Method and apparatus for operating a multi-mode transmission system under dynamic conditions

摘要

A method for controlling a multi-mode transmission system employing torque machines under dynamic operating conditions includes calculating a phase shift between a control parameter of one of the torque machines and a response parameter of the multi-mode transmission system under dynamic operating conditions, comparing the calculated phase shift and an expected phase shift, and executing remedial action when the calculated phase shift exceeds a threshold associated with the expected phase shift.

主权项

1. A method for controlling a multi-mode transmission system employing torque machines under dynamic operating conditions, comprising:
calculating a phase shift between a control parameter of one of the torque machines and a response parameter of the multi-mode transmission system under dynamic operating conditions, comprising;
monitoring a torque command for the torque machine and a rotational speed of the torque machine under the dynamic operating conditions;determining a resonant frequency of the multi-mode transmission system;filtering the torque command and the rotational speed around the resonant frequency of the multi-mode transmission system;determining a phase angle between said filtered torque command and said filtered rotational speed;normalizing said phase angle based upon an expected phase relationship between the torque command and the rotational speed; anddetermining the phase shift based upon the normalized phase angle; comparing the calculated phase shift and an expected phase shift; and executing remedial action when the calculated phase shift exceeds a threshold associated with the expected phase shift, including controlling the torque machine to operate with an adjusted control parameter.