有源静电轴承的滑模控制

为了提高有源静电轴承系统对外部扰动与参数变化的抑制能力,分析了被控系统模型的非线性和不确定性,针对存在的不确定性设计了滑模控制器以提高系统的鲁棒性,并通过引入边界层来抑制非线性控制带来的抖动问题。对滑模控制系统的性能进行了测试,并与采用滞后-超前校正下的系统性能进行比较和分析。实验结果表明,在静电轴承系统中采用滑模控制方法,能够显著增强系统在中频和低频段的力扰动抑制能力,提高对系统参数变化的鲁棒性。

Sliding-mode control of an active electrostatic bearing system

An integral sliding-mode control scheme was developed to enhance the robustness of active electrostatic bearing systems in high-precision inertial instruments.The nonlinear and uncertain dynamics of the bearing system were modeled to design a robust sliding-mode controller for various plant uncertainties.A boundary layer scheme was used to overcome chatter.Test results indicate that the electrostatic bearing system is more robust than a classical lag-lead controller to external force disturbances and input ...