De Silva, R. N. S.Hansameenu, W. P. T.2019-01-102019-01-102018De Silva, R. N. S. and Hansameenu, W. P. T. (2018). Controllability of a system of coupled harmonic oscillators. Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka. p94.http://repository.kln.ac.lk/handle/123456789/19432In general, it is worthwhile to understand and control the dynamics of an existing system whose output behaves somewhat closer to the desired output rather than developing a new system which tracks the desired output, since it is beneficial for industries in many aspects; low cost, less time, etc. In this research, we control the output of a couple harmonic oscillator which has been extensively used in many Engineering Models by mainly focusing on two types of control techniques, namely source term controlling and initial condition controlling. Numerical results using MATLAB validates that controlled system output tracks the desired output for these two types of controlling. Consider the governing equations:enCoupled Harmonic OscillatorscontrollingArticle