Aiming at the functional safe demands of programmable electronic systems in IEC61508, this paper proposes the safe design of Analog Input (AI) module based on ARM Microprocessor.
根据IEC61508对可编程逻辑器件功能安全的要求，提出基于ARM的模拟量输入模块的安全设计。
The model of switch calculated is built aiming to number 42 double arm elastic bending point rail, system analysis is made for switching force and inadequate displacement.
随着列车提速和客运专线的建设，道岔的设计也由静态设计向动态设计转变，弹性可弯尖轨及心轨的扳动力及不足位移是道岔设计中的关键问题。
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