Intelligent material-based active vibration isolation base system capable of controlling bearing force transmission

Abstract

The invention discloses an intelligent material-based active vibration isolation base system capable of controlling bearing force transmission, relates to the field of bearing bases, and comprises a bearing base mounting assembly, an intelligent material actuator assembly, a dynamic force sensor assembly, an active measurement and control system; the bearing base mounting assembly comprises a bearing base upper panel and a bearing base lower panel; the intelligent material actuator assembly comprises an intelligent material actuator, an actuator upper mounting plate, an actuator lower fastenerand an actuator lower mounting plate; the dynamic force sensor assembly comprises a dynamic force sensor, a dynamic force sensor upper pressing plate, a pre-tightening nut, a pre-tightening bolt, a dynamic force sensor lower pressing plate; the active measurement and control system comprises a dynamic force sensor charge amplifier, an acquisition module, A /D converter, a low pass filter, an active controller, a D/A converter, an output module, an intelligent material actuator power amplifier which are connected in sequence. The low-frequency vibration transmission force in a vibration transmission path is effectively controlled, and the installation space is saved.

Description

technical field [0001] The invention relates to the field of bearing bases, in particular to an active vibration-isolation base system based on intelligent materials that can control the transmission of bearing force. Background technique [0002] Defects and unbalances in the processing of ship propulsion shafting, misalignment in installation, and the lateral unsteady force on the propeller in the uneven wake field when the ship is sailing, and the lateral force generated by the meshing of the output end of the main engine or the reduction gearbox Factors such as unsteady excitation will cause the circular vibration of the propulsion shafting of the ship. The whirling vibration of the propulsion shafting of the ship will be transmitted to the stern hull through the radial support bearing, which will arouse the abnormal vibration of the stern hull structure, and produce significant low-frequency band multi-frequency strong line spectrum underwater radiation noise, which is ...

AI Technical Summary

Problems solved by technology

The commonly used feedback signal in the active control of ships is acceleration vibration, which is an indirect feedback method and cannot directly reflect the transmission characteristics of the dynamic force of the bearing.

At the same time, the size of the hull structure is large, the number of acceleration sensors needs to be arranged, and the comprehensive evaluation method is also relatively complicated.

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