Self-excited vibration is often suppressed as an unfavorable factor in many engineering fields.However,some special characteristics of self-exited vibration,such as,large amplitude response and strong anti-disturbances capability make it be an ideal driver for vibration utilization study,specifically,vibration energy harvesting.Herer,varying patterns of each mode and numerical criteria of self-excited vibration under control of velocity feedback were derived in studying cantilever beams with constraints of modal parameters and test points.One phenomenon,i.e.,the nonlinear limit-cycle produced by a single mode self-exited vibration was discussed as well.The correctness of this study was verified with theoretical modeling,numerical simulation,control tests and data processing.
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