Analysis of M125 Booster Mechanism
Abstract
A mathematical analysis of the M125 booster safety and arming mechanism is presented. It provides a better insight into the mode of operation of the M125 and the effect of certain design parameter variations on the mechanism's performance. This analysis was made in support of product improvement efforts on the S and A device for the M514A1E1 artillery proximity fuze. Equations of motion involving 33 design and operating parameters of the mechanism and both phases of the rotor's movement are developed and discussed. In developing an expression for the damping torque due to escapement action, it is assumed that the rotor's angular velocity is proportional to the square root of the driving torque. Computations for the damping coefficient are based on a prior detailed dynamic analysis of the escape wheel and pallet covering their six phases of motion per cycle. The final equations of motion are nonlinear; digital simulation methods were therefore used for their solution. Illustrated and discussed are time, rate, and turns-to-arm versus spin speed; also, displacement, velocity, and acceleration are considered as a function of time at high- and low-spin rates (100 and 30 rps).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1971
- Accession Number
- AD0728108
Entities
People
- David L. Overman
Organizations
- Harry Diamond Laboratories