Modern Robotics, Chapter 7: Kinematics of Closed Chains

[@marius355]

Great introduction, thank you very much!

[@padhmeshu]

My brain is melting

[@ygao9715]

I love your videos, please post more video for chapter 8 till chapter 13.

[@WhitishSine8]

Could you go deeper in the stewart platform explanation?

[@tiarakusumadewi2337]

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[@readdaily5680]

Woooohoooo! Thanks for this

[@giovanniferreira802]

Great introduction, thank you very much! May I ask you which book you following?

[@DrBeb8]

What about dynamics?

[@koen5905]

What does it mean by unit 3-vector?

[@alexisandersen1392]

A unit vector in a 3-space

[@williamhuang5329]

Hanzhen harmonic drive gear , robot arm gear over 30 years experience ,

[@rbtx99]

Do you actually intend on helping anyone with this information or are you showing off your math vocabulary? The people who understand this terminology don't need help figuring out the solution themselves. Why can't you just say: Set 0 0,0 to be the center of the platform resting at its default location. Take the XYZ coordinates of each ball joint of the platform and rotate them with the desired yaw, pitch and roll angles of the platform using a rotation matrix. Then translate them by the desired XYZ movement. Finally compute the length of each actuator using pythagoras theorem in 3 dimensions betwwen the XYZ of each platform ball joint and the matching ball joint of the base.

[@FPVivid]

I disagree with you. I'm studying for a Robotics Final and this was a super refreshing overview of IK of Parallel Manipulators. Although I didn't take much from the velocity section (which I haven't covered yet in my program), the rest was well stated in an academic setting. Far more understandable than a convoluted textbook chapter summary. What your asking for with specific coordinates is exactly what he did, but with proper nomenclature to cover all variables of the specific system. 5 out of 5 summary

[@rbtx99]

@@FPVivid and I disagree with you. I am a professional engineer who has built several robots and motion control systems including Stewart platforms. I understand 100% what he is saying and to me it sounds like he is preaching to the choir. If you simplify the delivery of the content more people can understand it and benefit from it. For one moment forget everything you know about this topic. This is no longer a revision for you but the first time you are looking into this subject with a moderate background in maths. How much can you understand?

[@FPVivid]

@@rbtx99 Perhaps its been too long since you have been in school then. Re-watching this, i still believe the explanation is pretty basic and can be applied broadly. It does break it down into general trig which most individuals with a moderate background in math should be able to follow; without it having to be specific to robotics. With saying this, what people take from this video is opinion based. People learn in different ways and you should respect that before calling out a "bad explanation" when its only "bad" to you.

[@ethanchandler2792]

I respectfully disagree; as an undergraduate freshman who just finished a course on serial linkages, I feel that the material was presented in a comprehensible and concise manner. In fact, I wish he went into more detail, not less. The “math vocabulary” is important because it ensures consistency across multiple sources, and I think this professor did a good job at adhering to the common nomenclature seen in the literature.

[@alexisandersen1392]

Welcome to high level academic KZbin video content. These are NOT practical videos to get your feet wet in the topics, this is material to explain the codification in proper industrial and scientific terminology the specific nature of ones approach to discussing mechanical systems with a fellow academic, analytical engineer, or scientist. It's not even meant as a precursor to practical engineering of mechanical systems... something you honestly don't even need a full university education to do. Criticizing it for being abstract, analytical, and full of jargon is like criticizing the the heat or brightness of the sun. Additionally if this particular video is someone's first time looking into this stuff, they might read the title, and realize that they're missing some foundation. I mean.... This is the 7th chapter for one.

[@SwordQuake2]

Is this from a university course? You pay for a skimming a skimming of a topic...

[@PepeSi7via]

Can you explain this without their equations? Lol

[@amr.a-m8350]

Great introduction, thank you very much!