Load Sharing Multiobjective Optimization Design of a Split Torque Helicopter Transmission

Table 3

The values of design parameters and objective functions of solutions 1#~4#.

Parameters	1#	2#	3#	4#
First stage
Tooth number	28/119	26/91	26/105	26/105
Module /mm	1.538	1.861	1.683	1.694
Gear ratio	4.25	3.5	4.038	4.038
Helix angle /(°)	18.900	14.296	18.196	17.402
Second stage
Tooth number	22/131	22/159	22/138	22/138
Module /mm	3.270	2.981	3.095	3.119
Gear ratio	5.955	7.227	6.273	6.273
Shaft angle (°)	114.741/47.439	133.641/45.018	111.615/45.617	113.589/45.899
Phase difference	16.558/8.411	19.295/9.145	16.698/7.559	16.839/7.709
L-S-C RMS	1.287	1.381	1.317	1.318
Total mass /kg	39.066	40.516	36.338	37.088
Total safety factor	9.279	10.582	9.253	9.367