查询词典 loop control

The sufficient conditions to guarantee robust exponential stability for the closed-loop systems are obtained based on Linear Matrix Inequality, moreover, the approach of design of robust H# output feedback controller is introduced.3 The problem of reliable H# control for a class of Lur"e systems with polytopic uncertainties is studied when all control components are operational as well as when some control components experience failures, the design approach of reliable H# controller is also obtained.4 Considering a class of uncertain Lur"e singular system with time-delays, the problem of robust stability is investigated based on Barbalats Lemma and nonsingular linear transformation of model reduction.

针对一类不确定Lur'e奇异时滞系统，基于Barbalat引理以及非奇异降阶变换，讨论了Lur'e奇异时滞系统的鲁棒稳定问题，提出了鲁棒H_∞状态浙江大学博士学位论文反馈控制器的设计方法。5、针对一类具有饱和执行器的不确定Lur'e奇异系统，提出了时滞依赖的鲁棒稳定与鲁棒二次镇定的充分条件，所的结果不需要参数的整定。6、针对任意协方差有界的有色噪声，讨论了一类不确定Lur'e奇异系统的鲁棒凡滤波问题，得出了鲁棒几滤波器设计的充分条件。7、针对一类不确定Lur'e时滞系统，通过线性变换，把它转换成奇异系统，根据奇异系统鲁棒控制理论所得出的鲁棒稳定与鲁棒镇定控制器设计的充分条件具有很小的保守性。

Analysis of application effect proves that strip flatness error can be well controlled in the scope of 0～3 I in stable rolling condition and close loop feedback control method satisfies the need of high precision control for cold rolling strip flatness. cold rolling ; Clecim AFC system ; multivariable optimum control

本文对国内某厂引进的Clecim冷轧AFC系统的控制原理和控制特点作一介绍，并对实际的板形控制效果进行分析说明。1闭环反馈控制原理Clecim冷轧AFC系统的控制原理如图1所示，板形检测值与目标板形相比较得到板形误差分布，通过多变量优化控制求

A invariable -angle control circuit of parallel resonance converter which can get high precise control of inverter operating state is designed. Using the technique of phase-lock loop, the circuit implements automatic tracking to inverter operating frequency and constant control of capacitive power factor angle.

论文设计了能在频率自动跟踪的基础上实现高精度的逆变器运行状态控制的并联型逆变器定角控制电路，该电路采用锁相环技术，实现了逆变器工作频率的自动跟踪和容性功率因数角恒定控制。

The model included speed control, load control, valve management, valves test, RUNBACK, overspeed protection, LDA, CIV, ETS, RSM, MEH, gland seal system etc, discussed the strategy of valve management, RSM, control loop smooth switching with emphasis.

模型包括了转速控制、负荷控制、阀门管理、阀门试验、RUNBACK、超速保护、甩负荷预测、中压调门快关-快开、紧急跳闸保护、转子热应力控制、MEH控制和轴封控制等功能，重点讨论了阀门管理策略、负荷控制回路无扰切换策略和转子热应力控制策略，对实际系统尚未投入使用的甩负荷预测和中压调门快关-快开功能也进行了建模仿真。

Aiming at expansion valve control loop in refrigeration system,the predictive control based on neural network is proposed to control the superheat in evaporator.

针对制冷系统膨胀阀控制回路具有时滞、非线性的特点，提出了将基于RBF神经网络的预测控制用于蒸发器过热度的控制。

The analysis result proves that the design for improvement is more suitable for the design of longitudinal control laws for HALE tailless flying-wing UAV because the autopilot of flight control system is always in-the-loop, it is not necessary to consider the stability augmentation performance of control system such as traditional method.

分析结果表明，由于无人机飞控系统的自动驾驶仪是始终在环的，不必像传统方法一样考虑带有增稳的控制系统的稳定性。因此，改进的设计方法更适合于无尾飞翼式高空长航时无人机巡航状态的纵向飞行控制系统的设计。

The main contents are as follows.1 For the state control problem in closed quantum systems, according to the distance between states, the error between states and the average value of an imaginary mechanical quantity, three Lyapunov functions are chosen, respectively. The corresponding control law designs and the convergence analyses are studied. Especially, for the Lyapunov function based on the distance between states, a class of control laws that can solve the problem that an initial state is orthogonal to a goal state is designed. The convergence of the system is analyzed via LaSalle\'s principle and one method to find the largest invariant set of the closed loop system is proposed by linearizing the unitary evolution operator at the corresponding instants.

在这一背景下，本论文在指出研究量子系统控制的必要性、回顾量子系统控制理论和方法的研究现状的基础上，从控制理论的角度研究Lyapunov理论和最优控制理论对于封闭量子系统的应用以及开放系统中的若干问题，主要内容包含以下几个方面。1针对封闭量子系统中的状态控制问题，根据状态间的距离、状态间的偏差、一个虚拟力学量的均值，分别选择三种Lyapunov函数进行相应的控制律设计和收敛性分析。

This control system includes main control model, current detection, position sensing, fault detection and protection, serial interface. Anisomerous bridge topology structure is adopted to design the power converters and driver circuit. Double closed loop based on velocity and current is adopted to control AC-motor.

其控制电路主要包括主控模块、电流检测模块、位置传感器模块、串口电路、故障检测和保护电路等；采用不对称桥式扑结构设计了功率变换器及其驱动电路模块；采用速度和电流双闭环的形式，完成对交流电机的控制。

Simulations are given for all control schemes designed in this dissertation, and they show that the control schenies can not only ensure the global boundness of all closed-loop signals, but also have good control effects (that is, the steady output tracking error is very small).

本文对所设计的所有控制方案都进行了仿真研究，仿真结果表明，这些控制方案不仅可以保证闭环系统所有信号的全局有界性，而且可以获得很好的控制效果（即稳态输出跟踪误差很小）。

Adopt AT89S51 MCU as the main part to realize the automatic control of the object motion locus in this design, system using multiturn potentiometer to measure the position of object, and introduces local closed-loop feedback control system link to correct error, in that case system can improve the accuracy of control and orientation.

设计采用AT89S51单片机作为核心器件实现对物体运动轨迹的自动控制，通过多圈电位器实现对悬挂物位置的精确测量，并引入局部闭环反馈控制环节对误差进行修正。以达到对物体的控制和对坐标点的准确定位。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。