反馈控制系统

This paper describles a multipleloop voltage instantaneous feedback inverting power supply based on digital PID control arithmetic.

介绍一种基于数字 PID控制算法的电压瞬时值反馈逆变电源，分析了其控制算法及控制框图，仿真表明该系统具有良好的输出响应特性。

Fourth, we have developed a new hybrid control strategy by combining state feedback and parameter perturbation for controlling period-doubling bifurcations and chaos in discrete nonlinear dynamical systems.

4提出了参数调节和状态反馈的混合控制新方法，有效地实现了离散非线性系统的倍周期分岔控制和混沌控制。

The paper aim at the three-phase voltage source SPMW-inverter, which is applied in variable-speed wind turbines system, adopts the theory of nonlinear counterchange and nonlinear feedback, creates the three-phase voltage source PWM-inverter's nonlinear model, and deduces it's feedback linearization equation, consequently, the three-phase voltage source PWM-inverter active and reactive current decoupling control is proposed.

该文针对变速风力发电机组系统所用的三相电压型SPWM 逆变器，采用非线性变换和非线性反馈理论，建立了三相电压型 PWM 逆变器非线性数学模型，推导出其反馈线性化方程，从而得出三相电压型 PWM 逆变器有功电流和无功电流的解耦控制策略。

In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. Using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle,"honeycomb"and"snowflower" pattern with different spatial perturbation functions. Different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback.

第二部分，利用延时反馈的空间微扰方法研究了环形腔中二能级介质的光学时空斑图的控制，在不同的微扰函数作用下，出现了滚筒状、四方形、六角形、蜂窝状、同心圆以及&雪花&状等不同的斑图，并且在相同的微扰函数下出现了不同斑图之间的竞争，这种竞争是我们发现的这一具有空间微扰的延时反馈非线性光学系统光学斑图的新特征。

The methods of theory analyses and digital simulation have been used in this thesis and several schemes of strapdown guidance law based on analyzing the performance of several classical guidance laws have also been present according to the characteristics of strapdown Anti-Radiation homing seeker. The stapdown guidance systems were built for a certain Anti-Radiation missile, adopting acceleration autopilot and the attitude autopilot, and the paper has focus on analyzing the performance of low frequency strapdown Anti-Radiation homing seeker. The Approaches of lead correction and dead-zone relay control were given to improve the guidance precision, and also the increasable observability law was attempt and validate.

本文采用理论分析和仿真实验相结合的方法，在对经典制导律进行理论分析和验证的基础上，针对捷联反辐射导引头的特点，提出了捷联制导律多种设计方案，并以某型反辐射导弹为应用背景，分别采用姿态角反馈自动驾驶仪和过载反馈自动驾驶仪构造了捷联制导系统，重点基于反辐射导引头的低频端特性，开展了捷联制导律的导引性能对比分析工作，提出了应用超前校正和带死区继电控制提高制导精度的方法，并对提高可观测性的捷联制导算法的实现思路进行了尝试和验证。

In the third chapter, using the methods of nonlinear feedback functions and Lyapunov functions and combining analytical with numerical methods, the nonlinear feedback methods are introduced and the synchronizations of chaos in Hadley system of aerographs and LFRBM system of physics are realized. Some of nonlinear feedback functions are constructed.

第三章在介绍非线性反馈方法原理的基础上，应用非线性控制的基本思想及Lyapunov函数方法，将解析法与数值法相结合，分别对气象学中著名的Hadley环流和物理学中的LFRBM系统进行研究，找到了一类非线性反馈函数，实现了混沌自同步，并利用Mathematica软件进行仿真实验，数值结果说明了该方法的有效性。

From the experiment and analysis, it can be seen that friction limits realization of high accuracy electro-hydraulic position servo system, movement of any gimbal brings disturbance moment to servo system of other gimbals and the disturbance moment causes error, and, resolution ratio error and setting error of feedback measurement element are directly added to servo system output.

通过实验和仿真可以看出，摩擦阻碍了转台电液位置伺服系统商精度控制的实现，任何一个框架的运动都会对其余框架的伺服驱动系统产生干扰力矩并引起伺服系统误差，反馈测量元件的分辨率误差和安装误差直接反映在伺服系统输出上，对伺服系统的精度有直接影响。

This invention discloses a power control method based on mixed automatic retransmitting mechanism in which the user end checks received data packet and to feed back to the base station ACK message if the result is correct, and the base station sends the next data packet according to the emitting power of last data packet, if not, sends back NA CK message and quality information of received data packet, the base station will adjust the transmitting power of retransmitting data packet and retransmits the said data packet to guarantee the retransmitting efficiency of the data packet, reduce resource lost of the system to the ulmost and reduce signal interference among different users.

本发明公开了一种基于混合自动重传机制的功率控制方法，该方法通过用户端对接收到的数据包进行校验，当结果正确时，向基站反馈ACK消息，由基站按照上一个数据包的发射功率发送下一个数据包，否则，向基站反馈NACK消息，以及接收到的数据包的质量信息，基站根据所述数据包的质量信息，调整重传数据包的发射功率，并重新发送所述数据包，采用上述方案对发送失败的数据包重传时根据数据包的总质量信息配以不同的发射功率，从而可以在保证数据包重传效率的基础上，最大限度地减少系统的资源消耗，减少不同用户之间的信号干扰。

This invention discloses a power control method based on mixed automatic retransmitting mechanism in which the user end checks received data packet and to feed back to the base station ACK message if the result is correct, and the base station sends the next data packet according to the emitting power of last data packet, if not, sends back NA CK message and quality information of received data packet, the base station will adjust the transmitting power of retransmitting data packet and retransmits the said data packet to guarantee the retransmitting efficiency of the data packet, reduce resource lost of the system to the ulmost and reduce signal interference among different users.

抜粋 本发明公开了一种基于混合自动重传机制的功率控制方法，该方法通过用户端对接收到的数据包进行校验，当结果正确时，向基站反馈ACK消息，由基站按照上一个数据包的发射功率发送下一个数据包，否则，向基站反馈NACK消息，以及接收到的数据包的质量信息，基站根据所述数据包的质量信息，调整重传数据包的发射功率，并重新发送所述数据包，采用上述方案对发送失败的数据包重传时根据数据包的总质量信息配以不同的发射功率，从而可以在保证数据包重传效率的基础上，最大限度地减少系统的资源消耗，减少不同用户之间的信号干扰。

This invention discloses a power control method based on mixed automatic retransmitting mechanism in which the user end checks received data packet and to feed back to the base station ACK message if the result is correct, and the base station sends the next data packet according to the emitting power of last data packet, if not, sends back NA CK message and quality information of received data packet, the base station will adjust the transmitting power of retransmitting data packet and retransmits the said data packet to guarantee the retransmitting efficiency of the data packet, reduce resource lost of the system to the ulmost and reduce signal interference among different users.

要约 本发明公开了一种基于混合自动重传机制的功率控制方法，该方法通过用户端对接收到的数据包进行校验，当结果正确时，向基站反馈ACK消息，由基站按照上一个数据包的发射功率发送下一个数据包，否则，向基站反馈NACK消息，以及接收到的数据包的质量信息，基站根据所述数据包的质量信息，调整重传数据包的发射功率，并重新发送所述数据包，采用上述方案对发送失败的数据包重传时根据数据包的总质量信息配以不同的发射功率，从而可以在保证数据包重传效率的基础上，最大限度地减少系统的资源消耗，减少不同用户之间的信号干扰。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。