MATHEMATICAL SIMULATION AND EXPERIMENTAL INVESTIGATION OF A CONTACTLESS MEASURING SECTION IN THE PROBLEM ON HIGH-VELOCITY BALLISTIC FLIGHTS

A method and system for contactless measurement of the velocity of fl ight of a thrown body over a measuring base in an air atmosphere and for the actuation of a recording apparatus by the signal formed as a result of the passage of the body through a measuring section are presented. The method proposed is based on the formation of normalized pulses of positive polarity for the synchronization of the activation of a recording apparatus by a defi nite coordinate of a body thrown. Results of calculation and experimental investigations of variable reluctance pickups in tests of high-velocity ballistic fl ights are presented. Relations allowing one to estimate the dependence of the magnetic induction in the core of a variable reluctance pickup on the value of the air gap between a magnet and the pickup are presented
   
Author:  S. I. Gerasimov, V. I. Erofeev, A. V. Zubankov, V. A. Kikeev, and V. V. Pisetskii
Keywords:  ballistic-fl ight tests, variable reluctance pickup, contactless measuring section, synchronization, magnetic fl ux, scattering coeffi cient.
Page:  165