Digital Computer Program for Determining Effect of High-Level RF Exposure on Missile Systems

摘要

The development of a general digital computer program, is described, to predict the current flowing in an Electrical Initiator (EI), connected to a 'Receptor' circuit of a typical missile syste, as a result of the effects of high level radio system frequency ambient radiation. The program is based on an analysis of current flow resulting from induced electromotive forces of any value, acting in the series arms of any or all sections of a ladder type network. Included are the effects of mutual coupling from neighboring 'Interfering' circuits, effects of stray capacitance to shields, unbalance, and leakage of electromagnetic energy through apertures in the missile metallic shielding. The electrical length of the network sections are taken sufficiently short to allow lumped values of series and shunt impedances to be used, such that the networks are equivalent, for all practicable purposes, to transmission lines with distributed impedances. The general program is written in FORTRAN IV language for IBM 7090 or 7094 computers. The standard 32K storage is sufficient for about 40 Interfering lines coupling into the Receptor line, each having up to 150 network sections. More sections can be handled if the number of Interfering lines is reduced. The computer automatically prints and plots the total current flowing in the EI, as a result of numerical values of radiation field intensity and parameters applicable to a given missile configuration. Values for a typical missile system are chosen and a sample problem solved. (Author)