INSTRUMENTATION AND CONTROL CIRCUIT HAVING MULTIPLE, DISSIMILAR SOURCES FOR SUPPLYING WARNINGS, INDICATIONS AND CONTROLS, AND AN INTEGRATED CABIN PRESSURE CONTROL SYSTEM VALVE INCORPORATING THE SAME

摘要

An integrated cabin pressure control system valve that uses a dual, redundan t channel electronic control unit for both control of the valve (204) and to supply alarm, indication, and control signals to the aircraft's avionics system. Each channel in the electronic control unit includes an instrumentation and control circuit (301, 303) that uses multiple, dissimila r sensors (102, 104) and signals for warnings, indications, and controls. This configuration reduces the likelihood for a common mode failure that could result in a postulated gradual decompression without indication event.