扰动器

For a single machine infinite bus power system with STATCOM connected at the electrical mid point of the equivalent transmission line, a unified and extended linear state space system model is firstly formulated by linearizing around the typical operating point.

针对单机无穷大母线联络线中间带静止同步补偿器的电力系统，建立了统一的状态空间模型；并在此基础上，应用信息结构约束下的LQ最优控制理论和算法，得到输出反馈的STATCOM与机组励磁的最优分散协调控制器；应用数字仿真研究它们在系统受到大小扰动下的控制性能和特点，并与传统的电压偏差PID励磁调节器进行了比较。

It is difficult Boost converter has good dynamic adjustment performance and stability if the system using a single voltage feedback loop get some interference. The reason is Boost converter has a zero point in right half plane.

Boost变换器的开环传递函数有一个位于右半平面的零点，使得使用单一的反馈电压环难以同时保证系统在受到某种扰动作用时，既有很好的动态品质又不致造成系统失稳。

In the full paper which outlines our special design strategy; the two subtopics of topic 2 are the establishment of multi-models and switch conditions （subtopic 2.1） and the analysis of stability（subtopic 2.2）; in subtopic 2.2, based on the book written by Wang et al, we explain how all the controllers can have dynamic performances that are very similar in topic 3, we point out that eq.

首先建立作动器故障参数模型；然后根据故障的随机性，设计一系列并行的辨识模型，每个模型对应一种故障，同时对应于每个辨识模型建立一个控制器；最后根据飞行品质的要求，设计鲁棒跟踪控制器，由于控制器采用了积分项，可很好地抑制扰动。

Realtime optical image processing using induced mutuallypumped phase conjugator.

利用自泵浦相位共轭器对热晕池的扰动激光束的实验研究。

Test result shows that ship speed regulator enhances the ability to restrain disturbance and system with parameter perturbance and improves the stability and speed performance in case of system uncertainty.

仿真结果表明，新的船舶柴油机调速器在系统模型不确定和参数摄动情况下，能在线学习被控系统的动态特性，具有抑制扰动和参数摄动的能力，系统调节过程的稳定性和快速性都有提高。

The Governor model and its parameters obviously affect the calculation results of the steady-state value after the disturbance, and slightly affect the magnitude of first swing of line power.

调速器模型及参数对系统扰动后稳态值的计算结果影响比较显著，而对于功率第1摆幅度影响很小。

The disadvantages of the conventional active frequency drift method in various load conditions are analyzed for islanding prevention.

本文详细分析了传统有源频率扰动法在孤岛效应发生时，在不同负载特性下并网逆变器输出频率的变化特点和不足。

In this paper, research is focused on the heat and mass transfer features during absorption process on the two-scale corrugation plate surfaces of plate-shell heat exchangers. This new Kind structure has vertical large corrugations and horizontal small ones, which can enhance the convection heat transfer of cooling water at internal plate channel side and make the liquid falling film uniformly distributed and turbulent by twisting path, so that the heat and mass transfer characteristics at both sides can be enhanced while sufficient flow area for adequate resistance requirement is also met.

本论文围绕一种新型交叉双尺度波纹板片组成的板壳式吸收器进行研究，这种新型传热元件的相邻板片的竖直大波纹相顶靠，形成曲折的板内通道和菱形板外通道，可强化板内侧冷却水的对流传热，而其水平小波纹则可对布膜的溴化锂浓溶液和冷剂蒸汽产生连续的扰动，使液膜分布均匀，传热传质得到强化。

Lightened on the turbine valve controller designed with feedback linearization theory and introduced nonlinear tracking-differentiator, a novel nonlinear PID valve controller was proposed. This controller can fit not only to plant with some model error and random disturbance in variable, but also to the variety of the structure and operating conditions of power system. The transient and dynamic characters of the controller are both satisfactory when big and small disturbances added. The good performance, wide stable margin and heavy robustness of the valve controller proved that it is a great practical application to enhance the stability of power system.

结合反馈线性化法汽轮发电机组的汽门控制研究成果，引入非线性跟踪微分器和非线性度变换控制，进行了发电机组的非线性PID汽门控制器设计，该控制器不仅能适应一定的系统模型误差与变量的不确定性干扰，而且对于电网结构和运行工况的变化有着较强的适应能力，在受大、小扰动的情况下，呈现了较好的暂态特性和动态品质，具有较好的控制品质、较高的稳定裕度和较强的鲁棒性能，有利于进一步改善电力系统的稳定性，显示了其较强的实用性。

Besides, in order to eliminate the effect of grid voltage distortion or disturbance on output current, decoupling control is employed to further improve the quality of output current.

此外，为了消除电网电压畸变或扰动对逆变器输出电流的影响，系统中引入了电网电压前馈解耦控制，改善了系统输出电流的质量。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