【摘要】 考虑到包装系统的复杂性,将包装系统的自由响应看作是多个模态的自由响应之和。采用基于奇异值分解的方法求出系统的阶数,消除自由响应中噪声的影响。采用高阶Prony方法可实现系统零点的聚集,同时采用前向预测和后向预测的方法,可把系统零点的聚集和噪声引起的零点的聚集区分开来。该方法可用于识别包装系统自由响应的各模态参数,为全面了解包装系统打下基础。更多还原

【Abstract】 The free response of packaging system was modeled as the sum of free response of multi-modal system taking the complexity of packaging system into account.The number of the orders was determined using the method based on singular value decomposition;the effect of the noise in the signal on parameters identification was eliminated.The signal zeros were clustered using Prony method with higher order;the signal zeros caused by noise and zeros caused by system medal can be separated using both forward and backward prediction.The method can be used to identify the modal parameters of packaging system,and provides detailed information of the packaging system.更多还原