuff aswel and not only work in Matlab and or some PLC IDE.

Thus my question.

What does control engineers actually do / work with? And how much do you use what you've learned in school on your job?