Asymmetric Input-Output Constraint Control of a Flexible Variable-Length Rotary Crane Arm

2021 ◽  
pp. 1-10
Author(s):  
Yu Liu ◽  
Yanfang Mei ◽  
He Cai ◽  
Changran He ◽  
Tao Liu ◽  
...  
Keyword(s):  
Variable Length ◽  
Input Output ◽  
Constraint Control ◽  
Rotary Crane ◽  
Output Constraint

scholarly journals Research on Frequency-Selective Output Constraint Algorithm for Active Vibration Control

2020 ◽  
Vol 11 (1) ◽  
pp. 201
Author(s):  
Xibin Ma ◽  
Zhangwei Chen
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Main Idea ◽  
Least Mean Square ◽  
Output Constraints ◽  
Constraint Control ◽  
Active Vibration ◽  
Frequency Selective ◽  
Amplitude Compensation ◽  
Output Constraint

An algorithm is proposed to implement the frequency-selective output constraint control for active vibration control at target sub-frequencies. The main idea lies in that the Narrowband Filtered-X Least Mean Square (NFXLMS) algorithm is used for the frequency-selective active vibration control, after which a modified rescaling algorithm is applied to simultaneously implement the output constraints at target sub-frequencies. Besides, an amplitude compensation method is employed to accelerate the convergence rate at different frequencies. Eventually, numerical simulations are carried out, in which the results show that the proposed algorithm can be effectively used for frequency-selective output constraint control with much more accuracy and flexibility, less distortion and harmonics.

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