Design of Testing Period for Reliability Assessment of Numerical Control Machine Tools Considering Working Conditions

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/mpe/volume-2018/1962064/figures/1962064.fig.002a.svgz" name="1962064.fig.002a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Lower limit of interval estimations of MTBF under different covariate</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/mpe/volume-2018/1962064/figures/1962064.fig.002b.svgz" name="1962064.fig.002b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Lower limit of interval estimations of MTBF under different covariate</td></tr></table>

Mathematical Problems in Engineering

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Figure 2: Design of Testing Period for Reliability Assessment of Numerical Control Machine Tools Considering Working Conditions 