The course is very good.\n\nThe classes are well taught and show general concepts. It is necessary to do research on the internet, to solve the assignments. This is not a bad thing in my point of view
I think this is very good course of aerial robotics research. Being a student of robotics, I feel that some of stuffs in this course needs a good background in control and mechanical engineering.
von Danial H•
It teaches you a lot, but remember to put more and more effort into it, provided that you are less familiar with this particular topic of Robotics like me. Having an approximately solid background in Linear Algebra and Mechanical Engineering Principles such as Dynamics will help you more than you think (I had somehow severe difficulties in this area). You can skillfully deal with the study materials, pass the quizzes, and do the assignments if you work relentlessly, stay focused, and most importantly, be consistent. The course has its flaws. You may see it more than usual in some cases but remember that great discussion forums that address your concerns and guide you with their assistance are always there. Nonetheless, you can learn from others and get access to wonderful resources others suggest.
von Robert E•
Quite a bit of the assignments was just tuning control parameters. If this is that important a part of designing controllers, you should spend more time on how to tune them. Discuss what physically reasonable or expected gains or damping to see on real world drones in lectures, and physical implications of the control parameters (i.e. is it reasonable to have pitch error gain of 50? 1000? should damping be expected to be 5 or 500? why?). It would also be helpful to discuss more of the dynamics of quad-copters, such as coupling of controls. Are there specific modes of coupled responses analogous to, say Dutch Roll? Are there any controls inputs that can be decoupled form others? Knowing this would make the tuning exercises more educational rather than just guessing.
von Victor L•
This course was not so easy( and I mean, that's good ) Some assignments were rather difficult and they forced me to spend several nights for looking the right solution. So, sometimes I felt myself a bit tired) Fortunately I've passed that, before over of session; Good side of this course, it has a lot of material for self-study, i mean, lectures, supplement materials, related some aspects of math and matlab tutorials also good references on advanced level materials ( like Trajectory Generation and Control for Quadrobots ). Although, this stuff requires a thoughtful studying, I have a great interest to get it. I was really impressed by videos of experiments with robots. In other side, some lectures and materials have mistakes.
von Jiang, S•
The course is a great course! I never know I could write a 3D Quadroter controller and a trajectory generator!
The missing one star is about the diffculty of the course. I lack some of the knowledges of the control theory. They are not in the prerequisite of the course and I don't know where to look for them. But if you are from a EE background, I expect it won't be a issue for you. The parts that's still unclear to me is how the equations of the dynamics of the system is converted into two/three layers of nested controls.
The assignments are great in that the simulation gives you a clean way to visualize what's happening making you focus on the core staff.
Thanks a lot Vijay!
von Maurício P•
O curso é bastante interessante, mas você deverá estar com um nível legal de conhecimento em Cálculo e Álgebra Linear se quiser realmente aproveita-lo.
Não gostei muito de algumas das avaliações, pois existe a chance de a gente passar apenas chutando, ou seja, se errar, só tentar novamente em seguida ou em algumas horas. Como é o meu primeiro curso aqui no Coursera, não sei se todas as avaliações são assim, mas é algo que deveria mudar, de alguma forma.
Mas o que mais gostei do curso foi ele ter despertado a vontade para estudar para valer "sistemas de controle". É o que farei a seguir, antes de partir para os outros cursos dessa especialização em robótica.
von Eelco K•
Very interesting course, with some toothing problems and unrealistic timescales for many.
For me, it would have been impossible to complete the course without the support of some extremely bright and helpful classmates, active in discussion fora (almost a given in a MOOC, but nevertheless, a course should be designed such that one could complete it without the fora).
More guidance on the programming assignments would be the first thing I would focus on for the next edition, as well as setting some realistic timescales (there is probably no way for the majority of participants to complete the last assignment within the 3 hours advised for it...).
von Sam S•
This course covered a lot of material, provided a well-rounded intro to the physics of 3D motion in the quad rotor context, included excellent supplemental videos to explain some of the tough mathematical concepts, and included well-designed practical assignments.
The bridge between lecture and assignment, particularly the trajectory planning question in the last assignment, could be refined as the course iterates, although the material I found myself struggling through that very tough problem may be that which I retain most from this class.
Over all an excellent class, and I'm looking forward to the rest of the series.
von Prayag S•
Overall course is very good to get an in-depth knowledge of control systems and motion planning for UAVs.Having worked in the field of UAVs for the past one year as a researcher the only problem that I found was that there could have been another video stating its implementation on widely available drone platforms such as on ROS and Pixhawk interface or on any other computer-flight controller interfaces so that one could try to implement this in real life on actual quadcopters. Also if any mentor or fellow learner has already done an implementation I would like to know. Overall great course and the team of mentors.
von Giovana C T•
I loved the course, it was way beyond my expectations. Everything well explained. I only have on critic. I think the assignment of 5 waypoints trajectory was not in accordance with the rest of the course. Imagine the tests following a level line and abruptly changes to something too hard. I think the purpose here is to learn and not find out people with special skills. Many of our colleagues that were following the course simple gave up due to this assignment. And also took 25 hours average for many of us, that not dispose of this time, since the proposed time to complete the tasks are of three hours.
