空气舵系统摩擦模型及参数识别方法研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (22) : 98-103.

论文

空气舵系统摩擦模型及参数识别方法研究

李雨青，南宫自军，刘博

作者信息 +

Friction model and parameter identification method for an air rudder system

LI Yuqing，NANGONG Zijun，LIU Bo

Author information +

文章历史 +

摘要

空气舵作为常用的飞行器执行机构，存在间隙与摩擦等非线性特性，其非线性建模是一个反复迭代的过程，需要选择合适的模型反映其真实的动力学特性。为此，本文采用库仑摩擦模型和Stribeck摩擦模型建立了含间隙和摩擦的舵系统非线性动力学模型，并分别采用最小二乘非线性拟合法和遗传算法使用试验数据对模型中的未知参数进行识别。研究表明，相较于Stribeck摩擦模型，库仑摩擦模型能较为准确地反映系统中的摩擦力矩，两种参数识别方法均能有效完成未知参数的识别。

Abstract

As a kind of commonly used aerospace vehicle effector, air rudder has nonlinear characteristics such as clearance and friction. Its nonlinear modeling is an iterative process and it is necessary to select a suitable model to reflect its true dynamic characteristics. To this end, this paper uses the Coulomb friction model and the Stribeck friction model to establish the nonlinear dynamics model of the rudder system with clearance and friction,and uses the least square nonlinearfitting method and the genetic algorithm to identify the unknown parameters in the model using experimental data. The results show that,compared with the Stribeck friction model,the Coulomb friction model can more accurately reflect the friction torque in the actual system,and both parameter identification methods can effectively complete the identification of unknown parameters.

导出引用

李雨青，南宫自军，刘博. 空气舵系统摩擦模型及参数识别方法研究[J]. 振动与冲击, 2021, 40(22): 98-103

LI Yuqing，NANGONG Zijun，LIU Bo. Friction model and parameter identification method for an air rudder system[J]. Journal of Vibration and Shock, 2021, 40(22): 98-103

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