六自由度舰船运动模拟器随机海浪谱模拟  

Simulation to Random Ocean Wave Spectrum Using Six Degrees of Freedom Ship Motion Simulator

作　　者：皮阳军[1] 王宣银[1] 罗晓晔[2] 顾曦[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027 [2]杭州职业技术学院模具研究所,杭州310018

出　　处：《振动．测试与诊断》2010年第4期375-378,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:50375139);新世纪优秀人才支持计划资助项目(编号:NCET-04-0545);浙江大学流体传动及控制国家重点实验室开放基金资助项目(编号:GZKF-2007004)

摘　　要：为了测试随机海浪引起的振动对舰载设备性能和可靠性的影响,提出利用六自由度舰船运动模拟器复现随机海浪谱,对舰载设备进行环境模拟试验。针对六自由度舰船运动模拟器的实际情况,提出双闭环控制方法,利用实时正解代替输出传感器。研究了基于谱均衡和时域随机化的随机海浪谱驱动信号生成技术,并在六自由度舰船运动模拟器上进行试验。试验结果表明,该方法能在六自由度舰船运动模拟器上模拟随机海浪谱,频域复现精度达到±1 dB。In order to test the influence of the vibration induced by the random ocean waves on the performance and reliability of shipborne equipment,an environmental simulation experiment is conducted.In the experiment,a ship simulator with six degrees of freedom is used to generate the random wave spectrum,in which a double closed loop control system,including the time domain loop control and the frequency domain loop control,is designed to obtain the random wave spectrum,and the real time forward solution to the motion of the output of the simulator according to its input is used so as to omit the output measurement.The signal generation technology of random waves is studied based on the spectrum equalization and time domain randomization.Experimental results show that the ship motion simulator can generate the random wave spectrum at its output platform with the accuracy of ±1 dB in the frequency domain.

关 键 词：六自由度 模拟器 海浪谱 可靠性 随机振动 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置] TP391.76[自动化与计算机技术—控制科学与工程]