查询词典 dynamic system

Five novel torsion-mirror optical actuators including double-beam thickness differential structure with single torsional axis, double flexible folded-beam structure with single torsional axis, double-beam vertical torsion comb structure with single torsion axis, four-beam differential compound-micromirror structure with double torsional axis and the combined structure of the four basis forms above, are brought forward. All of these devices could be fabricated by the same silicon micromachining process we have developed. The deformation compensation design with local enhancement for the thin torsional beam which is the key structure of these devices is also put forward to improve the reliability. The three-dimension solid model and two-dimension reduced order model of the torsion-mirror optical actuator are established and then the numerical simulations for evaluating the device characteristics of the statics, dynamics, electrostatic field, mechanical and electrostatic coupling, fluid and solid coupling are carried out to optimize the structure design. Furthermore, three optical fibre clamping structures which could be integrated monolithicly are designed and analyzed to improve the optical coupling capability. 4. Three flexible process flows combined with bulk silicon micromachining and surface silicon micromachining are brought forward to fabricate these novel single-crystal silicon or polysilicon torsion-mirror optical actuators by using the same lithography masks for both SOI wafer and regular silicon wafer. A series of important process experiments are carried out to optimize the process parameters and the process flows. Some novel and typical process phenomena which occurred during the microfabrication are analyzed and then the corresponding solutions are put forward. 5. A MEMS dynamic testing system which exploit blur image synthetic technique, stroboscopic image matching technique, stroboscopic mirau microscopic interferometry technique and microscopic laser dopper vibrometer technique is set up to measure three-dimension and six-freedom micro motions of any MEMS devices with nanometer resolution.

在对硅微机械扭转镜光致动器的光机电特性系统地理论研究的基础上提出了硅微机械扭转镜光致动器的结构设计准则。3、提出了单轴双梁厚度差分结构、单轴双柔性折叠梁结构、单轴双梁垂直扭转梳齿结构、双轴四梁差动复合微镜结构以及以上四种基本结构组合后的衍生结构等五种工艺加工技术兼容的新型的硅微机械扭转镜光致动器，对器件关键结构薄厚度、高耐疲劳扭转梁进行了局部加强的变形补偿设计，建立了器件的三维实体模型以及两维降阶模型，对提出的新结构硅微机械扭转镜光致动器进行了系统的静力学、动力学、静电场、力电耦合和流体固体耦合的建模仿真与优化设计，同时设计并分析了三种可实现单芯片集成的弹性光纤定位夹紧结构。4、提出了组合体硅微加工技术与表面硅微加工技术、兼容同一套光刻版图、可分别基于SOI 晶片和普通Si 晶片、适应于制造提出的各种新结构单晶硅和多晶硅硅微机械扭转镜光致动器的三套柔性加工工艺流程，开展了一系列重要工艺步骤的单项工艺试验，对工艺流程与工艺参数进行了优化，针对加工过程中出现的具有普遍意义的典型工艺问题进行了讨论和分析，并提出了解决方法。5、创新性地将模糊图像合成技术、频闪图像匹配技术、频闪Mirau 显微干涉技术与显微激光多普勒测振技术有机结合，建立起了一套周期运动测量与瞬态运动测量相结合、单点运动测量与全视场运动测量相结合、满足不同MEMS 器件各种动态测试要求的集成的MEMS 三维六自由度微运动精密测量系统。

Application of the double closed loop control has already been popular in SMPS, because such a system has a fast dynamic response and good stability.

双闭环控制在开关电源中的应用非常普遍，是因为它使系统具有较好的动态性和稳定性。

The general functions such as opening a bank account, continuing saves, drawing out, clearing the account, reporting a loss, removing the report and the dynamic alignment of the interest rate, calculating number of interest, statistics and are implemented. This system has a

系统实现了包括开户、续存、支取、清户、挂失、解挂及对利率进行动态调整、利息积数的计算和统计等功能，并具有较好的安全保密性。

A multiple-stage dynamic phase adjustment method between source synchronization driving clock and date is proposed; it fits different operation frequencies and improves the system stability.

提出了一种源同步时钟与数据相位的多级动态调节技术，从而适应不同的时钟工作频率，增加了系统的稳定性。6。

Consider to make clear, the system factor that the region industry basis that is based on this locality to change plays with national guiding is the main driving force that iron and steel industry expands Tang Shan city quickly, the ability that the business fits in dynamic environment and innovates is underlying factor.

研究表明，基于本地化的区域产业基础和国家引导下的制度因素是唐山市钢铁工业迅速发展的主要驱动力，企业在动态的环境中适应和创新的能力则是内在因素。

Based on the finite element method, the multi-mass dynamic model of a recovery parachute system is developed to study the main parachute performance using an attached apex drogue during the deployment.

采用有限元方法，建立降落伞回收系统的多质点动力学模型，研究了牵顶伞在拉直过程中对主伞性能的影响。

This paper proposes a new approach to intelligent Fuzzy-PID dual module control for improving dynamic performance of an NC servo feed system.

以数控伺服进给控制器为研究对象，采用在全论域范围内带有自调整模糊规则因子和模糊比例因子的自适应控制策略，提出一种可提高数控伺服进给系统动态性能的智能Fuzzy-PID双模控制器设计方法。

As a result, a simple control method can not improve the dynamic performance of speed servo system. Integrated the advantages of self-adaptive control, fuzzy control and PID control, an intelligent dual module NC servo controller, called self-adaptive fuzzy PID controller is designed according to the modular design principle.

在光干涉弹流油膜测量系统中，速度伺服系统的控制参数和结构参数是影响速度伺服系统性能的主要因素，且具有时变性和不确定性，采用单一的控制策略很难达到提高速度伺服系统的动态性能的目的。

Simulation of the operating system inside the dynamic allocation of memory space and recovery process, a number of algorithms.

模拟了操作系统里面的动态分配和回收内存空间的过程，有多种算法。

Operating system, experiment, simulation of dynamic allocation of memory, there is documentation to do in detail.

详细说明：操作系统实验，模拟内存动态分配，有说明文档做详细说明。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。