测控设备运行效能评估建模及分析

Modeling and Analysis of Operation Effectiveness Evaluation for TT&C Equipment

近年来,在轨航天器数量急剧增长,测控设备类型更加多样,测控需求种类愈发繁多,使航天测控成为一个复杂的系统工程问题。当前,针对航天测控网设备的日常运行效能的评估仍处于人工统计数据和片面计算单一指标的阶段,这缺乏系统有效的评估模型,且难以综合反映测控网设备的实际运行效能。为科学准确分析测控网设备的日常运行情况,从时段、日和月的不同时间度量尺度出发,立足于测控设备的负荷率、空闲可用率和空闲碎片率等评估指标,首先构建了航天测控网不同测控区域的平均运行效能评估模型。然后,建立了各区域中负荷时长贡献度最大的测控设备的日常运行效能评估模型。最后,进一步构建了适用于航天测控设备运行效能评估的运行效能显著性差异的统计检验计算式,能有效检验不同测控区域或不同测控设备在同一效能评估模型上是否存在明显差异。在仿真算例中对航天测控网中的西部、东部、南部和北部四大测控区域中21套测控设备的运行数据进行了评估与分析,为进一步提高测控网设备在航天测控系统中所发挥的效力提供科学有效的评估手段支撑。

In recent years,the number of spacecraft has rapidly increased,the types of telemetry track and command(TT&C)equipment have become more diverse,and the variety of TT&C requirements has become increasingly diverse,making TT&C become a complex system engineering problem.At present,the evaluation of the daily operation effectiveness of TT&C equipment is still in the stage of manual statistical data and one-sided calculation of a single index,which lacks a systematic and effective evaluation model and is difficult to comprehensively reflect the actual operation effectiveness of TT&C equipment.In order to scientifically and accurately analyze the daily operation effectiveness for TT&C equipment,the evaluation modeling is studied from different time scales of time period,day and month in this paper.Based on the evaluation indexes such as load rate,idle availability rate and idle fragment rate,the evaluation model of average operation effectiveness for TT&C equipment in the geographical region is first constructed.Second,the evaluation model of daily operation effectiveness for the TT&C equipment with the largest contribution of load duration in each region is established.Finally,a significance statistical test calculation formula for the operation effectiveness of TT&C equipment is further constructed,which can effectively test whether there are significance in the same evaluation model between different TT&C regions or different TT&C equipment.In addition,the operation data of 21 TT&C equipment in the west,east,south and north of the space TT&C network are used for operation effectiveness evaluation and analysis in the simulation case,which provides scientific and effective evaluation means support for further improving the effectiveness of TT&C equipment in space TT&C system.