| 摘要 |
A system having replaceable subsystems is operable in a certified configuration after installation of a replacement subsystem. The system includes several subsystems each installed at an interface. For each subsystem, the interface includes memory having a description of the operati ng environment for that subsystem. The memory stores modules each having a signature, for example, a cyclic redundancy code (CRC). After installation o f a replacement subsystem, a processor in the subsystem checks a list of signatures. Each signature corresponds to a module that is certified for use by an application program of the subsystem. If a listed signature correspond s to a module that is available in the memory, is desirable to be used, and th e subsystem is not presently configured to use such a module, the subsystem reads the module, integrates the data of the module into an operating configuration, and operates thereafter in accordance with the updated operating configuration. In one implementation, an aircraft collision avoidance system includes one or more replaceable subsystems that each read a memory in a tray of the cockpit interface and configure themselves for updat ed operation.
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