Patent ID: 8849460

Claim:
Method for controlling operation of an electro-mechanical transmission configured to transfer torque among an input member, a plurality of torque machines and an output member, the method comprising: determining an engine pulse torque; calculating a first motor torque pulse command based upon a first transfer function between the engine pulse torque and a torque command for a first torque machine and the engine pulse torque; calculating a second motor torque pulse command based upon a second transfer function between the engine pulse torque and a torque command for a second torque machine and the engine pulse torque; and controlling the first torque machine in response to the first motor torque pulse command and controlling the second torque machine in response to the second motor torque pulse command, wherein the first transfer function between the engine pulse torque and the torque command for the first torque machine is determined in accordance with the following relationship: G Te ⁢ ⁢ 2 ⁢ ⁢ Ta = - ( G Te ⁢ ⁢ 2 ⁢ ⁢ Ni + G Tb ⁢ ⁢ 2 ⁢ ⁢ Ni · G Te ⁢ ⁢ 2 ⁢ ⁢ Tb ) G Ta ⁢ ⁢ 2 ⁢ ⁢ Ni wherein G Te2Ta is a transfer function between the engine pulse torque and the torque command for the first torque machine; G Te2Ni is a transfer function between the engine pulse torque and input speed of the input member; G Tb2Ni is a transfer function between a torque command for the second torque machine and the input speed of the input member; G Te2Tb is a transfer function between the engine pulse torque and the torque command for the second torque machine; and G Ta2Ni is a transfer function between the torque command for the first torque machine and the input speed.