The main purpose of this type of grouping is to enable very high reduction ratios to be achieved, while optimizing overall dimensions and mass. The structural diagram (figure 15) applies to both a gearbox and a speed multiplier, with :Nm0 /Ns0 = i ror Ns0 /Nm0 = i m with i > 1
If each elementary gearbox has a transmission ratio of value ui (i Î 1, 2, ..., n ), the kinematic law is written : i = u1u 2 u 3... un
the overall ratio is equal to the product of the elementary ratios.
If, in a dynamic study, we...
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