[moco-announce] Release: Moco version 1.1.0

[Nick Bianco]

Hello Moco users,

OpenSim 4.3 was officially released a few weeks ago, and included is the
latest Moco release, version 1.1.0. This release includes a variety of new
examples and new features to help you answer a broader set of research
questions.

The examples exampleIMUTracking
<https://github.com/opensim-org/opensim-core/tree/master/Bindings/Java/Matlab/examples/Moco/exampleSquatToStand/exampleIMUTracking>
and
exampleEMGTracking
<https://github.com/opensim-org/opensim-core/tree/master/Bindings/Java/Matlab/examples/Moco/exampleEMGTracking>
were
added for the recent 2021 meeting of the Technical Group on Computer
Simulation (TGCS). The first example demonstrates how to create a set of
synthetic accelerometer signals from a squat-to-stand motion, and then
track these signals to reconstruct the original trajectory; this example is
a great starting point for incorporating signals from inertial measurement
units in your simulations. The second example demonstrates how to solve the
muscle redundancy problem using MocoInverse while tracking electromyography
signals. This example includes a new feature that allows you to optimize
scale factors that allow you to track the shape of the reference EMG
signals while scaling their magnitudes.

Two user-contributed examples that expand the popular example2DWalking are
featured in this release. A Matlab version of example2DWalkingMetabolics
<https://github.com/opensim-org/opensim-core/blob/master/Bindings/Java/Matlab/examples/Moco/example2DWalking/example2DWalkingMetabolics.m>,
contributed by Brian Umberger, has been included to make it easier to get
started minimizing metabolic cost in a predictive simulation. Russell
Johnson contributed example2DWalkingStepAsymmetry
<https://github.com/opensim-org/opensim-core/blob/master/Bindings/Java/Matlab/examples/Moco/example2DWalking/example2DWalkingStepAsymmetry.m>
which
demonstrates how to predict an asymmetric walking pattern with Moco. This
example features the new goals MocoStepTimeAsymmetryGoal and
MocoStepLengthAsymmetryGoal which allow you to target specified step time
asymmetry and step length asymmetry values with terms in the cost function.

Get Moco 1.1.0 by downloading the OpenSim 4.3 release from SimTK
<https://simtk.org/frs/?group_id=91>.

More details about this release are in the CHANGELOG
<https://github.com/opensim-org/opensim-core/blob/master/CHANGELOG.md> and
CHANGELOG_MOCO
<https://github.com/opensim-org/opensim-core/blob/master/CHANGELOG_MOCO.md>
 files.

Read the Moco paper here
<https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1008493>.


-Nick
-- 
*Nicholas A. Bianco*
Neuromuscular Biomechanics Lab
<http://nmbl.stanford.edu/people/nick-bianco/>|Stanford
PhD Candidate
(772) 284-0354
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