Systems (1D)

Built on it

• Astronautics and space systems — Orbital teaching sheets for PartCraft: circular orbit speed and period, two-burn transfer delta-v with the rocket equation, and radiative equilibrium temperature.
• System models (1D) — Vehicles, HVAC plants, batteries as 1D models.

Use it in your add-on

Name it in your manifest's needs. When someone adds your add-on, their account brings this engine too, and every edition loads it the first time your add-on needs it. Version ranges arrive with AL.13.

{
  "id": "com.example.my-addon",
  "apps": ["partcraft", "bimcraft"],
  "needs": ["engine.sys"]
}

Methods and standards

Planned and partly written: acausal elements in one set across domains, with transformers and gyrators between domains (a motor, a gear, a lever), solved by Newton iteration with trapezoidal or backward Euler steps and adaptive step size.

Limits

Planned, not available. The written library has no state events or hybrid switching, no AC small-signal analysis, a dense finite-difference Jacobian, and a flat Modelica subset only: its mechanical library classes are not mapped, and every unsupported class is named as a problem. Vehicle, plant and battery models are not written yet.