This course is quite tough, and I often thought to myself: "If this is an intermediate level, what does a professional level look like?" Especially the later assignments are quite difficult and time consuming to solve (it says, you need approximately three hours to solve the last one. Well, it took me about 30 hours to come up with a half-decent attempt).
However: if you really want to learn something new about cool flying robots (and who doesn't?) and are willing to spend quite an amount of effort and time, this is the course for you!
von Aswan K•
The course was very useful, but the study material had several printing mistakes in formulae/ derivations that caused problems for some learners. Luckily there were more experienced people around to help, but the course organisers should be more careful in their material. Also, it would help if free software like octave is used rather than matlab.....it was a nightmare to download and install on my ubuntu computer and i still get annoying telephone calls from matlab people asking me if i'm interested in buying the full version.
von Daniel C•
It is a great course for me. At the end of the course, I learned how to generate a trajectory having several set waypoints and have my drone follow the trajectory autonomously in simulation.
As opposed to the stated prerequisite, I believe the course requires engineering/math/physics background.
On the down side, there is no TA presence in the discussion forum. You will need to rely on your classmates if you are stuck. Also the second assignment requires hours of tuning, which serves almost no educational purpose.
von Viktoras T•
Great amount of material for a novice. For me who has never done anything like this, but who has a ton of programming experience, the hardest part was to understand the concepts behind all the formulas. Slides and instructor's explanations were good, but required a good deal of studying to really understand it. Overall, I learned a ton and really got to know the math behind the flight control. Programming assignments got significantly more challenging as the course progressed, but also more informative.
The only thing I think that put this course on the back foot is the absence of mentors and TAs. They should be pretty active enough to clear the doubts that pops up while clearing quizzes or programming assignments. Its just the people on the forum that comes handy but even when they are not sure about the concept then the going becomes tough. Apart from that, the course is one of the best of its kind and trust me you will never regret doing this certification !!! Good job team UPenn !!!
von Keng-Hui W•
von Eric D•
The material is very informative and generally well presented. I would have liked more video explanation about the minimum snap trajectories as this was a large part of the final assignment.
If the Matlab resource was an actual desktop application instead of online, the assignments would have been much easier and quicker to accomplish. Matlab online, in my experience, is slow and hard to work with in a single browser window.
Overall, I enjoyed this course.
von Cristian D T•
I don't give a full score just because a little piece of the last assignment code felt a little buggy, the lecturer could improve (it feels like he is reading a textbook) and the explanations could also be better, but the assignments are very well planned, they scale from simple to nightmare at a good pace. The last assignment is probably the hardest programming exercise I've seen in coursera. Very nice for people with some engineering background.
von Ahmad F•
After following this course for about a month, i can say that the course fit to my curiosity in aerial robotics. From this course i can dig broad and initial knowledge to the aerial robotics. However, final task was difficult and i think the course participants should read carefully the definition of notations. Some notation should be written clearly next time (or in the future revision). Overall, i am satisfied with what i got from this course.
von Daniel S•
I thought the course was very laid out in going from an overview towards more specific and harder material. For the most part, I thought the assignments were very good and did a thorough job of teaching feedback control. My only problem with the assignments were that they seem to overemphasize a trial and error approach for tuning the k gains. This became very tedious especially on the third assignment where the simulator ran so slowly.
von Greg K•
Really fascinating material and loads of good information in the lectures. The homework assignments were satisfying if you can complete them, but unfortunately involved a lot of tedious trial and error. This was especially difficult since running the program can be slow which causes slow iteration of trial and error. I would not have been able to complete the assignments without helpful information in the course discussions.
von Erick A M D•
El curso tiene pocas explicaciones, aunque el contenido es muy bueno. Creo que debería de durar 8 semanas en lugar de 4, para poder profundizar más en cada tema.
En el proyecto final, las simulaciones de MATLAB son muy lentas (superiores a 1 hora), y parte del trabajo es a prueba y error, por lo que tienes que dedicarle mucho tiempo.
Por otro lado, la idea del proyecto final es bastante buena.
von Michael B•
Not for the faint of heart as you are expected to be (somewhat) up-to-date on derivatives and primitives for position, velocity, and acceleration. However, even with a minimum background in mathematics and a healthy dose of determination it is possible to succeed in this course. Do not expect it to be easy but really worthwhile if one is interested in quadrotors and "what makes them fly".
von Aznan F•
It's my first course in coursera. Aerial Robotics is a great course for me to learn more about quadrotor control. Some tools in matlab are very useful to help me deeply understand the material of the course. Unfortunately, formula or model of control have not explained yet. I hope, formula of model of the control can be explained, even it need external source or refer to some books. :)
von 2K18/EE/089 K S•
The programming assignments need to be based on what was taught in the video lectures. The programming assignment in week 4 was way beyond what was taught. Overall, the course was really well structured and was taught in easy to understand language. I will surely recommend this course to all my friends. Finally, a big thank you to all the instructors and Professor Vijay Kumar!
von Emmanuel V P•
It is a amazing course, you can learn a lot of things a about robotics and their behavior. I recommend that improve the complement sections because sometimes I really got confused with a few terms. Also, It is going to be great if you recommend textbooks to refresh the algebra, differential equations with more examples. I really appreciate your time and lectures. Best Wishes!!