Table 3.
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Rules for calculating the Main Technical Parameters scores

SubcriteriaScoreDescription
Transmission efficiencySa1={0.2,η<0.5 1.74(η−0.5)+0.2,0.5≤η<0.96 1,0.96≤η η is the theoretical transmission efficiency of the scheme at a transmission ratio of 1200 ± 200
Ratio rangeSa2={0.2,(imax,imin).∉(−2000,800) min(imax,2000)−max(imin,800)1200,imax〈2000 or imin〉800  1,(imax,imin).∈(−2000,800) 
Operating temperature rangeSa3={0.2,tmax∉[20,100] 0.6,60<imax≤100  1,20≤imax≤60 tmax is the maximum operating temperature in a room-temperature environment
Dimensions and weightsSa4={0.2,RK=γ 1−0.8×(RK−1)γ,1<RK<γ 1,RK=1 RK is the ranking of the score of the gearbox in terms of volume and weight, and  γ is the number of schemes
SubcriteriaScoreDescription
Transmission efficiencySa1={0.2,η<0.5 1.74(η−0.5)+0.2,0.5≤η<0.96 1,0.96≤η η is the theoretical transmission efficiency of the scheme at a transmission ratio of 1200 ± 200
Ratio rangeSa2={0.2,(imax,imin).∉(−2000,800) min(imax,2000)−max(imin,800)1200,imax〈2000 or imin〉800  1,(imax,imin).∈(−2000,800) 
Operating temperature rangeSa3={0.2,tmax∉[20,100] 0.6,60<imax≤100  1,20≤imax≤60 tmax is the maximum operating temperature in a room-temperature environment
Dimensions and weightsSa4={0.2,RK=γ 1−0.8×(RK−1)γ,1<RK<γ 1,RK=1 RK is the ranking of the score of the gearbox in terms of volume and weight, and  γ is the number of schemes
Table 3.
Open in new tab

Rules for calculating the Main Technical Parameters scores

SubcriteriaScoreDescription
Transmission efficiencySa1={0.2,η<0.5 1.74(η−0.5)+0.2,0.5≤η<0.96 1,0.96≤η η is the theoretical transmission efficiency of the scheme at a transmission ratio of 1200 ± 200
Ratio rangeSa2={0.2,(imax,imin).∉(−2000,800) min(imax,2000)−max(imin,800)1200,imax〈2000 or imin〉800  1,(imax,imin).∈(−2000,800) 
Operating temperature rangeSa3={0.2,tmax∉[20,100] 0.6,60<imax≤100  1,20≤imax≤60 tmax is the maximum operating temperature in a room-temperature environment
Dimensions and weightsSa4={0.2,RK=γ 1−0.8×(RK−1)γ,1<RK<γ 1,RK=1 RK is the ranking of the score of the gearbox in terms of volume and weight, and  γ is the number of schemes
SubcriteriaScoreDescription
Transmission efficiencySa1={0.2,η<0.5 1.74(η−0.5)+0.2,0.5≤η<0.96 1,0.96≤η η is the theoretical transmission efficiency of the scheme at a transmission ratio of 1200 ± 200
Ratio rangeSa2={0.2,(imax,imin).∉(−2000,800) min(imax,2000)−max(imin,800)1200,imax〈2000 or imin〉800  1,(imax,imin).∈(−2000,800) 
Operating temperature rangeSa3={0.2,tmax∉[20,100] 0.6,60<imax≤100  1,20≤imax≤60 tmax is the maximum operating temperature in a room-temperature environment
Dimensions and weightsSa4={0.2,RK=γ 1−0.8×(RK−1)γ,1<RK<γ 1,RK=1 RK is the ranking of the score of the gearbox in terms of volume and weight, and  γ is the number of schemes
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