CAJ | 학술논문

逆动态方法是一种有效的实时反应性测量方法,此方法实现的关键是准确地计算中子信号的导数和积分,导数对于测量信号中的噪声很敏感,而噪声是不可避免的.论文研究了几种降低噪声影响的方法,包括低通滤波器和平滑样条函数的方法,并进行了数值仿真,证明平滑样条函数能有效地消除测量信号中的噪声,直至5%信噪比的信号都能取得较好的结果,并且不产生延迟.因此,消除噪声的算法是逆动态方法实现的一个关键基础,平滑样条函数是-个较好的选择.
역동태방법시일충유효적실시반응성측량방법,차방법실현적관건시준학지계산중자신호적도수화적분,도수대우측량신호중적조성흔민감,이조성시불가피면적.논문연구료궤충강저조성영향적방법,포괄저통려파기화평활양조함수적방법,병진행료수치방진,증명평활양조함수능유효지소제측량신호중적조성,직지5%신조비적신호도능취득교호적결과,병차불산생연지.인차,소제조성적산법시역동태방법실현적일개관건기출,평활양조함수시-개교호적선택.
Inverse Kinetics Method is an effective online reactivity measurements method.The key issue of the Inverse Kinetics Method is how to calculate the derivative and integral of the neutron signal accurately.The derivative of the neutron signal is very sensitive to random noise which can not be avoided in measurement.Several methods which can restrain noise are presented and numerically simulated,including digital filter and cubic smoothing splines.As shown from the numerical simulation,cubic smoothing splines can restrain the noise in the neutron signal,even for the signal noise ratio of 5%,without the delay effect normally existed in digital filter.Therefore,treatment of the noise in the neutron signal is the key issue for the inverse kinetics method,and cubic smoothing splines is a good choice.