Abstract：It is an important means to improve the anti-G ability of pilots to simulate the flight G-load

characteristics of aircraft in full envelop flight on the ground through centrifuge. With the great improvement of

maneuvering performance of manned aircraft，it is extremely difficult to accurately analyze its flight G-load

characteristics and convert them into centrifuge control instructions for continuous and effective flight G-load

characteristics simulation. The exact kinematics and dynamics equations of the aircraft were established，the

corresponding G-load characteristics of the aircraft in full envelop flight were analyzed in detail. Then the

mechanical and kinematic characteristics of the centrifuge were analyzed. Then，the transfer relationship between

the earth coordinate system，the aircraft body coordinate system and the pilot coordinate system were used to obtain the extraction method of the aircraft G-load characteristics to the centrifuge control command. Finally，for a threeaxis centrifuge with rotation，roll and pitch axis，the digital simulation experiments of flight attitude，G-load

calculation and centrifuge control commands for the full flight envelop were carried out. The experimental results

show that the proposed simulation method of G-load in full envelop flight of aircraft is feasible and effective.

      Key words：centrifuge；full envelop flight；G-load；three degrees of freedom