双曲扁壳大挠度低频振动主动控制理论与试验技术研究

项目名称： 双曲扁壳大挠度低频振动主动控制理论与试验技术研究

项目编号： No.11302160

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 张亚红

作者单位： 西安交通大学

项目金额： 30万元

中文摘要： 双曲扁壳广泛用于大型轻质柔性航天结构，外部的环境条件极易引起扁壳发生大挠度的低频振动，严重威胁结构的安全性和可靠性。目前针对双曲扁壳大挠度低频振动控制的研究尚属空白，因此本项目拟开展以下工作：（1）建立基于MFC作动器的双曲扁壳的线性、非线性机电耦合解析模型以及作动器的作动解析模型，结合作动解析模型和壳体有限元模型，发展并建立局部附加MFC作动器的双曲扁壳机电耦合混合模型，研究基于MFC作动器的双曲扁壳系统动力学特性。（2）基于作动解析模型，研究作动器结构参数、位置、驱动电压等对作动力/力矩的影响规律，完成作动器的布局优化研究，并进行试验验证。（3）提出适合双曲扁壳大挠度低频振动的控制算法，仿真分析不同控制算法下双曲扁壳的振动控制效果。（4）搭建系统振动控制试验平台，开发双曲扁壳大挠度低频振动控制试验技术，验证理论模型和优化方案，实现双曲扁壳的大挠度低频振动主动控制。

中文关键词： MFC作动器；双曲扁壳；非线性振动；振动主动控制试验；模糊控制

英文摘要： Double-curved shallow shells are widely used in the lightweight aerospace structures with large dimensions.The load conditions of the structures always result in large deflection vibrations of the shells at low frequencies, which threatens the stability and security of the whole system.At present, no research has been reported on the large deflection vibrations of the double-curved shallow shells with low frequencies.In light of this, active vibration control of the double-curved shallow shells using macro-fiber composite(MFC) actuators is proposed, which involves: (1) By the analytical method,both of the linear and nonlinear electromechanically coupled models of the double-curved shallow shell patially covered by MFC actuators will be established and the dynamic characteristic of the nonlinear system will be explored, comparatively with the linear system.The actuation equations for the MFC actuator will be derived.By merging the actuation equations and the finite model of the base shell, a new electromechanically coupled model for the nonlinear system will be established. （2）According to the actuation equations, actuation characteristics of the MFC actuators will be investigated and optimization for the structure parameters, positions, driving voltages, and distribution of the actuators will be carried out. Mo

英文关键词： Macro-fiber composite actuator；double-curved shallow shells；nonlinear vibration；vibration control experiments；fuzzy logic control