TY - EJOU AU - T1 - Multi-Order Fractional Mathieu Equation with External Multi-Periodic Excitation T2 - International Journal of Mathematical Research PY - 2016 VL - 5 IS - 2 SN - 2306-2223 AB - This paper presents an investigation of the behavior of the multi-order fractional differential equation (MFDE). We derive expressions for the transition curves separating regions of stability from instability for the MFDE generally and the particular case K=2. Employing the harmonic balance technique, we obtained approximate expressions for the n=1 and n=2   transition curves of the MFDE and particularly for the case k=2. We also obtained an approximate analytical solution to the multi-order fractionally damped and forced Duffing-Mathieu equation as well as some special cases computationally using the Homotopy Perturbation Method (HPM). KW - Homotopy perturbation method KW - Parametric excitation KW - Fractional calculus KW - Harmonic balancing method KW - Damping KW - Fractional mathieu’s equation. DO - 10.18488/journal.24/2016.5.2/24.2.166.178