故障树分析法在SL-IE型放射治疗模拟机电气系统革新中的应用

摘要

Objective To discuss the practicability of application of fault tree analysis in innovation to electrical system of SL-IE radiotherapy simulator.Methods The structure and principle of the electrical system were analyzed,the fault tree for the electrical system was built,and the qualitative analysis and quantitative analysis to the fault tree were made.The electrical system was innovated with effective redundant method,and the qualitative analysis and quantitative analysis were made after innovation.Theoretical analysis and the actual validation were made for the fault tree of electrical system after innovation.Finally,several notes were provided for the innovation to the similar medical equipments.Results The fault tree analysis method was applied to innovating the electrical system,and theoretical analysis indicated that the failure probability to total system reduced obviously.Actually,the actual effect after innovation also validated the correctness of the theoretical analysis.Conclusion Application of fault tree analysis in innovation to electrical system of SL-IE radiotherapy simulator is practical.But,the selection to the innovation event,the change to maintainence after innovation and the event to innovate carefully should be paid attention to.%目的:探讨故障树分析法应用于SL-IE型放射治疗模拟机电气系统革新的可行性.方法:分析SL-IE型放射治疗模拟机的电气系统结构和原理,建立放射治疗模拟机电气系统故障树,并对故障树进行定性和定量分析.采用有效冗余设计方法进行革新,并对革新后的故障树进行定性和定量分析,再对革新后限位器进行实际验证.结果:革新后放射治疗模拟机系统的故障率显著降低,验证了理论计算的正确性.结论:故障树分析法应用于SL-IE型放射治疗模拟机电气系统的革新是可行的,但要注意革新事件的选择、革新后维护变化,谨慎革新的事件.