Electro-hydraulic on-blade actuation system

A method comprising:

• generating a first linear force and an opposite second linear force along a chord length of a rotorcraft blade using a first linear motor and a second linear motor, respectively;
• hydraulically transmitting the first linear force and the second linear force to a first flexible bladder and a second flexible bladder, each of the first flexible bladder and the second flexible bladder attached to a surface of the rotorcraft blade;
• and
• expanding and contracting the first flexible bladder and the second flexible bladder, respectively, in response to the first linear force and the second linear force, respectively, to actuate the rotorcraft blade.

A rotorcraft blade actuation system comprising:

• a first linear motor to output linear force in a first direction in response to input;
• a second linear motor to output linear force in a second direction opposite the first direction in response to input;
• a first flexible bladder to attach to a first side of a rotorcraft blade;
• a second flexible bladder to attach to a second side of the rotorcraft blade, the second side opposite the first side;
• a first hydraulic unit connecting the first linear motor to the first flexible bladder to hydraulically transmit the linear force of the first linear motor to the first flexible bladder to actuate the rotorcraft blade;
• and
• a second hydraulic unit connecting the second linear motor to the second flexible bladder to hydraulically transmit the linear force of the second linear motor to the second flexible bladder to actuate the rotorcraft blade.