Modeling method for secondary path of helicopter vibration active control system

Abstract

The invention belongs to the technical field of helicopter vibration active control, and discloses a modeling method for a secondary path of a helicopter vibration active control system. The method comprises the following steps: S1, numbering a plurality of actuators and a plurality of vibration sensors; S2, starting the ith actuator; S3, sending an output force instruction to the ith actuator; S4, after the output force of the ith actuator is stabilized, selecting vibration data of all vibration sensors in a preset time period; S5, closing the ith actuator to stop working; S6, repeatedly executing the steps S2-S5 until the vibration data of all the vibration sensors corresponding to the Nth actuator is obtained, thereby obtaining all the collected vibration data; and S7, determining a secondary path model according to all the acquired vibration data. The method is high in feasibility, short in time consumption and relatively high in effectiveness and reliability. And after the secondary path modeling is completed, if the force transmission path and the dynamic characteristics of the helicopter are not changed, modeling does not need to be carried out again.

Description

technical field [0001] The invention belongs to the technical field of helicopter active vibration control, and in particular relates to a secondary path modeling method for a helicopter active vibration control system. Background technique [0002] The main function of the helicopter vibration active control system is to reduce the vibration level of the helicopter through active control. The basic principle is to generate vibration through the output control force of the actuator to offset the vibration at the vibration sensor. In order to achieve the vibration reduction function, the system needs to obtain the secondary channel model before the vibration reduction, that is, the transfer function from the installation position of the actuator to the installation position of the vibration sensor. This model is the key to whether the system can achieve the vibration reduction function. [0003] The secondary path modeling method of helicopter active vibration control system ...

AI Technical Summary

Problems solved by technology

[0004] At present, most active vibration control systems for helicopters are in the theoretical research stage in China, and there are no other systems under research

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