MD-11. Electrical system.

This is the first of a series of posts where we will be presenting the work that is being done for the Rotate MD-11 related to the systems and functionality. The first system that we have considered is of course the electrical system.

To be able to reflect the complexity of this aircraft we have chosen to model the systems with a component oriented design. Each component in the electrical system simulates its electrical state in terms of voltage, current and load. Abnormal function and failures are also integral part of the components. This produces a very convincing behavior of the system internals, the indication instruments, and the alerts. Most of the alerts and consequences are simulated.

Logic has been implemented to mimic the sources priority, No Break Power Transfer and Parallel Operation, as well as the Emergency Power Transfer, with functional battery, charger and air driven generator. Dual Land mode and Smoke procedure are also simulated.

Shown in the screenshots are the Start sequence (above) and the Smoke Procedure sequence (below).

These components have been simulated independently:
– Detailed engine IDGs, APU, ADG and external power generators.
– 29 electrical buses.
– 32 relays.
– 6 automatic circuit brakers.
– Separated AC/DC distribution with four transformer-rectifiers.
– Inverter and battery charger.
– All overhead controls are operative and functional.
– Automatic and Manual modes are simulated.