周期变推力控制滑行艇海豚运动的仿真分析

Simulation and analysis for porpoising of planing vessels by periodic force control

针对滑行艇高速运行下出现的海豚运动,研究了周期变推力对滑行艇纵向运动的控制.通过仿真,对不同艇体参数下发生海豚运动的风险进行了评估.开环仿真验证了周期变推力控制海豚运动原理,并得到了周期变推力影响滑行艇纵向运动的规律.通过检测滑行艇纵摇角信息,反馈给周期变推力形成闭环控制,使周期变推力施加的时机更精确,进而优化了减纵摇的效果.利用柴油机变转速控制仿真,验证了变推力控制海豚运动的应用性.仿真结果验证了所提方法的有效性,周期变推力控制能够有效抑制海豚运动,同时不损失滑行艇运行速度,保证了滑行艇运行的安全性和高效性.

This paper focused on periodic force control for vertical motion of planing vessels, according to porpoising of planning vessels running at high speed. The risk of porpoising was evaluated based on simulation of different pa- rameters. The open-loop simulation of periodic force control was shown to verify its rationality, and several rules a- bout how periodic force affects the pitch motions were obtained. The planning vessel＂ pitch angle was tested and then the information was feed back to the periodic force control in a closed-loop, which made the time of applying periodic force more accurate, thus made the mitigation of porpoising more effective. A changeable-speed control sys-tem simulation of a diesel engine was proposed to verify its application. The simulation results demonstrate the effec- tiveness of the suggested approach. Periodic force control has effective mitigation for porpoising without loss of run-ning speed, which ensures safety and high effectiveness of the vessels.