The Air Data Computer And The Universal Automatic Test System Of CADC

The Central Air Data Computer (CADC) is' a necessary device to provide data displayed or controlling by instruments of airplane, engine, automatic control system, navigation system, fire control system, air traffic control system and warning system etc. The pressure transducers feel the static pressure and total pressure, and change these pressure signals to voltage signals. These voltage signals should be sampled and calculated. The result should be send to those systems which are mentioned above in the forms required. The result items which are based on the atmosphere are static pressure, total pressure, dynamic pressure, true air speed, indicated air speed, vertical speed etc. The function models and the working principle of the CADC shall be described here , together with the future of the CADC.This dissertation developed a set of automatic test system (DSQ) for CADC. It introduces structural design of the whole system of DSQ, the compartmentalization of modules according to functions of the system. It also expatiates functions of modules. This system fully adopts new technologies of computer and Windows in order to control DSQ to work effectively, steadily and to make the system be manipulated easily. What's more, this system can be easily extended and can satisfy requests of different testing items.