Error Analysis in Spin Measurement using Synchro-ballistic Method and its Improvement

Prem Sahani; S. Mohapatra; H. S. Panda; S. Sarkar; M. Alam

doi:10.14429/dsj.66.9366

Prem Sahani Proof and Experimental Establishment, Balasore http://orcid.org/0000-0002-3255-1603
S. Mohapatra Proof and Experimental Establishment, Balasore
H. S. Panda Proof and Experimental Establishment, Balasore
S. Sarkar Proof and Experimental Establishment, Balasore
M. Alam Proof and Experimental Establishment, Balasore

DOI: https://doi.org/10.14429/dsj.66.9366

Keywords: Error analysis, spin measurement, synchro-ballistic, barrel rifling, optical flow, rectangle fitting

Abstract

Error analysis of spin measurement using synchro-ballistic method is presented in this paper. Error in the spin measurement varies as the projections of marker move away from axis of symmetry, and the reason for variation of error is explained. An improvement to synchro-ballistic method is proposed for spin measurement, which reduces the error in measured spin, and an algorithm for implementation of same is provided. Results of improved synchro-ballistic method are compared with the theoretical estimation of spin from muzzle velocity.

Author Biographies

Prem Sahani, Proof and Experimental Establishment, Balasore

Mr Prem Kumar Sahani received his BTech (Electronics & Telecommunication Engineering) from University College of Engineering, Burla, India, in 2008. Presently working as Scientist ‘C’ in PXE, Chandipur, India. His research interests include : Image processing, pattern recognition, and computer vision.

S. Mohapatra, Proof and Experimental Establishment, Balasore

Mrs Sudeshna Mohapatra received her BE (Mechanical Engineering) from Indira Gandhi Institute of Technology, Sarang, India in 2000. Presently working as Scientist ‘C’ in PXE, Chandipur, India. Her research interests include : Modelling and simulation in the field of ballistics.

H. S. Panda, Proof and Experimental Establishment, Balasore

Dr H.S. Panda received his MTech and PhD (Mechanical Engineering) from IIT Kharagpur. Presently working as Scientist ‘E’ in PXE, India. His research areas include : Experimental ballistics, computational fluid dynamics, spectral methods for scientific computing, microchannel flows in MEMS devices. Currently involved in high speed flow visualisation and analysis and experimental impact dynamics study.

S. Sarkar, Proof and Experimental Establishment, Balasore

Mr Sumit Sarkar received his BE (Electronics and Telecommunication Engineering) from BESU, Shibpur, India, in 2008. Presently working as Scientist‘C’ in PXE, Chandipur, India. His research interests include : Image processing, pattern recognition, and computer vision.

M. Alam, Proof and Experimental Establishment, Balasore

Md. Maqsood Alam received his BTech (Electronics and Telecommunication Engineering) from NIT Patna, India, in 2009. Presently working as Scientist ‘C’ in PXE, Chandipur, India. His research interests include : Image processing, pattern recognition and computer vision.