Such a traditional implementation technique induces many problems in the view of reliability and economy because of the amount and complexity of wiring , noise and maintenance problems , etc . in order to remove these problems , a simple synchronization system with the aid of serial communication using can ( controller area network ) is proposed in this paper 因此传统的通信技术可能因为接线复杂、噪音以及数据线的维护而降低系统的可靠性，增加成本。为了解决这个问题，本文提出了一种基于can总线通信的多电机同步控制系统模型。
Combined with the advantages of matrix converter , ac - excited generation technique and vector control scheme , the stator flux - oriented vector control model of the variable - speed constant - frequency ( vs cf ) ac - excited generator fed by a matrix converter was developed . simulation studies of the proposed power generation system were carried out 本文还结合了矩阵式变换器、交流励磁发电技术和矢量控制的优点，建立了矩阵式变换器供电的变速恒频交流励磁风力发电机定子磁场定向的矢量变换控制系统模型，对矩阵式变换器在交流励磁发电系统中应用进行了仿真研究。
The main contents and contributions are listed below : ( 1 ) analysis of the qos guarantee system in the ip network , which includes the protocols , standards and polices . ( 2 ) discuss the structure of the end - to - end congestion control schemes with active queue management ( aqm ) in ip network from the control - theoretic point of view . give out a method to estimate the maximum drop probability of red ( pmax ) in view of tcp sources " maximum window limit 主要研究内容和创新点包括： ( 1 )研究了ip网络中提供qos保证的协议和体制； ( 2 )描述拥塞控制的结构，研究主动队列管理的控制系统模型，给出一种窗口受限情况下red算法的最大丢包率的调节方法，设计了一种用于主动队列管理的模糊控制器，仿真证明了这些队列管理算法的有效性； ( 3 )研究组播qos路由的网络模型和qos约束条件；分析组播路由问题和算法；分析internet中现有主流的组播路由协议的不足之处及其对qos的支持。
Besides , on the basis of the micro - economy - system mode , considering the current level of economic development in china , it is advanced that the level of the macro - tax rate should be maintained in a certain spectruin ranging from 20 % to 28 % according to the analysis of the open - circling , close - circling and robust economy control system 在建立了宏观经济控制系统模型的基础上，通过对开环、闭环和鲁棒性经济控制系统的分析，提出在我国目前经济发展阶段中，宏观税率水平应保持在20 ? 28的区间内。
2 . linearizing the fundamental motion equations of the fighters and then establishing the state equations . using nonlinear control system to control the rudder deflexions , and giving decision - making modeling of the maneuver fighting according to the current combat postures of the enemy ' s and our fighters 2 、通过对空战飞机基本运动方程的线性化,建立其状态方程,运用非线性控制系统模型去控制舵面偏转,并根据敌我机当前的作战态势建立机动作战中的决策模型。
The paper summarizes the development of the control technology of paver ' s vehicle system ; discusses the feasibility of the plc application to vehicle system ; calculates and examines the working resistance and power of the control system as well some concerning parameters of the hydraulic system ; builds the driving system velocity characteristic ; accomplishes the hardware design and the software design according to the functional requirements of vehicle system and the features of plc ; adds the pid compensation to the closed circuit velocity control ; sums up the mathematic model of hydraulic pump - motor system and defines the controller parameters ; in the end , the simple dynamic simulation basing on the control system model and the simulative test are carried out to testify the reasonableness and the feasibility of the designed plc control system 本文总结了摊铺机行驶控制技术的发展，讨论了plc应用于行驶系统的可行性；计算和校验了控制系统工作阻力、功率及液压系统有关参数；建立了行驶驱动系统的速度特性；结合行驶系统的功能要求及plc的特点，完成了控制系统的硬件设计和软件设计；对其速度闭环控制，引入了pid校正环节；归纳了液压泵?马达系统的数学模型，确定了控制器的控制参数；最后对控制系统模型进行了简单的动态仿真和plc模拟试验，初步证实了控制系统设计的可行性和合理件。
The small astronomical satellite has demands on both pointing accuracy and attitude maneuverability , so this thesis modeled the attitude control subsystem based on reaction wheels . under the fine precision pointing mode , a pd control law and a variable structure ( vs ) control law were studied respectively , and the simulation validated that vs control is more effective under fine precision pointing mode . furthermore , the vs controller for rapid large - angle maneuver was also designed 2 ) svom卫星同时对指向精度和姿态机动性有着很高的要求，因此本文建立了基于反作用飞轮的svom卫星姿态控制系统模型，在高精度惯性定向三轴稳定模式下分别设计了pd控制律和变结构控制律，通过仿真验证了变结构控制对于svom卫星的有效性，并基于变结构控制研究了svom卫星快速大角度机动的方法。
