双频激电仪的建模与仿真分析  

MODELING AND SIMULATION ANALYSIS OF DUAL-FREQUENCY IP INSTRUMENT

作　　者：陈儒军[1] 何继善[1] 白宜诚[1] 汤井田[1] 

机构地区：[1]中南大学信息物理工程学院,长沙410083

出　　处：《物探化探计算技术》2003年第4期289-297,共9页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家"十五"科技攻关计划(2001BA609A-5)

摘　　要：仿真技术可在物探仪器的设计、评价和优化中发挥重要作用,可降低仪器开发的风险、周期和成本。以MATLAB的SIMULINK作为仿真工具,对在我国取得广泛应用的双频激电仪建立了仿真模型。分析了双频激电仪的动态响应过程,给出了仪器各部分从启动到进入稳定状态的输出波形。在已知参数的激电模型上,频散率在其仿真结果与模型理论值之间的绝对误差为0.11%,这说明双频激电仪的仿真模型是可行的。仿真结果表明:在开始的几个低频周期中,仪器的观测值比真实值要小,其差距随着时间的延长也在快速变小。在七个低频周期后,仪器已无法分辩测量值与真实值之间的差异。Simulation technology play an important role in design, evaluation, and optimization of geophysical exploration instrument to reduce the risk, period and cost of instrument development. Based on the simulation tool of MATLAB/SIMULINK, the model of dual-frequency IP instrument, which has broad field application in China, is built. Based upon the model, we analyze the dynamic response procedure of the dual-frequency instrument and produce waveforms that reflect its response change from transient state to steady state of each subsystem inside the instrument. By applying the IP model with given parameters, the absolute percentage error of frequency effect between actual values and simulation results of IP mode is 0.11%, which shows the feasibility of dual-frequency IP instrument. After the start of the instrument, the observed value is lower than actual value in the first several low-frequency period and the difference, however, reduce rapidly with the elapse of time. After the first 7 low-frequency periods, the instrument can not distinguish the difference between observed value and actual value.

关 键 词：双频激电仪 建模 仿真 物探仪器 MATLAB SIMULINK 

分 类 号：TP337[自动化与计算机技术—计算机系统结构]