共查询到20条相似文献,搜索用时 156 毫秒
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基于超声波电动机振子的等效电路模型,从电动机振子导纳一频率特性实验数据出发,由导纳圆近似计算法得出超声波电动机建子等效电路参数值,然后根据非线性最小二乘原理构造优化函数,采用Levenberg—Marquardt优化算法辨识电机参数。辨识结果准确,为电机驱动控制系统仿真与高性能控制算法研究提供了良好基础。 相似文献
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阐述了行波型超声波电机驱动的特点和要求,并结合DSP设计了一套简单可行的驱动控制系统.实验表明,该系统结构简单,性能稳定可靠,是对行波型超声波电机驱动控制系统一种新的探索. 相似文献
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为了研究超声波电机运行过程中温升和频率漂移等关键技术问题,采用自然对流传热问题的牛顿冷却定律和热容理论,建立了超声波电机的温度特性与驱动频率之间的关系表达式,仿真分析了驱动频率对电机温升的影响;考虑电机压电定子的转动惯量和剪切变形等因素,利用能量等效原则和铁摩辛柯梁振动理论建立了超声波电机谐振频率与温度之间的关系表达式,通过仿真研究了温度对电机谐振频率漂移的影响,并通过实验验证了仿真结果的正确性。仿真及实验结果表明:电机的谐振频率随着温度的升高呈线性降低;驱动信号频率越接近电机谐振频率,电机表面温度就越高。最后,根据研究结果提出了减小电机温升和频率漂移的措施,并通过实验验证所提出措施的有效性。 相似文献
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介绍了一种基于DSP的超声波电机驱动控制系统.对系统的硬件和软件设计作了说明,利用PI控制策略对超声波电机进行了闭环控制,测试结果表明了方法的可行性。 相似文献
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应用DDS技术开发出了一种高性能的超声波电动机驱动及控制电源,并基于LabVIEW的平台,建立了超声波电动机的控制系统,最后将控制系统用于自行研制的行波超声波电动机的转速控制。实验表明,该控制系统可以方便地控制电机转速,且信号的频率及相位差控制精度高,有利于研究超声波电动机的控制特性及其性能。 相似文献
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Erdal Bekiroglu 《Journal of Electroceramics》2008,20(3-4):277-286
In the last decades piezoelectrically driven ultrasonic motors have become alternative actuators to the conventional electromagnetic
motors especially for precise and accurate servo positioning applications. Different types of ultrasonic motors have been
constructed and manufactured. Several drive systems have been designed, implemented and proposed for these motors. A variety
of control techniques have been applied to them. The research given in this study covers bases of the ultrasonic motors. Theoretical
background, modeling, drive systems, control techniques and applications of the ultrasonic motors have been introduced. Firstly,
the general overview has been given. Then, modeling studies focused on performance estimation and analysis of ultrasonic motors
have been examined. Afterwards, drive systems and control techniques of ultrasonic motors have been investigated. Furthermore,
an example drive and control system has been presented. This drive system has been designed as to be controlled digitally.
In addition, the important industrial and research applications of these motors have been included. The presented study has
been arranged as a review of ultrasonic motors. The important points of specifications, models, drive systems and control
methods of the ultrasonic motors have been emphasized. 相似文献
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复合式超声波电机的原理及前期设计 总被引:1,自引:0,他引:1
从复合式超声波电动机的结构入手,对其进行了分类,定性分析了不同结构超声波电动机的工作原理及其特性,并对纵-扭复合式超声波电动机设计中的关键问题进行剖析,为电机的结构设计提供理论依据。 相似文献
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行波超声波电机瞬态特性的测试及分析 总被引:2,自引:0,他引:2
瞬态响应特性是超声波电机的一项重要性能指标。通过主要由光电编码器和数字示波器组成的测试系统,对直径60mm行波超声波电机的瞬态响应特性进行测试,测得超声波电机启动和断电自锁时定子振动和转速变化的过程。利用测试数据和建立定、转子接触面上力的传递、转子内力的传递、定、转子振动耦合特性等力学模型,对行波超声波电机的瞬态特性进行理论分析。这些分析为超声波电机的深入研究提供了理论依据。 相似文献
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通过SCI-E电子数据库,在作者、国家/地区、机构、出版年、文献来源、主题种类等方面,全面、客观地分析超声电机在国内外的研究发展状况及趋势,用具体数字为中国超声电动机研究提供参考和帮助. 相似文献
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This work discusses kinematical and dynamic matching between stator and rotor in standing-wave-type ultrasonic motors. A remarkable
feature of standing-wave-type ultrasonic motors is that the stator intermittently contacts the rotor. The dynamic responses
of the rotor in rotary direction and in pre-pressure direction influence the performances of the motor. The responses in the
two directions have been investigated independently, because the two degrees of freedom are orthogonal in physics. To enhance
drive force, rotation velocity and to reduce noise, the contact not only must be short enough but also must occur in the largest
velocity area of the stator in the rotary direction of the rotor. The discussions presented in this paper can be used for
guiding in the design of standing-wave-type ultrasonic motors. 相似文献
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Micro Piezoelectric Ultrasonic Motors 总被引:1,自引:0,他引:1
K. Uchino S. Cagatay B. Koc S. Dong P. Bouchilloux M. Strauss 《Journal of Electroceramics》2004,13(1-3):393-401
This paper reviews recent developments of micro ultrasonic rotary motors using piezoelectric resonant vibrations. Following the historical background, four ultrasonic motors recently developed at Penn State University are introduced; windmill, PZT tube, metal tube, and shear-type motors. Driving principles and motor characteristics are described in comparison with the conventional ultrasonic motors. Motors with 1.5 mm in diameter and 0.8 mNm in torque have been actually developed. 相似文献
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超声电机伺服控制技术研究进展 总被引:3,自引:0,他引:3
超声电机伺服控制技术还不够成熟.对目前超声电机伺服控制使用的各种控制器进行了对比分析.得出用DSP作为控制器构建伺服控制系统,或用FPGA/CPLD开发专用的超声电机控制系统.将是超声电机控制系统的首选.分析了超声电机3种控制变量的控制特点及其与控制目标的关系,并对超声电机现有的各种控制用数学模型和控制策略进行了分析.指出结合调频调相调幅等多种控制方式,综合多种先进控制策略的优点,实现超声电机的速度、位置、能量转换效率和电机寿命等多目标优化控制,将是超声电机伺服控制的发展方向. 相似文献