Method for filtering the signals arising from a sensor assembly comprising at least one sensor for measuring a vector physical field which is substantially constant over time and in space in a reference frame

A device for filtering the signals arising from a sensor assembly comprising at least one sensor for measuring a physical vector field which is substantially constant over time and in space in a reference frame, said sensor assembly being tied in motion to a moving frame, said moving frame moving in the reference frame, further comprising a processor operative to:

• apply a first transformation to the measurements of the sensor of the sensor assembly in which the measurements are provided in the moving frame to a pseudo reference frame, with the aid of a first change-of-frame operator (R(t)) by rotation between the moving frame and the pseudo reference frame;
• apply a filter to the measurements thus transformed in the pseudo reference frame;
• and
• apply a second transformation, the inverse of said first transformation, to the measurements filtered by said filter, from the reference frame to the moving frame, with the aid of a second change-of-frame operator (R−1(t)) by rotation between the pseudo reference frame and the moving frame, the inverse of said first operator.

A sensor processing unit for filtering the signals arising from a sensor assembly comprising at least one sensor for measuring a physical vector field which is substantially constant over time and in space in a reference frame, said sensor assembly being tied in motion to a moving frame, said moving frame moving in the reference frame, the sensor processing unit comprising a processor operative to:

• apply a first transformation to the measurements of the sensor of the sensor assembly in which the measurements are provided in the moving frame to a pseudo reference frame, with the aid of a first change-of-frame operator (R(t)) by rotation between the moving frame and the pseudo reference frame;
• apply a filter to the measurements thus transformed in the pseudo reference frame;
• and
• apply a second transformation, the inverse of said first transformation, to the measurements filtered by said filter, from the reference frame to the moving frame, with the aid of a second change-of-frame operator (R−1(t)) by rotation between the pseudo reference frame and the moving frame, the inverse of said first operator.