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compute the contact wrenches in the sole frames #76

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VenusPasandi opened this issue Apr 14, 2022 · 2 comments
Open

compute the contact wrenches in the sole frames #76

VenusPasandi opened this issue Apr 14, 2022 · 2 comments
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@VenusPasandi
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VenusPasandi commented Apr 14, 2022

In the simulator, we compute the pure forces applied to the contact vertices of the feet and then we convert them to the resultant wrenches applied to the feet soles and represented in the corresponding foot frame. In this regard, we use
\begin{equation}
\begin{aligned}
F &= ^f R_w \left( F_1 + F_2 + ... \right), \ \newline
T &= Skew(^fp_1) ^f R_w F_1 + Skew(^fp_2) ^f R_w F_2 + ... , \
\end{aligned}
\end{equation}

We use the above formula for the both rectangular and circular feet. But, it is not for the circular feet as the contact point in the circular feet is an instantaneous point and is not constant even in the foot frame.

@VenusPasandi VenusPasandi self-assigned this Apr 14, 2022
@DanielePucci
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@VenusPasandi the math seems not to render, cannot read

Please remember to add labels, history points, etc

@VenusPasandi VenusPasandi added the bug Something isn't working label Apr 16, 2022
@VenusPasandi
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@VenusPasandi the math seems not to render, cannot read

sorry, I corrected the math.

Please remember to add labels, history points, etc

yes, sure

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