Multirod fluid actuator arrangement

A control surface multirod actuator arrangement comprising:

• a first and a second multirod actuator configured to move a first set of piston rods, wherein the first and second multirod actuator are coupled to primary control surfaces;
• a third multirod actuator configured to move a second set of piston rods, wherein the third multirod actuator is coupled to a secondary control surface;
• wherein each piston rod of said first and second set of piston rods being configured to be individually engaged or disengaged by first, second or third set of engagement and disengagement devices;
• a control unit configured to control a motion of the first set of piston rods in a first motion mode and to control a motion of the second set of piston rods in a second mode,
• wherein the first motion mode comprises motion of primary control surfaces, wherein the first motion mode constitutes at least one of an aircraft start mode, a landing mode, a climb mode, or a turn mode;
• moving at least one piston rod of the first set of piston rods and clamping in parked position at least one piston rod of the second set of piston rods;
• clamping of at least one piston rod of the first set of piston rods in parked position and the clamping of at least one piston rod of the second set of piston rods in parked position;
• clamping in parked position at least one piston rod of the first set of piston rods and moving at least one piston rod of the second set of piston rods,
• wherein the first set of piston rods are clamped by a first and second piston body of the respective first and second multirod actuator, wherein the first piston body is parked against a head inner wall of the first multirod actuator and the second piston body is parked against a head inner wall of the second multirod actuator in a loitering mode.

A non-transitory computer storage medium storing computer-executable instruction adapted for controlling the motion of a control surface multirod actuator system, comprising:

• a first and a second multirod actuator configured to move or clamp around a first set of piston rods, wherein the first and second multirod actuator are coupled to primary control surfaces;
• a third multirod actuator configured to move or clamp around a second set of piston rods, wherein the third multirod actuator is coupled to a secondary control surface;
• a control unit configured to control a motion of the first set of piston rods in a first motion mode and to control a motion of the second set of piston rods in a second motion mode;
• wherein the first motion mode comprises motion of primary control surfaces, wherein the first motion mode constitutes at least one of an aircraft start mode, a landing mode, a climb mode, or a turn mode;
• wherein said stored computer-executable instructions readable code causing the control unit to perform a method comprising:
• moving at least one piston rod of the first set of piston rods and clamping in parked position at least one piston rod of the second set of piston rods;
• clamping in parked position at least one piston rod of the first set of piston rods and clamping in parked position at least one piston rod of the second set of piston rods;
• and
• clamping in parked position at least one piston rod of the first set of piston rods and moving at least one piston rod of the second set of piston rods,
• wherein the first set of piston rods are clamped by a first and second piston body of the respective first and second multirod actuator, wherein the first piston body is parked against a head inner wall of the first multirod actuator and the second piston body is parked against a head inner wall of the second multirod actuator in a loitering mode.