Not so clear what configuration we are solving for in the four bar linkage nsolve example

moorepants / learn-multibody-dynamics

Interactive computational book on multibody dynamics

https://moorepants.github.io/learn-multibody-dynamics/

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Not so clear what configuration we are solving for in the four bar linkage nsolve example #185

Open moorepants opened 2 months ago

moorepants commented 2 months ago

There are multiple solutions and I don't really specify why I chose -75 deg and 100 deg as the guesses.

Peter230655 commented 2 months ago

I assume, you wanted a certain initial configuration, maybe you made a rough sketch of the configuration you wanted, and then estimated the angles $q_2, q_3$. Maybe worth mentioning, that the multiple solutions correspond to various realizeable configurations of the four-link system?

moorepants commented 2 months ago

Yes, it is missing a sketch that aligns with the configuration that I find. A student was confused about why I choose the guess I did and I realized that is not explained.