Feedback linearization of an active magnetic bearing with voltage control
Feedback linearization of an active magnetic bearing with voltage control
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DOI：
10.1109/87.974335
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发表时间：
2002-08
期刊：
影响因子：
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通讯作者：
Jeffrey D. Lindlau;C. Knospe
中科院分区：
文献类型：
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作者：
Jeffrey D. Lindlau;C. Knospe
针对单自由度磁轴承试验台提出了一种反馈线性化控制器。反馈线性化控制器来自一个详细的非线性电磁铁模型，使用解析关系和实验校准数据。该控制器在电压模式下的试验台上实现，并使用测量的开环传递函数来证明反馈线性化控制器在将非线性系统转化为线性系统中的有效性。接下来，一个高性能的控制器的反馈线性化的植物设计与/spl μ/-合成，以保证光束的兼容性性能规格。一个共同的问题与磁悬浮系统中的电压控制和线圈电阻的变化，成功地处理通过增加反馈线性化的植物与结构的不确定性。实验结果表明，与反馈线性化的/spl μ/控制器实现指定的性能在设计过程中的非线性对象的干扰力水平或位移的独立。
A feedback linearization controller is presented for a single-degree-of-freedom (DOF) magnetic bearing test rig. The feedback linearization controller is derived from a detailed nonlinear electromagnet model using both analytic relationships and experimental calibration data. The controller is implemented on the test rig in voltage mode, and measured open-loop transfer functions are used to demonstrate the effectiveness of the feedback linearization controller in transforming the nonlinear system to a linear plant. Next, a high-performance controller for the feedback linearized plant is designed with /spl mu/-synthesis to guarantee a beam compliance performance specification. A common problem associated with voltage control in magnetic suspensions and coil resistance variation, is successfully handled by augmenting the feedback linearized plant with a structured uncertainty. Experimental results demonstrate that the /spl mu/ controller with feedback linearization achieves the performance specified during design for the nonlinear plant independent of the disturbance force level or displacement incurred.