Suspension damping control
AssigneeRivian IP Holdings, LLC
InventorsKarthik Mohan, Mark George Milne
Life of this patent
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Abstract
A vehicle includes a suspension system having a damping system that includes a plurality of dampers and a plurality of damper valves. The vehicle further includes one or more processors configured to determine energy content of an acceleration signal indicative of acceleration of the vehicle. The one or more processors are further configured to dynamically tune a cutoff frequency of a high-pass filter based on the energy content of the acceleration signal. The one or more processors are configured to filter, via the high-pass filter, a velocity signal derived from the acceleration signal to output a filtered velocity signal. The one or more processors are configured to control operation of the damping system based on the filtered velocity signal.
Claims20
A vehicle, comprising:
- a suspension system comprising a damping system including a plurality of dampers and a plurality of damper valves;
- and
- one or more processors configured to:
- determine energy content of an acceleration signal indicative of acceleration of the vehicle;
- dynamically tune a cutoff frequency of a high-pass filter based on the energy content of the acceleration signal;
- filter, via the high-pass filter, a velocity signal derived from the acceleration signal to output a filtered velocity signal;
- and
- control operation of the damping system based on the filtered velocity signal.
A method for dynamically filtering body velocities for a vehicle, comprising:
- determining energy content an acceleration signal indicative of acceleration of the vehicle;
- dynamically tuning a cutoff frequency of a high-pass filter based on the energy content of the acceleration signal;
- filtering, via the high-pass filter, a velocity signal derived from the acceleration signal to output a filtered velocity signal;
- and
- controlling operation of a damping system based on the filtered velocity signal.
A vehicle comprising:
- a suspension system comprising a damping system configured to output a damping force;
- and
- one or more processors configured to:
- obtain a velocity signal indicative of a velocity of the vehicle;
- select, via a lookup table, a gain value to apply to the damping force based on the velocity of the vehicle, the lookup table including a plurality of different velocity values and a plurality of different gain values, each respective gain value of the plurality of gain values assigned to a respective velocity value of the plurality of velocity values such that a non-linear relationship exists between the velocity values and the gain values;
- and
- control operation of the damping system to apply the selected gain value to the damping force.
Dependencies are inferred from the claim text.