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To analyze the spring disturbance torque caused by motional cable hess in a stabilized platform,the Kirchhoff theory based cable hess model has been previously developed to dynamically simulate the motional cable hess.In this paper,this model was validated by comparing the simulation results with the experiment results ( both the spring force and the deformed profile of the motional cable hess).In the experiment,a special optical measuring instrument based on binocular vision was developed and the motion and deformation of cable hess were measured.A simplified stabilized platform system was constructed,and the absolute value of spring disturbance force during the motion of this simplified frame was obtained by using a force gauge (0.02 N precision).The physical parameters of experimental specimen were also measured.The experimental and simulated results showed good agreement.These results should be useful for better motional cable hess layout design and reliable evaluation of the spring disturbance torque.