在生產設計過程中。為賦予產品可靠性而進行的工作稱為可靠性設計。在整個設計過程中，把可靠性問題考慮進去，比產品投入生產以后發(fā)現(xiàn)不可靠因素進行改進要好的多。因為后者往往要在改變工夾模具、材料、工藝等方面付出很大的代價。
可靠性設計的主要內容包括制訂可靠性指標，可靠性預測，可靠性分配以及與提高可靠性有關的具體設計工作和可靠性審查。
對可靠性特征量的要求稱為可靠性指標。制訂可靠性指標的工作包括確定指標項目和指標數(shù)值。一種產品的可靠性要求常常需要用幾項指標來反映。指數(shù)分布失效的可靠性指標可用失效率或MTBF來表示；對于早期失效和耗損失效宜用可靠度和可靠壽命來表示；對于控制裝置等可修復產品常用的還有有效度，即產品能工作的時間與能工作時間加不能工作時間之和的比值來表示。同一產品的可靠性特征量因條件、時間、功能而不同，因此在規(guī)定可靠性指標時必須明確是對應于什么條件、時間、功能的指標。例如對于接觸可靠性指標必須規(guī)定負載電壓、電流；規(guī)定偶然故障失效率必須同時規(guī)定偶然失效期延續(xù)時間即有效壽命。
Opto 22 SNAP-PS5-24DC Logic Power Supply
OPTO 22 SNAP 1/0 IDC5 4 CHANNEL DC INPUT
OPTO 22 SNAP-AIVRMS SNAP 2-Ch 0-250 V RMS AC/DC Analog Input Module
OPTO 22 SNAP I/O SNAP IDC5 4-Channel DC Input Module
OPTO 22 SNAP-PS5-24DC POWER SUPPLY
NEW OPTO 22 SNAP I/O 4 CHANNEL DC OUTPUT SNAP-ODC5SRC
OPTO 22 SNAP-ODC5SNK 4 CHANNEL DC OUTPUT MODULE
OPTO 22 SNAP-IDC5D 4 CHANNEL DC INPUT MODULE
OPTO 22 SNAP I/O Part No. SNAP IDC5 4 Channel DC Input
NEW OPTO 22 SNAP I/O SNAP-IDC5 4 CHANNEL DC INPUT 10-32VDC 5VDC LOGIG
OPTO 22 SNAP I/O SNAP IDC5 4-Channel DC Input Module
Opto 22 SNAP-0DC5SRC Solid State Relay I/O Module ! NEW !
From Canada
Opto 22 SNAP-PS5-24DC Logic Power Supply
OPTO 22 SNAP I/O Part No. SNAP IDC5 4 Channel DC Input
NEW OPTO 22 SNAP I/O 4 CHANNEL DC OUTPUT SNAP-ODC5SRC
Opto 22 SNAP I/O SNAP-ODC5SRC 4 Channel DC Output
OPTO 22 SNAP-AIVRMS SNAP 2-Ch 0-250 V RMS AC/DC Analog Input Module
Opto 22 SNAP I/O SNAP-IDC5FM 4 Channel DC Input
OPTO 22 SNAP I/O 4-CHANNEL DC OUTPUT MODULE SNAP-ODC5SRC *NEW*
NEW OPTO 22 Snap I/O SNAP-IDC5D 4 Channel DC Input
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