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Slight correction to Marten's equations.
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moorepants committed Oct 3, 2024
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Showing 1 changed file with 13 additions and 12 deletions.
25 changes: 13 additions & 12 deletions main.tex
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Expand Up @@ -700,8 +700,8 @@ \subsection{Utility of the Logistic Model and Extrapolation to Natural Falls}
applied angular impulse $L$, and dividing this by $\sigma_{L}$. The same
applies for the perturbation order $j$, initial roll angle $\phi_0$, and
initial steer angle $\delta_0$. If we take the coefficients estimated for
cycling at 6~\si{\kph}, the log-odds of falling can be calculated as follows:
\todo{Check this equation, where is \(\bar{L}\) 100N in the equation?}
cycling at 6~\si{\kph} and example means, the log-odds of falling can be
calculated as follows:
%
\begin{equation}
\begin{split}
Expand All @@ -711,22 +711,22 @@ \subsection{Utility of the Logistic Model and Extrapolation to Natural Falls}
= &
-0.29 + 1.69\cdot\frac{110~\si{\newton} - 100\si{\newton}}{15\si{\newton}} -0.77\cdot\frac{10-20}{11.54} \\
& -0.25\cdot\frac{-6\si{\degree}-2\si{\degree}}{10\si{\degree}}
-0.14\cdot\frac{1\si{\degree}+3\si{\degree}}{5\si{\degree}} -0.64\cdot s \\
-0.14\cdot\frac{1\si{\degree}+3\si{\degree}}{5\si{\degree}} -0.64 s \\
= &
1.59 -0.64 \cdot s
\end{split}
1.59 -0.64 s
\textrm{.}
\end{split}
\end{equation}
%
The state of the balance assist \(s\) is a binary variable. If the
balance assist is turned on, the log-odds that a fall occurs are decreased by
0.64. The odds and probability can be calculated:
%
\begin{align}
\frac{p_{ij}}{1-p_{ij}} & = e^{1.59-0.64c} =
e^{1.59}\cdot e^{-0.64s} = 4.90 \cdot 0.53c \\
p_{ij}|_{c=0} & = \frac{4.90}{1 + 4.90} = 0.83 \\
p_{ij}|_{c=1} & = \frac{4.90\cdot0.53}{1 + 4.90\cdot{0.53}} = 0.72
\frac{p_{ij}}{1-p_{ij}} & = e^{1.59-0.64s} =
e^{1.59}\cdot e^{-0.64s} = 4.90 \cdot e^{-0.64s} \\
p_{ij}|_{s=0} & = \frac{4.90}{1 + 4.90} = 0.83 \\
p_{ij}|_{s=1} & = \frac{4.90\cdot0.53}{1 + 4.90\cdot{0.53}} = 0.72
\end{align}
%
Turning on the balance assist system reduces the probability that the
Expand Down Expand Up @@ -858,9 +858,10 @@ \section*{Acknowledgements}
\section*{Funding}
%
This study is funded by Dutch Research Council, Nederlandse Organisatie voor
Wetenschappelijk Onderzoek (NWO), under the Citius Altius Sanius program and in
collaboration with Bosch eBike Systems and Royal Dutch Gazelle. The funders had
no role in the data collection and analysis or preparation of the manuscript.
Wetenschappelijk Onderzoek (NWO), under the Citius Altius Sanius Perspectief
program and in collaboration with Bosch eBike Systems and Royal Dutch Gazelle.
The funders had no role in the data collection and analysis or preparation of
the manuscript.

\section*{Code and Data Availability}
%
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