单晶硅拉晶机软轴升降系统混沌的脉冲控制
Impulse control of chaos in the flexible shaft rotating-lifting system of the mono-silicon crystal puller
摘要：
本文研究了单晶硅拉晶机柔性轴升降系统中的混沌现象。然而，混乱是有害的单晶硅晶体生产的质量。因此，它应该被抑制。许多混沌控制方法已经在理论上被提出，有些甚至已经应用到实际中。对于一个具有有害混沌的实际对象，来自特定区域的工程师通常面临着识别混沌并使用适当方法抑制混沌的挑战。然而，尽管现有的方法，在FSRL系统的混沌控制方法的选择是不是一个微不足道的任务。例如，对于OGY方法，如果找不到实际可调参数，则不能应用OGY方法。提出了一种脉冲控制方法，该方法能够有效地抑制FSRL系统中的混沌。采用Melnikov方法得到了控制参数的选取。仿真结果验证了理论分析的正确性和混沌控制方法的有效性。
英文摘要：
Chaos is shown to occur in the flexible shaft rotating-lifting (FSRL) system of the mono-silicon crystal puller. Chaos is, however, harmful for the quality of mono-silicon crystal production. Therefore, it should be suppressed. Many chaos control methods have been proposed theoretically and some have even been used in applications. For a practical plant displaying harmful chaos, engineers from a specified area usually face with the challenge to identifying chaos and to suppressing it by using a proper method. However, despite of the existing methods, chaos control method selection in the FSRL system is not a trivial task. For example, for the OGY method, if one cannot find a practical adjustable parameter, then the OGY method cannot be applied. An impulsive control method is being proposed which is efficiently able to suppress chaos in the FSRL system. The selection of the control parameters is obtained by using the Melnikov method. Simulation results show the correctness of our theoretical analysis and the effectiveness of the proposed chaos control method.
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