Two link planar robot elbow errors in textbook (Inverse kinematics)

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Homework Help Overview

The discussion revolves around discrepancies in the definitions and illustrations of angles in a two-link planar robot's inverse kinematics as presented in a textbook. Participants are examining the accuracy of the textbook's content and its implications for understanding the robot's mechanics.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning which version of the definitions and illustrations is correct, with some seeking clarification on the forces involved in the mechanism. There is also a focus on the potential misalignment between textual definitions and graphical representations.

Discussion Status

The discussion is active, with participants exploring different interpretations of the textbook material. Some have suggested that the discrepancies may stem from the way terms are defined, while others are probing for more detailed explanations regarding the mechanics involved.

Contextual Notes

There is an indication that the definitions of angles and coordinate systems may not be consistently applied, which could lead to confusion in understanding the robot's behavior. Participants are considering the possibility of errors in the textbook's illustrations versus its text.

Ineedhelpwithphysics
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Homework Statement
The textbook is telling me this is elbow up but when I search on the internet it shows me something else.
Relevant Equations
law of cosines, law of sines, Pythagorean theorem
Textbook: vvvvv
1696949125870.png


Online: VVVV
1696949162406.png
 
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Which one is right?
 
Ineedhelpwithphysics said:
Which one is right?
Could you explain your question a little more?
What force is animating this mechanism?
 
This is strictly a matter of how these terms are defined by the text. The angles must correspond to the definitions provided. Possibly the book screwed it up: the illustrations and text are often done by different groups of people..This is why coordinate systems should be indicated explicitly..
 
Last edited:

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