# Description

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This PR fixes a bug in actuator initialization where effort limits
specified in USD assets were being incorrectly overridden with a very
large default value (1.0e9) for explicit actuator models.

Fixes # (issue)

Previously, the ActuatorBase initialization logic would unconditionally
fall back to _DEFAULT_MAX_EFFORT_SIM (1.0e9) for explicit actuator
models when effort_limit_sim was not explicitly set in the
configuration, even when the USD asset contained finite, meaningful
effort limit values.

## Type of change

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- Bug fix (non-breaking change which fixes an issue)


## Checklist

- [x] I have read and understood the [contribution
guidelines](https://isaac-sim.github.io/IsaacLab/main/source/refs/contributing.html)
- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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---------
Signed-off-by: Juana <yvetted@nvidia.com>
Signed-off-by: Kelly Guo <kellyg@nvidia.com>
Co-authored-by: James Tigue <166445701+jtigue-bdai@users.noreply.github.com>
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
Co-authored-by: Kelly Guo <kellyg@nvidia.com>