Control Strategy of 6 DOF Hydraulic Shaker

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (4) : 200-203.

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Control Strategy of 6 DOF Hydraulic Shaker

GUAN Guang&;feng1; XIONG Wei1; WANG Haitao1; HAN Junwei2

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Abstract

Torsion control strategy of 6 DOF (degree-of-freedom) hydraulic shaker is presented to improve the control precision of the system. Two torsion control loops are added to the original 6 DOF control loops. The force balance controller is improved based on the torsion control strategy. The number of controller parameters is reduced from eight to two, and the two parameters are independent and can be adjusted individually. Sine vibration tests are run in one 6 DOF hydraulic shaker with the new algorithm. Test results show that the torsion control strategy is favorable to improve the performance indices of acceleration evenness degree and transverse components in the low-frequency band of the system. The improved force balance controller can reduce the inner force among the eight cylinders effectively.

Key words

6 DOF hydraulic shaker / torsion control / force balance control / acceleration evenness degree / acceleration transverse components

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GUAN Guang&;feng;XIONG Wei;WANG Haitao;HAN Junwei. Control Strategy of 6 DOF Hydraulic Shaker[J]. Journal of Vibration and Shock, 2010, 29(4): 200-203