然后将速率限制环节置于人机闭环系统中，利用描述函数法对驾驶员诱发振荡（PIO）机理进行了研究。
With the rate limiting element in man machine closed loop system, we analyse the PIO using the method of describing function.
基于降阶闭环传递函数可对各机组从而对整个多机系统的小扰动稳定性进行有效的分析。
Using reducing-order closed-loop transfer function, small signal stability of each machine even the whole multi-machine system is analyzed efficiently.
同时，给出了切换状态反馈控制器和闭环切换系统的公共李雅普诺夫函数的设计算法。
Meanwhile, the design algorithm for the switching state feedback controllers and the common Lyapunov function of the closed-loop switched system is given.
最后，利用李雅普诺夫函数概念和方法得到了闭环控制系统具有大域渐近稳定性的充分条件。
Finally, by using the concept and method of the Lyapunov function, a sufficient condition for the approximate stability in the large field of the closed-loop control system is derived.
详细分析了预测函数控制在具有参数饱和限制环节和滞后的机电伺服系统中的实施算法，分析了系统的闭环性能，并得到了其稳定鲁棒性条件。
The paper analyses the implementary arithmetic in the servo system with saturation and lag segment, and analyses the performance of the close loop to obtain the condition of stability and robustness.
对于低频扰动，当系统实现闭环控制后，像面上线扩散函数已接近衍射极限。
When the system close -loop controlling is realized for lower frequency perturbation, the approximate diffraction limited line spread function can again be achieved on the image plane.
通过引入积分型变结构切换函数及高增益误差观测器，基于李雅普·诺夫稳定性理论，证明了闭环系统是全局稳定的，输出跟踪误差都收敛到零。
By introducing integral variable structure and high gain observer, the closed-loop control systems is shown to be globally stable in terms of Lyapunov theory, with tracking error converging to zero.
建立了磁浮轴承的近似非最小相位传递函数模型，并基于此模型设计了保证系统稳定的闭环控制器。
An approximate non-minimum phase transfer function of magnetic suspension bearing is established, on the basis of that, a closed-loop controller is designed and makes the whole system stable.
通过分析闭环传递函数的幅频特性，对系统的稳定性进行了判定。
The system stability is determined by analyzing the amplitude-frequency characteristics of closed-loop transfer function.
本文根据最优闭环传递函数，论述最优控制器的设计，对过程控制系统与仪表装置的校正设计有参考价值。
Based on the optimal closed-loop transfer function, a new design method of optimal controller is proposed; which can be widely used to a process control sys-tem and for instrumental calibration.
针对非线性船舶航向保持系统，给出一种基于精确反馈线性化和闭环增益成形算法的非线性鲁棒pid控制器，该非线性PID控制器由非线性函数项和鲁棒pid控制器组成。
For a nonlinear course keeping system for ships, a kind of nonlinear robust PID is presented, which is based on an exact feedback linearization and a closed-loop gain shaping algorithm.
根据闭环系统补灵敏度函数的最大值，从频域角度设计了滤波时间常数，以保证系统具有一定的鲁棒性。
According to the maximum magnitude of the complementary sensitivity function, the filter time constant is calculated to assure the robustness of system.
基于随机李亚普诺夫函数的方法，并结合线性矩阵不等式，分别提出依赖于模态的状态反馈和输出反馈控制，以保证相应闭环系统的严格正实性。
Based on stochastic Lyapunov functional approach, both state and output-feedback mode-dependent controllers are proposed to guarantee the strict positive realness of the resulting closed-loop systems.
针对一类由非线性增益函数与典型PID控制器级联组成的非线性系统，采用波波夫判据对此类闭环控制系统进行稳定性分析。
The stability of a nonlinear control system which consists of a sector bounded nonlinear gain in cascade with a fixed linear PID controller is analyzed using Popov stability criterion.
用李雅普·诺夫候选函数方法，得出了在该控制律作用下的闭环系统在原点具有全局一致渐近稳定性的结论。
By Lyapunov candidate function method, this paper concludes that the closed-loop system is globally uniformly asymptotically stable at origin.
对PWA模型的状态区域进一步的细化凸划分，以增加找到分段二次lyapunov函数的可能性，减低闭环系统稳定性分析的保守性。
Further convex partitioning of the state's regions increases the possibility of finding the piece-wise quadratic Lyapunov functions, which reduces the conservativeness of the stability analysis.
为了提高系统的稳定性，抑制滤波器的谐振，在双闭环控制的基础上提出了一种基于虚拟电阻思想的控制策略。通过对滤波电容电流的积分处理，改变了系统传递函数的极点，确保了系统的稳定运行。
To suppress resonance of LCL filter and improve stability of system, it is pre - sent that a voltage and current double loops control strategy based on virtual resistor concept.
为了提高系统的稳定性，抑制滤波器的谐振，在双闭环控制的基础上提出了一种基于虚拟电阻思想的控制策略。通过对滤波电容电流的积分处理，改变了系统传递函数的极点，确保了系统的稳定运行。
To suppress resonance of LCL filter and improve stability of system, it is pre - sent that a voltage and current double loops control strategy based on virtual resistor concept.
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