摘要
在对弹引系统动态特性详细研究的基础上,通过分析弹丸过载和引信过载的差异,建立弹引系统传递函数的数学模型。搭建弹引系统锤击试验平台,根据系统可辨识性要求,采用有限元法对试验平台中力锤进行模态分析,确定力锤的选型。利用该试验平台,在弹丸、引信不同拧紧力矩条件下,测取单位脉冲激励时弹引系统的输出响应。基于系统辨识理论的输出误差模型,提出弹引系统传递函数算法,并编制相应的计算程序。最后以某弹引系统锤击试验的数据为例,计算出该弹引系统的频域传递函数,并在相同的激励环境下对理论计算的输出响应与实测试验结果进行比对,结果表明所提出的弹引系统传递函数系统辨识算法及输出误差模型符合实际情况,达到了研究目的。
The differences of the bullet overload and the fuze overload are analyzed based on the study on the dynamic characteristics of bullet-fuze system, then the mathematic model of the bullet-fuze system transfer function is established. According to the demand of the system identifiability, the hammer test platform of bullet-fuze system is built, and the lectotype of the hammer is determined by the modal analysis of the finite element method. Using the test platform, output responses of bullet-fuze system excited by unit impulse under different tightening torque conditions are measured. The transfer function algorithm of bullet-fuze system is presented based on the output error model of the system identification, and the corresponding calculation program is compiled. At last the transfer function is calculated, and output responses calculated and measured results are compared in the same motivation environment. The results show that the system identification algorithm of the bullet-fuze system transfer function and the output error model are credible, and the calculation accuracy is perfect.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2008年第3期200-204,共5页
Journal of Mechanical Engineering
基金
武器装备预研基金(5140C9384029389C475)。
关键词
弹引系统
传递函数
系统辨识
Bullet-fuze system Transfer function System identification
