Active chattering control method for flexible cantilever beam structure

Abstract

The invention belongs to the field of active chattering control of a beam structure, and relates to an active chattering control method for a flexible cantilever beam structure. The active chattering control method comprises the following steps: establishing a fussy control rule according to a large quantity of simulation experiments and parameter adjusting rules; optimizing five parameters by using a fuzzy self-tuning fractional order PIlambdaDmu controller based on a genetic algorithm by means of the genetic algorithm; encoding the initial parameter of the fractional order PIlambdaDmu controller in a real number encoding way, and determining the value range of each parameter. A piezoelectric composite material is taken as an actuator, so that the actuator has high flexibility, machining performance and sensitivity, and can be applied to curved structures. The advantages of memory and accuracy of fractional order PIlambdaDmu control as well as the advantages of flexibility and robustness of fuzzy control are utilized fully, so that an optical control effect is achieved.

Description

technical field [0001] The invention belongs to the field of active vibration control of beam structures, and relates to an active vibration control method of a flexible cantilever beam structure. Background technique [0002] The wing is the main load-bearing component of the aircraft. In the design of the wing structure, the lightweight of the structure has always been one of the main goals of the design. In order to reduce the mass of the structure and improve the efficiency of the vehicle, large-scale, low stiffness and flexibility have become an important development trend of various wing structures. However, flexible space structures, such as wing structures, have the characteristics of light weight, small damping, and low stiffness. Once they are affected by external excitations, such as the influence of eddy currents during flight, they will inevitably vibrate greatly and last for a long time. time, the flutter characteristics and dynamic characteristics of the wing...

AI Technical Summary

Problems solved by technology

A series of research experiments and inventions have been carried out in terms of the analysis of vibration characteristics of flexible structures, the optimal configuration of actuator positions, the combination of advantages of intelligent algorithms, and parameter optimization, but in the design, characterization and control capabilities of dynamic system controllers On the other hand, traditional piezoelectric materials such as PZT are not easy to be used in complex curved surface structures such as wings because of their low energy density, brittleness and easy fracture, and are easily affected by environmental factors. , the emergence of piezoelectric composite fiber material (Macro Fiber Composite-MFC) provides a solution to such problems

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