【摘要】 以MATLAB为工作平台,应用其仿真软件S imu link对穿浪艇的喷水推进系统进行了运动数学建模,再利用其模糊推理工具箱Fuzzy建立了模糊控制子系统的模型,然后根据航速差的大小判断准则实时分级施控。仿真结果表明,较之常规普通的只调节主机功率Ps的推进控制,通过分级调节主机功率Ps和喷口直径Da,能实现对喷水推进型穿浪艇更有效的控制,尤其是在当所需调节的速度变化量较小时,双变量的控制超调量更小、稳定更快、经济性更高。更多还原

【Abstract】 In this paper,MATLAB is chosen to serves as the work-platform whose simulation software package—Simulink is applied to construct a mathematical model of the motion of water-jet propulsion subsystem of a WPC.Then,FIS—MATLAB’s toolbox for fuzzy logic is employed to establish the model of fuzzy control subsystem.When realizing the intelligent control over the water-jet propulsion subsystem,it firstly calculate the difference between object speed and real-time actual speed,then,according to the size of speed difference,it automatically judges which variable to adjust—the power of engine machine P_s or the diameter of pump’s water-outlet D_a.In the course of simulating,this controller keeps judging between P_s and D_a which variable to adjust according to the changing size of real-time speed difference.The simulation results show that compared with conventional single-variable control which adjusts P_s only,this double-variable control performs more efficiently and economically.Especially when the size of speed difference is relatively small,adjusting D_a instead of adjusting P_smakes the speed steady more quickly with a smaller amount of excess control.更多还原