微型双执行器的MPC-ESO位置控制策略,考虑到软管效应
Tengfei Ma1, Bin Wang1,2, Zhenhao Wang1
1College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Micromachines
|June 28, 2023
概括
本研究涉及微型液压系统中软管体积扩张. 一种新的模型预测控制与扩展状态观察器 (MPC-ESO) 提高了动态性能并减少了错误,特别是在高频运动中.
科学领域:
- 机器人和控制工程 机器人和控制工程
- 流体力学和液压学 流体力学和液压学
背景情况:
- 微型液压执行器面临性能问题,原因是压力下软管体积膨胀.
- 软管的体积变化受到复杂,不确定的因素的影响.
- 精确模拟软管变形对于精确的控制至关重要.
研究的目的:
- 为了研究小型液压系统中软管变形特征.
- 制定先进的控制策略,以减轻非线性和不确定性.
- 为了提高微型液压执行器的动态性能和精度.
主要方法:
- 试验测试软管变形的试验.
- 开发一个通用回归神经网络 (GRNN) 模型用于软管行为.
- 建立一个小型的双液压驱动系统模型.
- 关于使用增强最小状态空间 (AMSS) 模型和扩展状态观察器 (ESO) 的模型预测控制 (MPC) 策略的建议.
主要成果:
- 与传统的MPC和模糊PID控制器相比,MPC-ESO控制策略显示出优越的动态性能.
- 位置响应时间缩短了0.5秒.
- 稳定状态误差减少了4.2%,特别明显在高频运动中.
- 通过MPC-ESO战略,有效地抑制了负载干扰.
结论:
- 拟议的MPC-ESO控制策略显著提高了微型液压驱动系统的性能.
- 这种方法提供了更好的准确性,更快的响应时间和更好的干扰排斥.
- 经过验证的模型和控制策略为具有挑战性的微型液压应用提供了强大的解决方案.
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