Table 9 FMECA information indexes of drilling device

λ₁₃

Failure frequency of subsystems

0.004

E₁₃

\(\tilde{e}_{13,1} = (3,3,4,5)\), \(\tilde{e}_{13,2} = (3,4,4,5)\)

9.393

D₁₃

\(\tilde{d}_{13,1} = (2,3,4,4)\), \(\tilde{d}_{13,2} = (1,2,3,4)\)

5.556

RPN₁₃

OPR_13,1 = 2, OPR_13,2 = 1

38.423

C₁₃

‒

9.891

CR₁₃

n_13,1 = 1, n_13,2 = 1, n₁₃ = 2, β_13,1 = 0.2, β_13,2 = 0.4

0.6

T₁₃

T_13,1 = 2, T_13,2 = 1

3

F₁₃

\(F_{13,1}^{11} = 300\), \(F_{13,1}^{21} = 30\), \(F_{13,1}^{31} = 500\)\(t_{13,1}^{11} = 2\), \(F_{13,1}^{41} = 200\), \(F_{13,1}^{51} = 100\), \(t_{13,1}^{21} = 2\)

\(F_{13,2}^{11} = 300\), \(F_{13,2}^{21} = 30\), \(F_{13,2}^{31} = 500\)\(t_{13,2}^{11} = 1\), \(F_{13,2}^{41} = 0\), \(F_{13,2}^{51} = 80\), \(t_{13,2}^{21} = 1\)

2970