Passive calibration of a mechatronic device mated to a continuously variable planetary (CVP) hub

A method, performed by a processing server system, of calibrating a continuous variable planetary (CVP) system comprising a CVP hub that comprises a shift mechanism, wherein the shift mechanism comprises a shift driver element, the method comprising:

• continuously monitoring or obtaining a transmission speed ratio of the CVP hub during adjustment or preservation of the transmission speed ratio of the CVP hub;
• upon detecting that the transmission speed ratio reaches a particular speed ratio value, recording a corresponding mechanism position of the shift mechanism;
• calibrating the CVP system based on the particular speed ratio value, the corresponding mechanism position, and a known relationship between transmission speed ratios and positions of the shift mechanism;
• determining or verifying a full underdrive (FUD) position by iteratively reducing the transmission speed ratio from the particular speed ratio value until an onset of a backlash condition is detected;
• determining or verifying a full overdrive (FOD) position by iteratively increasing a motor current applied by an Automatic Hub Interface (AHI) until the transmission speed ratio stops increasing;
• and
• implementing the CVP system according to the determined FUD and the determined FOD positions, wherein the implementing of the CVP system comprises stopping or reversing a direction of the shift mechanism upon reaching the FUD position or the FOD position.

A method of calibrating a continuous variable planetary (CVP) system comprising a CVP hub that comprises a shift mechanism, the shift mechanism including a shift driver element, and a processing server system, the method comprising:

• detecting a CVP system state and executing a pre-prescribed sequence of motions of the shift mechanism including the shift driver element;
• upon completion of the pre-prescribed sequence of motions, prescribing a shift mechanism position value;
• continuously monitoring or obtaining of a transmission speed ratio and by way of comparison of a shift mechanism actual position value to a pre-defined relationship to speed ratio, determining an error;
• and
• offsetting the shift mechanism actual position value based on the error.