CINDER

CINDER is a mechanics-first Python model for rubber V-belt continuously variable transmissions (CVTs). The installed package is imported as cinder.

CINDER models the CVT as a mechanical plant with explicit pulley geometry, belt contact, clamping mechanisms, inertias, shaft boundaries, and hybrid contact/operating modes. The package is independent of the CVT-Simulator web frontend and backend.

Install

python -m pip install cinder-cvt==1.1.0

Verify the installed distribution:

python -c "import cinder; print(cinder.__version__)"

Expected output for this release:

1.1.0

Runtime dependencies are intentionally small:

NumPy
SciPy

Public Python API

CINDER v1 has three supported import surfaces:

cinder — core mechanics, composed systems, shaft boundaries, hosts, and hybrid execution entry points.
cinder.contracts — versioned JSON-safe assembly/simulation documents, validation, schema information, and result projection.
cinder.studies — supported static geometry and actuation study APIs.

Modules beneath these public surfaces remain available to advanced users, but deep implementation-module paths are not the compatibility boundary for v1.

Run the reference example

The source repository contains a current fixed-pivot Baja reference case:

python cvtModel/examples/quickstart.py --run

The example imports the installed cinder package. It does not require the frontend or backend.

Documentation

Repository-only material

The monorepo also contains launchTools, tools, validation artifacts, the backend, and the frontend. Those directories are useful to the project but are not part of the cinder-cvt wheel or source distribution.

License

CINDER is licensed under the Creative Commons Attribution-NonCommercial 4.0 International license (CC BY-NC 4.0). Commercial use requires separate permission. See LICENSE.

Development Status
- 5 - Production/Stable
Intended Audience
- Education
- Science/Research
Operating System
- OS Independent
Programming Language
- Python :: 3
Topic
- Scientific/Engineering

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Provenance

The following attestation bundles were made for cinder_cvt-1.1.0.tar.gz:

Publisher: cinder-release.yml on gr812b/CVT-Simulator

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: cinder_cvt-1.1.0.tar.gz
- Subject digest: 15aaf8c09fb2df36d5a878af05eb052ae167b752879225b0ab230d73caf4b0d2
- Sigstore transparency entry: 2755206901
- Sigstore integration time: Sep 8, 2026
Source repository:
- Permalink: gr812b/CVT-Simulator@7a7de66b88c4ef702f795c116e040a24cab38046
- Branch / Tag: refs/tags/cinder-v1.1.0
- Owner: https://github.com/gr812b
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: cinder-release.yml@7a7de66b88c4ef702f795c116e040a24cab38046
- Trigger Event: push