恒温式量热计测爆热的稳健辨识方法  

Steady Identification Method of Explosion Heat Measurement by Isothermal Calorimeter

作　　者：杨杰 贺元吉 赵宏伟 陈华 韩秀凤 占君 YANG Jie;HE Yuan-ji;ZHAO Hong-wei;CHEN Hua;HAN Xiu-feng;ZHAN Jun(The 96901 Unit of the Chinese People′s Liberation Army, Beijing 100094,China)

机构地区：[1]中国人民解放军96901部队,北京100094

出　　处：《火炸药学报》2020年第4期442-450,共9页Chinese Journal of Explosives & Propellants

摘　　要：针对恒温法爆热经典测量方法存在测量时间长、出现系统故障易导致测量失败等问题,提出一种基于故障前数据辨识爆热的解决方案。首先建立了基于炸药瞬态反应假设的量热计传热学方程,解算得到内桶水温的变化规律;然后基于系统辨识的思想,给出了先辨识中间参数kNW/(cNmN)、u1、λ1、λ2,然后辨识目标参数TE(τM)、kNZ/cNmN、kNZ/cZmZ,再辨识修正温升与爆热的系统辨识方法,误差分析表明爆热的辨识值可稳健地收敛于经典值,氧化、燃烧等非瞬态反应对辨识精度的影响可忽略;最后,针对8个典型炸药样本爆热测量数据进行模拟分析并提出收敛时刻的试验判据。模拟结果表明,爆热的辨识值可在不超过3%的相对误差、1/2主末期时间的条件下快速、可靠地收敛于经典值,试验判据能可靠地判断爆热辨识值的收敛时刻,有效降低了系统故障导致测量失败的风险。In view of the problems of the classical measurement method of constant temperature explosion heat,such as long measurement time,system failure and so on,a solution of identifying explosion heat based on prefault data was proposed.Initially,the heat transfer equation of calorimeter based on the hypothesis of explosive transient response was established,and the change rule of water temperature in inner barrel was obtained after solving.Based on the thought of system identification,the system identification method was obtained,which firstly identifies the indirect parameters of kNW/(cNmN),u1,λ1,λ2,secondly identifies the target parameters of TE(τM),kNZ/cNmN,kNZ/cZmZ,thirdly identifies the correctional raising temperature and explosion heat.The error analysis shows that the identification value of explosion heat can converge to the classical value steadily,and the influence of non transient reaction such as oxidation and combustion on the identification accuracy can be ignored.Ultimately,8 kinds of typical explosive samples were simulated and analyzed,and the criterion of convergence time was proposed.The simulation results show that the identification value of detonation heat can converge to the classical value quickly and reliably under the condition of less than 3%relative error and 1/2 of the main and final stage.The test criterion can judge the convergence time of the identification value of detonation heat reliably and effectively reduce the risk of measurement failure caused by system fault.

关 键 词：物理化学 爆热 恒温式量热计 故障前数据 稳健辨识 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O159[理学—数学]