短距离起飞加速度对飞行员操作影响的分析

Acceleration overlord during short-distance takeoff might affect the operation performance of pilot. To avoid potential risks, a pilot-cockpit multi-rigid-body model was established to simulate the man-machine dynamic response under chest-to-back (Gx) acceleration loads. Firstly, using 3D CAD software, the multi-body pilot dummy was established according to the 3% male body measurement data. Also, the cockpit model including human-seat and control system (throttle stick and steering axle) was established according to the design parameters. The dynamic response between pilot and control sticks under a standard simulated Gx acceleration curve is simulated using the multibody dynamics simulation software ADAMS. The simulation result shows that the overload acceleration can transmit through the human body to the sticks. The transmission force generated by 5G acceleration acting on the steering axle and throttle stick are 128 N and 211 N, both of which have exceeded the designed effective force threshold, leading to a potential risk of misoperation. Further, considering the simulation results and the existing foreign fighter design, we proposed an effective posture for the pilot to avoid misoperation, which was validated by the simulation in this paper. In conclusion, the proposed method provides an effective technology to avoid the misoperation in short-distance takeoff. The results would give a reference for the man-machine safety design.