GROUP DELAY INDUCED INSTABILITIES AND BIFURCATIONS OFCONTROLLED MECHANICAL SYSTEMS

• 作 者: H.Y.Hu[1]B.Liu[2]
• 机 构: Department of Mechanics,School of Aerospace Engineering,Beijing Institute of Technology,Beijing,1000
• 出 处: The Third International Conference on Dynamics,Vibration and
• 发表日期: 2010年期

　　Digital filters, frequently used in active control of mechanical systems, enable one to improve the signal-to-noise ratio and the control performance, but introduce group delays into the control loops simultaneously.Recent experimental studies, such as the flutter control of an airfoil section subject to wind flow [1], showed that the group delay of a digital filter might induce instability and corresponding bifurcation of the controlled system.