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电流变技术是机械电控制领域的一门新兴学科,尤其是它在机电转换过程中表现出的智能化控制特征,更具有巨大的潜在应用前景,本文简略回顾了电流变技术及其发展,以几个实际的例子介绍了目前设计的各类电流变元器件,展望了电流变技术在机械工程领域的应用前景。 相似文献
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电流变技术在机械工程中的应用展望 总被引:3,自引:0,他引:3
电流变技术是机电控制领域的一门新兴学科 ,尤其是它在机电转换过程中表现出的智能化控制特征 ,更具有巨大的潜在应用前景。本文简略回顾了电流变技术及其发展 ,以几个实际的例子介绍了目前设计的各类电流变元器件 ,展望了电流变技术在机械工程领域的应用前景。 相似文献
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电流变技术是电流变现象或电流变效应在工程实践中成功应用的一门技术,为了提高数控车床的加工精度,在分析了数控车床振动特性的基础上,设计了一种基于电流变液的数控车床刀具减振器,应用于抑制切削振动和振动控制。由于电流变液快速、可逆固液化以及易于控制的特性,为了能将数控车床上的振动量减少一个数量级,可以通过选择合理电流变液阻尼器的相关参数和正确设计振幅实时控制系统的方法,从而满足对数控车床减振的要求。 相似文献
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STUDY ON ELECTRORHEOLOGICAL FLUID DAMPER FOR APPLICATION IN MACHINING CHATTER CONTROL 总被引:3,自引:0,他引:3
The electrorheological fluid(ERF)is a kind of intelligent material with bright prospects for industry applications, which has viscoelastic characteristic: under the applied electric field. The dynamic model of a milling system with an ERF damper is established, and the chatter suppression mechanism of the ER effect is discussed theoretically. Both the theoretical study and the experimental investigation show that the additional damping and additioaal stiffness produced by the ERF increase with the rise in the strength of electric field E, but their influence on the cutting stability is different. Only when both additional damping and additional stiffress cooperate, the milling chatter can be suppressed quickly and effectively. In additional, an ERF dumper used on the arbor of horizontal spindle milling machine is developed, and a series of milling shatter control experiments are performed. The experimental results show that the milling chatter can be suppressed effectively by using the ER damper. 相似文献
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亚微米超精密车床振动控制系统是一个带不确定干扰的非线性系统,用广义预测控制原理提出了一种数字控制的新方法。该方法克服了一般线性状态反馈控制所存在的由于模型非线性和干扰引起系统动态特性和控制精度变差的缺点。用该方法所设计的电磁作动器能够有效地抑制空气弹簧固有的非线性和电磁线圈反电势所引起的涡流干扰。通过仿真,将该方法与一般线性状态反馈控制相比较,结果证明了该方法使系统具有更强的鲁棒性、更好的动态品质和更高的控制精度。 相似文献
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Sung-Ryong Hong Seung-Bok Choi Moon-Shik Han 《International Journal of Mechanical Sciences》2002,44(10):2027-2045
A squeeze-mode electro-rheological (ER) mount has been designed, manufactured, and applied to the vibration control of a frame structure subjected to external excitations. After verifying that the damping force of the ER mount can be controlled by controlling the applied voltage, a frame structure system supported by spring mounts and the proposed ER mounts has been assembled. The governing equation of the structural system is derived in the modal coordinate and is rewritten as a state-space control model. An optimal controller, which consists of the velocity feedback signal of the frame structure and the force feedback signal transmitted from the exciting point to the mount position, is formulated in order to attenuate the imposed excitations. The controller has been optimized experimentally and control responses such as the acceleration of the frame structure and the transmitted force at each mount position are presented in both time and frequency domains. 相似文献
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针对组成弹性机构的特点,给出了一种描述组成弹性机构的2节点8自由度约束阻尼平面刚架单元的形函数,建立了含大阻尼材料时弹性机构的动力学方程,基于此研究了弹性连杆机构模态损耗因子的预测问题。文中方法概念清晰、计算简单、预测可靠。可用于解决阻尼处理中的机构结构参数的优化设计问题。 相似文献
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模糊控制技术及其在汽车半主动悬架中应用 总被引:17,自引:0,他引:17
建立了4自由度汽车半主动悬架系统的数学模型,采用模糊控制策略,对半主动悬架系统进行了计算机仿真。在此基础上,设计开发了以8098单片机为主控器件的半主动悬架模糊控制系统,并对自行研制的半主动悬架系统进行了实车道路试验。仿真计算和实车试验结果较吻合,其结果均验证了半主动悬架系统在减少振动,提高汽车行驶平顺性方面要优于传统被动悬架系统。 相似文献