| 自适应主动隔振中输出饱和抑制方法的仿真研究 |
| |
| 引用本文： | 王俊芳,张志谊.自适应主动隔振中输出饱和抑制方法的仿真研究[J].系统仿真学报,2010,22(3). |
| |
| 作者姓名： | 王俊芳 张志谊 |
| |
| 作者单位： | 上海交通大学机械系统与振动国家重点实验室,上海,200240 |
| |
| 基金项目： | 国家自然科学基金(10672099) |
| |
| 摘 要： | 针对自适应主动隔振中存在的控制器输出饱和,提出饱和抑制方法并进行算法仿真研究。该抑制方法基于跟踪滤波和归一化LMS算法,根据引起控制器饱和的直接原因提出约束优化函数,并在快速脱离饱和以及快速收敛的约束条件下确定权系数更新公式中的可变因子。新的自适应算法在理论上能够保证控制器尽快脱离输出饱和状态,使控制误差快速下降。以一个五自由度的振动系统进行算法数值仿真,并用Sigmoid函数描述饱和输出特性,显式表示可变因子,仿真结果表明所提方法能够有效地抑制输出饱和的不良影响,显著改善自适应主动隔振的控制效果。
|
| 关 键 词： | 自适应主动隔振 输出饱和 滤波X-LMS 控制仿真 |
Simulation on Method for Output-saturation Suppression in Adaptive Vibration Isolation |
| |
| WANG Jun-fang,ZHANG Zhi-yi.Simulation on Method for Output-saturation Suppression in Adaptive Vibration Isolation[J].Journal of System Simulation,2010,22(3). |
| |
| Authors: | WANG Jun-fang ZHANG Zhi-yi |
| |
| Institution: | WANG Jun-fang,ZHANG Zhi-yi (State Key Laboratory of Mechanical System , Vibration,Shanghai Jiaotong University,Shanghai 200240,China) |
| |
| Abstract: | A new method for the suppression of output-saturation in adaptive vibration isolation was studied by simulation. Based on the tracking filtering technique and the normalized LMS algorithm, a fundamental weight updating formula was derived by solving a constrained optimization problem. The factor in the weight updating formula was given by considering two additional constraints in practice-fast convergence and saturation alleviation. Theoretically, this new adaptive control algorithm could fast reduce contro... |
| |
| Keywords: | adaptive vibration isolation output saturation filtered x-lms control simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
