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技术的发展使得一些新的性能有可能实现,为了把这些新性能综合到飞机的功能中去,航空电子系统必需具备一定的灵活性。由于这个附加的任务,一个实现航空电子系统的可靠而经济有效的手段——带有镶嵌式计算机网络的航空电子结构已经出现了。这些结构也为系统工程师提出一个值得研究的系统管理和综合化任务。本文描述系统综合化的发展过程,并且讨论一些网络扩展的设计和评价方法,其目的是将这些新的性能组合到系统中来。第一种方法就是实现功能分隔和选定网络控制的策略,其目标在于减少接口成本。总线通讯系统不是一个无限的资源,于是通讯的约定和信息的处理必须要精打细算地来规定。第二种方法是实现网络的具体方法。其目的是在不增加网络控制的复杂性的前提下来增加系统的能力。这两方面的考虑导致了用层次网络作为解决问题的途径。
The development of technology has enabled some new capabilities to be realized. In order to integrate these new capabilities into the functions of the aircraft, avionics systems must have some flexibility. Thanks to this additional task, a reliable and cost-effective means of implementing avionics systems-avionics with embedded computer networks has emerged. These structures also present a worthwhile system management and integration task for system engineers. This article describes the evolution of system integration and discusses some approaches to network extension design and evaluation that aim to incorporate these new capabilities into the system. The first approach is to implement a policy of functional separation and network control, with the goal of reducing interface costs. Bus communication system is not an unlimited resource, so the communication protocol and information processing must be carefully planned. The second method is to achieve the specific method of the network. Its purpose is to increase the system’s capabilities without increasing the complexity of network control. These two considerations led to the use of hierarchical networks as a solution to the problem.