两栖车辆非线性横摇动力学参数辨识研究  

Research on Dynamic Parameters Identification for Amphibious Vehicle Nonlinear Rolling Motion

作　　者：马新谋[1] 常列珍[2] 侯宏花[3] 

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]中北大学理学院,山西太原030051 [3]中北大学信息与通信工程学院,山西太原030051

出　　处：《中北大学学报（自然科学版）》2015年第2期134-139,共6页Journal of North University of China(Natural Science Edition)

基　　金：总装"十二五"预研项目;中北大学自然基金

摘　　要：为了估计两栖车辆非线性横摇阻尼项系数和非线性恢复项系数,进行了两栖车辆静水自由横摇衰减试验,采用差分格式分别计算横摇角速度和角加速度,最后采用最小二乘法来确定非线性阻尼项和恢复项系数.针对某两栖车辆的自由横摇衰减曲线,通过对测试曲线进行滤波和平滑,成功地辨识了非线性阻尼系数和非线性恢复力矩系数.结果表明:该方法仅根据自由横摇衰减曲线就可以辨识两栖车辆动力学参数,而且辨识精度高、计算方法简单.To identify the damping item parameters of nonlinear rolling motion and nonlinear restore item parameters of amphibious vehicle,and the free rolling motion decay experiment in calm water was car-ried out.Rolling motion angle velocity and angle acceleration were derived based on difference scheme, and then the least square method was adopted to determine nonlinear damping item and nonlinear restore item coefficients.For the free rolling motion decay curve of amphibious vehicle,the tested curve of am-phibious vehicle was filtered and smoothed,and then the nonlinear damping coefficients and nonlinear restore moment coefficients were successfully obtained.The obtained results show that this method which is only based on free rolling motion decay curve can identify the dynamics parameters of amphibi-ous vehicle,and the method is higher accuracy and simplified.

关 键 词：两栖车辆 非线性横摇 参数辨识 非线性阻尼 非线性恢复项 最小二乘法 

分 类 号：TJ811.6[兵器科学与技术—武器系统与运用工程]