船舶信息系统数据流设计方案研究

为缓解因船舶平台内所涉传感器/执行器数量增加所产生的船舶信息系统数据通信压力，在充分考虑系统能达性/能观性基础上，提出船舶信息系统数据流长度的普适判据，并结合执行器实时物理特性对执行器数据流通信内容进行设定；与此同时，通过提出一种基于传感器当次变值及上次估计误差为索引的双指标评价方法对传感器数据流通信内容优化设计。从而完成了对船舶信息系数据流整体设计方案的研究，在缩短数据流长度的前提下，保证了系统对数据信息采集、处理及应用的客观需求，进而优化系统资源、提升系统性能，并通过举例方式对其工作流程进行较为完整的分析。

Design of data flow for ship information system

In this article, the length and content setting problem of data flow in ship information system (SIS) structure are considered. Reachability and observability analysis methods are proposed to shorten the length of data flow without affecting the expected performance of SIS. According to the determined data flow length, we present task execution time of actuator is considered in its data flow setting strategy for farther optimized design, after that a scheduling algorithm to set the content of sensor data flow. This scheduling algorithm is based on a double index evaluation method which include the variation of sensor data during assigned steps and the deviation between estimated value and real value of observation. Besides these, algorithm examples are provided as well.