NLMS Feedback Vibration Control of Open Cylindrical Shells With Active Constrained Layer Damping

HUANG Zhidan; XIANG Nan; SU Cheng

doi:10.21656/1000-0887.410312

Volume 42 Issue 7

Jul. 2021

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HUANG Zhidan, XIANG Nan, SU Cheng. NLMS Feedback Vibration Control of Open Cylindrical Shells With Active Constrained Layer Damping[J]. Applied Mathematics and Mechanics, 2021, 42(7): 686-695. doi: 10.21656/1000-0887.410312

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NLMS Feedback Vibration Control of Open Cylindrical Shells With Active Constrained Layer Damping

doi: 10.21656/1000-0887.410312

School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P.R.China

Funds:

The National Natural Science Foundation of China(11672121)

Received Date: 2020-10-15
Rev Recd Date: 2020-11-24

Abstract

Abstract

A novel partial active constrained layer damping (ACLD) structure was proposed to reduce the vibration of thinwalled open cylindrical shells. Based on the Sanders thinshell theory and the Lagrange equation, the dynamic model for open cylindrical shells with the partial ACLD structure was established. According to the system state space form, an adaptive feedback controller was developed based on the normalized least mean square (NLMS) adaptive filter algorithm and the linear quadratic programming algorithm (LQR) to study the effects of control parameters on the open cylindrical shell midpoint dynamic characteristics and the control voltage. The numerical results demonstrate that, the NLMS feedback control method can ensure the effectiveness of the vibration attenuation of the open cylindrical shell under different control voltage frequencies, different filter orders and different adaptive step sizes. Increasing the adaptive step size and the filtering order can effectively improve the damping decrement but raise the control voltage overshoot, while increasing the filtering order and the frequency control voltage can reduce noise and disturbance to obtain better damping effects.
- open cylindrical shell,
- vibration control,
- NLMS algorithm,
- active constrained layer damping

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References(17)

References

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