Research on nonlinear dynamics of giant magnetostrictive actuators under delayed feedback control
YAN Yan
GAO Daxiao
Abstract：[Objective]In response to the bifurcation and chaos phenomena in the dynamics of giant magnetostrictive actuator(GMA),which reduce the output stability of the system,a velocity delay feedback controller was designed to suppress the main resonance bifurcation and chaotic motion of the GMA system.[Methods]The analytical expression and amplitude frequency response equation of the system were solved based on the multi-scale method.The influence of the key structural parameters of the system and the delayed feedback parameters on the main resonance and chaotic motion of the system was studied through the numerical simulation.[Results]The research results indicate that appropriately increasing the feedback gain coefficient and reducing the delay parameter can effectively eliminate the main resonance bifurcation phenomenon of the system.Increasing the feedback gain coefficient can adjust the system response from chaotic motion to periodic motion,thereby improving the stability of the system.
Keywords：Giant magnetostrictive actuatorMain resonanceBifurcationChaotic motionStability
Publication Date：2025-07-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 45-52 )