Diehl Avionik Systeme Gmbh

Stefan Orth

Peter Hoche

A bus architecture has a central processing unit, a data line and bus users. The central processing unit and the bus users are connected to the data line via a bus interface. The data line is constructed as a ring and the central processing unit has two transceiver units which can be switched between transmit and receive modes. The central processing unit provides a clocked emission of data intended for the bus users. The bus users are successively connected to the data line, and each contains a monitoring unit, which is connected to the associated bus interface and is configured for activating a transmit activity of the bus interface only after receiving a synchronization message, and otherwise blocks this activity. In a method for exchanging data with such a bus architecture, a high fault tolerance, particularly when the data line is cut through, and error locating capability are achieved.

Bus architecture and method for exchanging data

An open-loop and closed-loop control unit for a safety-relevant apparatus, in particular for aviation applications, has a computer unit with a number of computer inputs and computer outputs, and a circuit unit with a number of circuit inputs and circuit outputs. The circuit unit has hardware components for simulating some of the logic operations that can be carried out in the computer unit. The circuit inputs and computer inputs that correspond to one another with respect to the simulated logic operations are each connected in parallel to a signal input line. The computer outputs and circuit outputs which correspond to one another with respect to the simulated logic operations are each connected to a decision-making unit, by which an output signal for open-loop control of the safety-relevant apparatus can be emitted as a function of the correspondence between the signals from the computer output and from the circuit output.

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Eschenburg, Germany

Stefan Orth