Wash article entrapment detection for laundry washing machines

A method for detecting entrapment of a wash article within a laundry washing machine comprising a tub configured to hold a quantity of wash liquid, a drum rotatably mounted within the tub and configured to hold a quantity of wash articles, a door movable between an open position and a closed position, a bellows seal configured to seal the door to the tub when the door is in the closed position, and a drum motor configured to rotate the drum, the method comprising:

• receiving an instruction to begin a laundry washing cycle;
• operating the drum motor to accelerate the drum from to a target rotation speed;
• and
• upon reaching the target rotation speed, performing a first entrapment determination process comprising:
• performing a first plurality of rotations at the target rotation speed,
• determining a respective maximum motor torque value and a respective minimum motor torque value for each of the first plurality of rotations,
• determining at maximum torque distribution characteristic value of the respective maximum torque values of the first plurality of rotations,
• determining at minimum torque distribution characteristic value of the respective minimum torque values of the first plurality of rotations,
• comparing a greater of the maximum torque distribution characteristic value and the minimum torque distribution characteristic value to a first predetermined threshold value,
• upon determining that the greater of the maximum torque distribution characteristic value and the minimum torque distribution characteristic value is above the first predetermined threshold value, performing a correction operation to address an entrapment condition, and
• upon determining that the greater of the maximum torque distribution characteristic value and the minimum torque distribution characteristic value is below the first predetermined threshold value, proceeding with the laundry washing cycle.