Study on Pitch Reduction of Self-Control Interceptor Under Random Seas
Aiming at the problem of pitch reduction of transitional boat,a random wave model was es-tablished for a transitional boat.Based on the potential flow theory,the wave interference model and ship motion model were obtained,and the lift and moment models of the closure plate of the target boat were calculated by CFD method.PID controller and sliding mode robust controller were de-signed,and open-loop and closed-loop control systems were built respectively,and the motion calcula-tion results were compared.Under the actual constraints,the closed-loop system with two controllers shows different degrees of pitch reduction compared with the open-loop system,in which the pitch amplitude can be reduced by 34％in the third-class sea state and 8％in the fifth-class sea state when the sliding mode controller is used.The automatic damping system of the closure plate can effectively reduce the pitching motion of the transitional boat,and the sliding mode robust controller is better than the PID controller in the third-class sea conditions,and it also has good damping effect in the fourth and fifth-class sea conditions.
interceptorpitch reductionsliding mode controlPID controlCFDrandom seas
万方数据
维普
