一个压电纳米定位平台的高精度结构H∞控制
Huan Feng1, Hongbo Zhou2, Congmei Jiang1
1School of Electrical Engineering, Guizhou University, Guiyang, Guizhou Province, China.
PloS one
|June 16, 2023
概括
本研究介绍了用于压电纳米定位平台的结构化H∞控制,提高了跟踪精度和针对模型不确定性和共振模式的稳定性. 新的控制器在模拟和实际应用中性能优于现有的方法.
科学领域:
- 控制系统工程 控制系统工程
- 纳米技术纳米技术
- 机械电子学是什么意思 机械电子学
背景情况:
- 压电纳米定位平台由于固有的共振模式和模型不确定性而遭受性能降低.
- 在这些系统中,同时实现高精度和稳定性是一个重大挑战.
研究的目的:
- 开发一个结构化的H∞控制策略,以解决压电纳米定位系统的准确性和稳定性问题.
- 设计一个有效地减轻共振模式和减轻模型不确定性效应的控制器.
主要方法:
- 一个双循环控制结构,包含一个内部减压控制器和一个强大的反控制器.
- 使用具有多维解输出的优化矩阵设计结构化的H∞控制器.
- 模拟与整体共振控制 (IRC) 和传统的H∞控制进行比较.
主要成果:
- 拟议的结构化H∞控制器在格子输入信号 (5,10,20 Hz) 方面,与IRC和H∞控制器相比,显示出更高的跟踪精度.
- 控制器在相当大的负载 (600g,1000g) 和高频干扰下表现出强大的性能,靠近系统的共振频率.
- 结构化的H∞控制器比传统的H∞控制提供了更低的复杂性和更大的透明度.
结论:
- 结构化的H∞控制有效地满足了多个性能要求,包括对压电纳米定位平台的高精度和稳定性.
- 这种控制策略非常适合工程实践,因为其性能提高和复杂性降低.
相关概念视频
01:27Time and frequency -Domain Interpretation of PI Control
167
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
167
01:24PI Controller: Design
361
Proportional Integral (PI) controllers are a fundamental component in modern control systems, widely used to enhance performance and mitigate steady-state errors. They are particularly effective in applications such as automatic brightness adjustment on smartphones, where they excel at mitigating steady-state errors for step-function inputs. Unlike PD controllers, which require time-varying errors to function optimally, PI controllers leverage their integral component to address residual...
361