现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
14期
1-4
,共4页
缑新科%李冬冬%陈卓%王能才
緱新科%李鼕鼕%陳卓%王能纔
구신과%리동동%진탁%왕능재
压电悬臂梁%振动主动控制%子空间辨识%LQG控制器
壓電懸臂樑%振動主動控製%子空間辨識%LQG控製器
압전현비량%진동주동공제%자공간변식%LQG공제기
piezoelectric cantilever beam%active vibration control%subspace identification%LQG controller
针对柔性结构的振动普遍存在复杂性、非线性和建模难的特点，跳过了复杂的机械-电压建模，基于子空间系统辨识方法的基本算法和特点，设计出抑制悬臂梁振动的一种最优控制器，并在算法实现、算法性能方面进行了仿真和实时控制实验。实验结果表明，算法在提高系统辨识精度，降低计算量等方面都有显著提高，控制效果比较理想。
針對柔性結構的振動普遍存在複雜性、非線性和建模難的特點，跳過瞭複雜的機械-電壓建模，基于子空間繫統辨識方法的基本算法和特點，設計齣抑製懸臂樑振動的一種最優控製器，併在算法實現、算法性能方麵進行瞭倣真和實時控製實驗。實驗結果錶明，算法在提高繫統辨識精度，降低計算量等方麵都有顯著提高，控製效果比較理想。
침대유성결구적진동보편존재복잡성、비선성화건모난적특점，도과료복잡적궤계-전압건모，기우자공간계통변식방법적기본산법화특점，설계출억제현비량진동적일충최우공제기，병재산법실현、산법성능방면진행료방진화실시공제실험。실험결과표명，산법재제고계통변식정도，강저계산량등방면도유현저제고，공제효과비교이상。
As the vibration of the flexible structure is generally non-linear,complex,and difficult to model,an optimal controller to suppress the vibration of the cantilever beam was designed based on the basic algorithm and characteristics of sub-space system identification method,instead of the complex mechanical-voltage modeling. The simulation and real-time control ex-periments were carried out in the aspects of implementation and algorithm performance. The experimental results show that the algorithm has significant improvements in improving the accuracy of systems identification,reducing the amount of calculation, and enhancing the control effect.
