US 12,291,915 B2 · Door motion controller with accelerometer compensation

Abstract

A system for opening or closing a closure member of a vehicle and an accelerometer calibration method are provided. The system includes an actuator assembly with an electric motor operably coupled to an extensible member for opening or closing the closure member. The system also includes an accelerometer configured to sense movement of the closure member and output an accelerometer signal. An actuator controller is coupled to electric motor and to the accelerometer and is configured to determine an adjusted accelerometer signal as the accelerometer signal adjusted using one of a plurality of predetermined compensation factors determined through an accelerometer calibration process temporally before installation of the accelerometer in the vehicle. The actuator controller then controls the opening or closing of the closure member using the electric motor based on the movement of the closure member as represented by the adjusted accelerometer signal.

Claims16

Dependent claims

A system for opening or closing a closure member of a vehicle comprising:

an actuator assembly comprising an electric motor operably coupled to an extensible member coupled to one of a body or the closure member for opening or closing the closure member;
an accelerometer configured to sense one of movement and orientation of the closure member and output an accelerometer signal corresponding to the one of movement and orientation of the closure member sensed, wherein the electric motor is controlled using an adjusted accelerometer signal;
and
a controller coupled to the electric motor and to the accelerometer, wherein the controller is adapted to receive the accelerometer signal, generate the adjusted accelerometer signal, and control the electric motor based on the adjusted accelerometer signal, wherein the controller is further configured to determine the adjusted accelerometer signal as the accelerometer signal adjusted using one of a plurality of predetermined compensation factors determined through an accelerometer calibration process temporally before installation of the accelerometer in the vehicle.

1 more element

An accelerometer calibration process for an accelerometer of a vehicle for sensing movement of a closure member, the process comprising the steps of:

mounting the accelerometer to a calibration fixture;
orienting the accelerometer in a plurality of angles using the calibration fixture;
obtaining an accelerometer signal when the accelerometer is oriented at each of the plurality of angles;
comparing the accelerometer signal to a predetermined expected accelerometer signal for each of the plurality of angles;
determining an operating irregularity of the accelerometer;
determining a plurality of predetermined compensation factors based on differences between the accelerometer signal and the predetermined expected accelerometer signal for each of the plurality of angles;
and
adapting a controller to compensate for the operating irregularity of the accelerometer.

5 more elements

Dependencies are inferred from the claim text.

Door motion controller with accelerometer compensation

Life of this patent

Door motion controller with accelerometer compensation

Life of this patent

Abstract

Claims16