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 共查询到10条相似文献,搜索用时 62 毫秒
1.
张德林  杨凯  贺晋华  辜承林 《微电机》2007,40(10):72-76
形状记忆合金执行器、压电陶瓷执行器和超磁致执行器是电工科学领域中最具有科学意义和应用前景的电工器件。综述了以上3种执行器的应用领域及研究热点,指出了在今后研究中需要解决的关键技术问题。  相似文献   

2.
PROFIBUS现场总线技术在宁海电厂的应用   总被引:1,自引:0,他引:1  
陈杭君 《中国电力》2005,38(7):57-60
PROFIBUS现场总线技术在工业过程控制中已有广泛应用,但在国内大型电厂工程中的应甩还处于尝试阶段.介绍PROFIBUS现场总线的技术特点和在电厂中的应用情况,根据其特点,在浙江国华宁海电厂一期工程4台国产亚临界600MW机组的设计中,对设备分布广泛的闭冷水系统,采用了基于PROFIBUS总线通信控制的AUMA智能执行机构,并以PROFIBUS总线通信实现了分散控制系统(DCS)与汽轮机数字电液控制系统(DEH)的一体化.总结采用现场总线的经验表明:在工程造价、系统安全性等方面具有积极的意义.并给全面数字化生产和维修管理奠定了基础,为后继工程建设积累了设计和工程经验。  相似文献   

3.
压电驱动器研究与应用中的若干新进展   总被引:1,自引:0,他引:1  
杨凯  张德林  辜承林 《微电机》2007,40(6):83-87
作为新型功能材料驱动器家族中的重要成员,压电陶瓷在工业生产和日常生活中得到了广泛的应用。由压电陶瓷构成的精度高、控制方便、能耗低的驱动器,在精密伺服控制系统中具有独特的技术优势。详细阐明了压电驱动器的独特优点,概述了其结构类型与应用分类。在此基础上,综述了该驱动器研究与应用中的若干热点以及未来的发展趋势。  相似文献   

4.
文章通过对Profibus DP总线技术及其应用的综合论述,分析了现场总线电动执行机构的应用优势和需要注意的问题。针对基于Profibus DP总线协议的AUMA一体化电动执行机构,具体阐述了其在浙江国华宁海电站一期工程的硬件构架、上位机组态和操作的实现,从而真正体现基于现场总线技术的电动执行机构的安全性、经济性。  相似文献   

5.
Profibus现场总线以其卓越的技术性能,在全世界范围内得到广泛的应用。在电动执行机构行业内也需要开发带有Profibus现场总线接口的产品。着重介绍了带有Profibus现场总线接口的智能型电动执行机构的开发、试验和应用,实践证明,使用效果较好,对其推广具有重要意义。  相似文献   

6.
微电子机械系统(MEMS)技术结合磁性材料的特性,会产生许多新的功能,并在很多领域得到应用,如信息技术、汽车工业、生物医学,航空以及科学仪器等.本文阐述了在微米尺寸下,磁性MEMS相对于静电和压电执行器,在强度、偏振、执行距离等方面具有的优势,并就磁性MEMS现有及潜在的应用加以概述.  相似文献   

7.
Fundamental and applied studies, recently and currently being done in Japan, in regard of the department of ventricular assist devices are briefly summarized from the engineering standpoint. Present status of the development of blood pumps and their materials, design of control drive systems for pneumatic drive and permanently implantable, electromechanical actuators, and fundamental studies of the effects of ventricular assist on the hemodynamics and cardiac mechanics are described. Clinical cases of the application of ventricular assist devices are also documented.  相似文献   

8.
Xinetics is working with NASA to develop a cryogenic deformable mirror technology to meet the specific needs of the Next Generation Space Telescope. One of the critical technical issues is the development of a cryogenic actuator with sufficient displacement and temperature stability. This paper discusses the two year effort to achieve a cofired electroceramic multilayered cryogenic actuator. The development began by testing materials from 300 to 35 K via a cut and bond actuator technology that led to a cryogenic electroceramic material down selection. After selecting a doped SrTiO3, a cofired actuator process specific to the cryogenic ceramic was developed. The assembled cryogenic actuators achieved the 3 m displacement (stroke) between 35 and 65 K required by the deformable mirror design. The discrete cryogenic actuators were assembled into an engineering model cryogenic 349-channel deformable mirror that was delivered to NASA in October 2001.  相似文献   

9.
This paper presents design of an self contained actuators unit in wide area damping control of power system in stabilizing system response for both nominal system condition and during actuator faults. First it is presented that use of multiple actuators in wide area control aid in improving damping in power system. A wide area damping controller feeding multiple actuators to satisfy multiple objectives in wide area damping control of power system is designed. Minimization of infinity norm of closed loop transfer function of power system with wide area controller in feedback path & closed loop poles placement techniques are used in controller synthesis. Second a reconfigurable control on the lines of fault hiding principle is added to the controller design to maintain system damping to pre-fault level in case of actuator faults. A reconfiguration component(RC) is activated on occurrence of actuator fault thereby reconfiguring system dynamics and redistributing wide area control signal among remaining active actuators. RC together with remaining active actuators and under same wide area damping controller maintains system damping to pre-fault level thereby preserving system dynamic response. In the reconfigurable control design presented here no new actuators outside the unit of actuators designed for wide area damping control is required. This makes for an self contained actuators unit in wide area damping control of power system both for nominal system condition and for system affected by actuator faults. A two area power system model is considered here for demonstrating effectiveness of designed robust damping controller with multiple outputs feeding multiple actuators in wide area control and illustrating the idea of self contained actuators unit for maintaining system damping in case of actuator faults.  相似文献   

10.
贺增耀  高文彦 《热力发电》2007,36(1):5-7,11
为了适应自动控制技术水平的不断发展,电动执行器在精确性、灵敏度、快速反应和稳定性等方面也有了较大提高,但是目前应用的国产电动执行器在定位器和位置发送器的灵敏度、准确性以及智能化等方面与进口电动执行器还存在差距。通过国华宁海电厂在现场总线控制系统中采用进口电动执行器的应用实例,介绍了当代先进的电动执行器的技术特点。  相似文献   

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