Aircraft modal suppression system

A data processing system for aircraft modal suppression, the system comprising:

• one or more processors;
• a memory;
• and
• a plurality of instructions stored in the memory and executable by the one or more processors to:
• receive a plurality of signals from on-board inertial sensors of an aircraft, the plurality of signals corresponding to motions of one or more portions of the aircraft;
• utilize the plurality of signals to generate a plurality of observers, each observer comprising one or more estimated states of a respective one of one or more control surfaces of the aircraft;
• utilize the observers to determine control law commands for the one or more control surfaces of the aircraft, wherein the control law commands are configured to reduce vibration of the aircraft that is induced by a combination of lateral wind gusts and non-uniform vertical wind gusts;
• and
• control the one or more control surfaces of the aircraft in accordance with the control law commands.

A method of reducing aircraft vibrations induced by wind gusts, comprising:

• measuring motions of an aircraft including at least one lateral acceleration, a roll rate, and a yaw rate, wherein the aircraft includes ailerons and flaperons;
• using the measured motions of the aircraft to estimate vibrations along a body of the aircraft induced by a combination of lateral wind gusts and non-uniform vertical wind gusts;
• and
• compensating for the estimated vibrations by moving at least one of the ailerons and the flaperons.