【作者】 赵雪山；

【导师】 王成华； 邓智泉；

【作者基本信息】 南京航空航天大学 ， 电路与系统， 2004， 硕士

【摘要】 由于磁轴承的转子和轴承之间没有机械接触，无须润滑，无油污染，使用寿命长，这些特点使它在高速旋转领域获得了广泛的应用。磁轴承发展的一个重要方向是集成化、小型化，具有径向、轴向悬浮功能的磁轴承尤其受到关注。可这类磁轴承控制系统的设计较为复杂，在设计中系统除了要考虑存在着参数不确定等内部因素外，而且还要考虑干扰变化等外在因素。因此，这类磁轴承的控制系统设计就成为鲁棒控制系统的设计。 本文的研究是针对一种高效紧凑的新型永磁偏置径向轴向磁轴承展开的，阐述了这种磁轴承的工作原理，对其数学模型及结构设计进行了研究，然后提出了这种磁轴承的设计、校核方法。为了提高磁轴承控制系统的鲁棒性，本文应用H_∞控制方法来设计该类磁轴承的控制器，并通过与传统PID控制器进行了仿真实验比较，验证了H_∞控制方法具有较好的抗干扰能力和稳定的鲁棒性。此外，建立了该类磁轴承数字控制系统，并通过仿真验证了该数字控制系统的可靠性和稳定性。更多还原

【Abstract】 The Magnetic Bearing(MB), widely used in high speed rotation field, has the advantage over conventional mechanical bearing in many aspects, such as no mechanical contact between the rotor and the bearing, no lubrication, no pollution, long-life span and so forth. The most important direction of the development of the Magnetic Bearing system is integration technology, which can simplify the control strategy, reduce the size of the system, improve rotor dynamics performances, and reduce cost. The MB with suspended ability between radial direction and axial direction has especially been emphasized. The design of MB’s control system is focused on the design of robust control system.This paper describes the study of an original radial-axial MB biased with permanent magnet, including its operation principle, mathematic model, the design of the structure, and so on. A method of design and checkout of the MB is put forward. The method of H , control has been applied to the design of the MB controller in order to improve the robust stabilization of the MB control system. In addition, the comparison between H control and traditional PID control has substantiated that H control method has better disturbance attenuation and robust stabilization. Furthermore, a digital control system for this kind of MB is established and its reliability and stabilization is verified by computer simulation of the whole digital control system.更多还原