System having parallel data processors which generate redundant effector date to detect errors
A high assurance processing system includes a plurality of data processors coupled in parallel, a bridge coupled to the plurality of data processors, and an input/output processor coupled to the bridge for coupling to a sensor and an effector. Sensor data passes to the bridge through the input/output processor for processing by the parallel data processors, which generate redundant effector data for comparison by the bridge to detect errors. If data matches are found, data is transmitted to the effector.
1. A processing system, comprising:
a plurality of data processors coupled in parallel;
a bridge coupled to the plurality of data processors; and
an input/output processor coupled to the bridge, the input/output processor adapted to be coupled to a sensor and an effector;
wherein sensor data passes to the bridge through the input/output processor for processing by the plurality of data processors, which generate redundant effector data for comparison by the bridge to detect errors and transmission to the effector.
2. The system according to claim 1 , wherein the bridge includes a synchronization module to synchronize data processing by the plurality of data processors.
3. The system according to claim 2 , wherein the synchronization module includes semaphore bits.
4. The system according to claim 1 , wherein the bridge includes a data transfer and voting module to control data transfer between the input/output processor and the plurality of data processors.
5. The system according to claim 4 , wherein the data transfer and voting module includes a series of comparators to compare data from the plurality of data processors for identifying errors.
6. The system according to claim 1 , wherein the sensor includes a plurality of navigational sensors.
7. The system according to claim 6 , wherein the effector includes at least one mechanism to control an aircraft.
8. The system according to claim 1 , wherein the input/output processor and/or the data processors are commercial off the shelf processors.
9. The system according to claim 8 , wherein at least one bus connected to the bridge is an open standard bus interface.