E-Drive Example

This simplified E-Drive system is composed of an electric machine, its controller and its power electronics. From the user perspective, the system is primarily responsible for the acceleration of the vehicle. From the architecture perspective, the system is responsible for controlling the torque that is applied by the power electronics.
The system is also composed by the rotor position sensor, which measures the angle of the rotor of the e-machine, the phase current sensor, which measures the phase current values of the three phases that flow through the motor and a torque controller that calculates the torque and sets the PWM. This last value is calculated out of: the measured phase current values, the angle of the rotor and the torque reference-value. This last one is set by the acceleration pedal sensor, according to the drivers desires. Finally, The PWM is applied to the power stage driver, which adjusts the current for the e-machine and therefore sets the desired torque. The e-machine converts in this way the electrical energy into mechanical energy. In the modeled example you will find further components, which have been integrated in the architecture as part of the safety measures. Primarily to avoid an undesired vehicle acceleration.
New content has been added to the E-Drive Model v2.0:
  • GSN
  • Failure Type Systems

User Manual

The user manual gives advice on the following topics regarding safeTbox:
  • Installation
  • Getting started
  • Modeling capabilities
  • Analysis capabilities
  • Usability features

Airbag C²FT Tutorial

This tutorial shows, how the modeling and analysis of component-integrated fault trees (C²FT) can be carried out for system design models with safeTbox™. Therefore, a simplified component model of an airbag as well as a part of its failure logic is given that shall be extended step-by-step in the course of the tutorial. Thereby you will learn on the one hand the advantages of C²FTs with respect to flat fault trees and on the other hand, how safeTbox™ can support efficient safety modeling with the help of its usability features.
The zip-archive that can be downloaded below consists of a textual description of the exercise as well as the EA model file (.eap) containing both tutorial starting point as well as the final solution.