Vehicle monitoring strategy for detecting unintended acceleration during speed control

A powertrain system for a motor vehicle, comprising:

• at least one torque generating device coupled to a set of road wheels of the motor vehicle;
• a controller configured for detecting an unintended acceleration of the motor vehicle during a closed-loop speed control mode via execution of instructions, wherein the execution of the instructions causes the controller to:
• determine external forces collectively acting on the motor vehicle;
• calculate a desired acceleration of the motor vehicle using the external forces and a measured speed of the motor vehicle;
• determine an actual acceleration of the motor vehicle, which includes filtering a speed signal as a first actual acceleration value and/or measuring a second actual acceleration value using an inertial measurement unit (IMU) of the motor vehicle;
• during the closed-loop speed control mode, calculate an acceleration delta value as a difference between the desired acceleration and the actual acceleration;
• use the acceleration delta value to detect the unintended acceleration during the closed-loop speed control mode;
• and
• control a dynamic state of the motor vehicle in response to the unintended acceleration;
• and
• wherein the motor vehicle includes the IMU, and wherein the execution of the instructions causes the controller to determine the actual acceleration of the motor vehicle by filtering the speed signal as a first speed signal, differentiating the first speed signal as the first actual acceleration value, measuring the second actual acceleration value using the IMU, and calculating the actual acceleration as a weighted function of the first actual acceleration value and the second actual acceleration value.