Identification of Contamination Control Strategy for Fluid Power System Using an Inexact Chance-Constrained Integer Program

Table 2

Particle diameters, initial contamination, and contamination tolerance levels.

Contaminant particle divisions	1	2	3	4	5	6	7	8	9
Range of diameters (μm)	0~5	5~10	10~15	15~20	20~25	25~30	30~50	50~100	100~
Initial contamination level 𝑁^±01m (number of particles/mL)	[1000,1500]	[300,500]	[150,250]	[60,100]	[30,50]	[10,15]	[6,10]	[2.5,4.0]	[0.5,0.8]
Contamination tolerance level 𝑆^±1nm (number of particles/mL)
𝑞1	[4000,6000]	[1200,2000]	[600,1000]	[250,400]	[140,230]	[50,67]	[30,43]	[12,17]	[5,7]
𝑞2	[4300,6300]	[1300,2100]	[680,1080]	[300,460]	[120,200]	[40,60]	[25,40]	[10,15]	[4,6]
𝑞3	[4600,6500]	[1500,2200]	[720,1200]	[350,530]	[160,260]	[60,71]	[35,45]	[14,19]	[6,8]
𝑞4	[8000,12000]	[2400,4000]	[1200,2000]	[500,800]	[240,400]	[80,120]	[50,80]	[20,30]	[8,12]
Contamination tolerance level 𝑆^±2nm (number of particles/mL)
𝑞1	[2000,3000]	[600,1000]	[300,500]	[120,200]	[60,100]	[20,30]	[12,20]	[5,8]	[2,3]
𝑞2	[2100,3100]	[700,1200]	[380,560]	[150,210]	[70,105]	[30,35]	[16,23]	[7,10]	[3,4]
𝑞3	[2200,3200]	[800,1280]	[450,630]	[180,220]	[80,110]	[40,40]	[20,26]	[9,12]	[4,5]
𝑞4	[4000,6000]	[1200,2000]	[600,1000]	[240,400]	[120,200]	[40,60]	[24,40]	[10,16]	[4,6]