AMS-02中的TTCS系统及其监控策略研究

Study on supervise strategy implemented in TTCS of AMS-02

硅微条探测器热控制系统(Tracker thermo control system,TTCS)是阿尔法磁谱仪(Alpha magnetic spectrometer,AMS)内一个重要的子系统.其主要任务是将AMS-02内部硅微条探测器产生的热量传导到辐射板以排散到太空,并维持探测器内部温度高度稳定。为提高可靠性,TTCS运行过程监控采取了结合自保护机制的分层监控实现策略.首先介绍了TTCS系统总体架构及组成;在此基础上着重描述了TTCS监控硬件平台,并分析了分层监控策略的模型结构和功能分配,硬件实现的自保护机制(Health-guard)进一步提高了系统运行安全度,最后结合地面模拟测试平台,给出了系统运行测试结果.该监控策略已成功应用在TTCS原型件设计中.

As a key subsystem of AMS-02 （Alpha magnetic spectrometer）, tracker thermal control system （TTCS） is developed to transport heat dissipated by the silicon tracker electronics to radiators that radiate the heat to deep space and to keep the temperature of the silicon tracker invariable. To enhance the reliability, a hierarchical monitoring strategy is implemented in the electronic subsystem of TTCS to monitor the system working status. The general architecture and components of TTCS are presented at first. Then the hardware structure of the monitoring system is described briefly. And the hierarchical monitoring model is designed and analyzed in detail, in which the FPGA-implemented health-guard strategy further improves the safety of the TTCS. Lastly, based on the ESTP （earth simulation testing platform） system, test methods and results are given to show the reliable operation of TTCS. This strategy has been implemented successfully in prototype design.