Open roof assembly for use in a vehicle and a method for operating same

A method of operating an open roof assembly, the open roof assembly comprising a moveably arranged closure member for selectively covering or at least partially exposing an opening in a vehicle roof and a drive system operatively coupled to the closure member for moving the closure member along a motion trajectory,

• wherein the drive system comprises an electric motor and a control unit operatively coupled to the electric motor for controlling operation of the electric motor and for receiving at least one first drive system variable,
• wherein the control unit comprises
• a mathematical model describing at least a part of the drive system;
• model parameters as used in the mathematical model;
• and
• a motion reference field describing a reference value of a second drive system variable as a function of a position of the closure member along its motion trajectory;
• and
• the method comprising the control unit performing steps of
• a. updating the model parameters based on the received at least one first drive system variable;
• b. determining a value of the second drive system variable using the mathematical model;
• c. determine a comparison value by comparing the value of the second drive system variable and a corresponding reference value of the motion reference field;
• and
• d. detect presence of an obstruction when the comparison value lies outside a predetermined value range.

A non-transitory computer readable medium containing computer readable and executable instructions for instructing a computer processor to perform a method of operating an open roof assembly, the open roof assembly comprising a moveably arranged closure member for selectively covering or at least partially exposing an opening in a vehicle roof and a drive system operatively coupled to the closure member for moving the closure member along a motion trajectory,

• wherein the drive system comprises an electric motor and a control unit operatively coupled to the electric motor for controlling operation of the electric motor and for receiving at least one first drive system variable,
• wherein the control unit or instructions comprises
• a mathematical model describing at least a part of the drive system;
• model parameters as used in the mathematical model;
• and
• a motion reference field describing a reference value of a second drive system variable as a function of a position of the closure member along its motion trajectory;
• and
• the method comprising:
• a. updating the model parameters based on the received at least one first drive system variable;
• b. determining a value of the second drive system variable using the mathematical model;
• c. determining a comparison value by comparing the value of the second drive system variable and a corresponding reference value of the motion reference field;
• and
• d. detecting presence of an obstruction when the comparison value lies outside a predetermined value range.