dedicated accelerometers 62 a 62 b in fig6 a amp 7 a at the pilot station 50 a and at the aft galley 50 b are used as the main feedback sensors for the fore and aft lateral body bending control 24 25 in fig2 respectively each sensor passes through its own modal suppression algorithms the fore body lateral control algorithm 24 and the aft body lateral control algorithm 25 respectively before they are summed to form a modal rudder command 33 again calibrated airspeed 18 is used for gain scheduling the torsional body mode control algorithm 26 uses the iru lateral acceleration 9 to provide u201c body torsion u201d structural information so that an anti symmetric elevator command 34 may be generated to control this mode the torsional body modal suppression filter 26 is designed to provide the proper gain and phase relationship such that anti symmetric elevator would be deployed at the right moment with the right amplitude calibrated airspeed 18 is used for gain scheduling the vertical wing mode control algorithm 27 uses the iru body pitch rate 12 to provide u201c symmetric wing bending u201d structural information so that a symmetric flaperon command 35 may be generated to.