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Simulation & digital-asset dossier · 04

Gazebo SDF & Fuel: freezing a simulation world before it becomes evidence

Connect SDF versions, world composition, model URIs, Fuel snapshots, plugins, sensors and physics settings without allowing a remote asset or floating resource path to change beneath a published result.

Evidence statusMature open simulation stack · remote assets remain independently versioned · fidelity is configuration-specificSources checked 4 August 2026
Read the digital asset map ↓Back to simulation references ↗

Identify the exact asset first

A catalogue name cannot replace the exact format, upstream commit, generation arguments, runtime and licence.

Gazebo composes robots, environments, sensors and plugins through SDFormat. Gazebo Fuel hosts and serves reusable simulation assets, while local resource paths can pin downloaded models for repeatable worlds. The format, simulator release, physics engine, remote asset revision and plugin set must be treated as one tested configuration.

Digital asset map

Put formats, geometry, dynamics, scenes, loaders, versions and provenance onto one dependency map.

01

World & model definitions

Publicly available

SDF files describe worlds, models, links, joints, lights, physics, sensors and nested includes.

Verify before adoption

Freeze SDF version, Gazebo release, world file, nested model files, URI resolution order and all local modifications.

02

Fuel resources

Publicly available

Hosted models and worlds can be inserted by URI, downloaded through the GUI or retained under a local resource path.

Verify before adoption

Archive owner, resource name, version or snapshot, metadata, file hashes, licence and the exact resolved URI.

03

Physics, sensors & plugins

Publicly available

Solver settings, timestep, contacts, sensor configurations and system plugins define runtime behaviour beyond geometry.

Verify before adoption

Record engine, solver parameters, update rates, noise models, plugin versions, transport topics and deterministic seeds where available.

04

Evidence outputs

Publicly available

Logs, topics, recorded state, screenshots and test worlds can support regression and scenario comparison.

Verify before adoption

Preserve failures, initial conditions, machine/runtime information, timing and acceptance thresholds—not only successful video.

Layered licence reading

Loaders, model XML, meshes, textures, brands and generated outputs may belong to entirely different rights layers.

Asset layerKnown statusAdoption decision
Gazebo and SDFormat software

Gazebo packages and SDFormat components publish their own open-source licences by repository and release.

Record the exact package set and preserve notices for every redistributed component.

Fuel models and worlds

Each hosted resource can have its own owner, licence and source history; service availability is not a blanket licence.

Inspect and archive resource metadata before download, redistribution, publication or commercial use.

Meshes, textures, brands & converted files

Third-party geometry, appearance assets and trademarks may retain terms different from SDF or plugin code.

Maintain a file-level rights manifest and do not infer manufacturing or endorsement rights.

This table is a source-navigation and engineering-decision aid, not legal advice. Use original licence texts and qualified advice for an actual decision.

Model & asset validation gates

From identity freeze and structural checks to behavioural calibration and experiment replay, prove what the model can support one gate at a time.

  1. 01

    Immutable world manifest

    Evidence to preserve

    Gazebo and SDF versions, world checksum, Fuel snapshots, local resource tree, plugins, engine, parameters and licences.

    Stop condition

    Stop if any model, plugin or remote URI cannot be reconstructed from the recorded manifest.

  2. 02

    Structural and resource validation

    Evidence to preserve

    Schema checks, resolved URIs, link/joint tree, units, inertials, collision geometry, sensor frames and plugin loading.

    Stop condition

    Do not benchmark unresolved warnings, missing resources or silently substituted assets.

  3. 03

    Behavioural calibration

    Evidence to preserve

    Declared tests for kinematics, contact, friction, actuation, sensor timing, latency and failure behaviour against measured references.

    Stop condition

    Do not claim predictive fidelity for properties without measured comparison and error bounds.

  4. 04

    Scenario regression

    Evidence to preserve

    Fixed initial conditions, seeds, expected events, tolerances, logs, failure cases and comparison after every dependency update.

    Stop condition

    Do not compare releases when world or engine drift has not been quantified.

FUURAA analysis

A digital asset becomes valuable when a team can explain where it came from, how it changed and which behaviours have been proven.

01

Best use

Building explicit, versioned robot-and-environment scenarios that can run in continuous integration and be shared across ROS 2 workflows.

02

Main risk

A short Fuel URI can hide a mutable remote package, independent licence, missing mesh, changed physics setting or runtime plugin dependency.

03

FUURAA judgement

A publishable Gazebo result should ship with a frozen local resource bundle, world manifest, rights record and behaviour-specific calibration report.

Applicability boundary

Simulation assets can accelerate research, training and integration; they do not automatically become manufacturing drawings, a physical digital twin or a safety case.

Can support

  • Versioned SDF worlds and robot scenarios
  • ROS 2 simulation integration and regression
  • Hosted-asset discovery with local pinning

This page cannot replace

  • Physical CAD, BOM or manufacturing tolerances
  • Measured real-world dynamics and sensor performance
  • Resource-specific legal and safety review
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