The paper regards the middle hollow electrohydraulic servomotor as studying object and build the mathematical model , the stability and the frequency response of opened - loop and closed - loop system are analyzed . this paper discusses the influences of steady error and static error on system precision in detail 文章以中空电液伺服马达为研究对象,建立了电液位置伺服系统数学模型,分析了系统的稳定性、开环和闭环的频率特性,详细探讨了系统的稳态误差和静态误差对系统精度的影响。
( 3 ) according to the general rule of software development , the general control structure of dss was designed , and its menu was built . the three subsystems and four support databases of " four databases three functions " were designed and analyzed in detail . the paper also analyzed the working mode of dss and put forward double close loop working mode ( 3 )根据系统软件开发的总原则，对系统的总控结构进行了设计，构建了其总菜单；同时对“四库三功能”系统中的三个子系统和四大支持库群进行了详细分析和设计；此外，对该系统的工作模式进行了研究，提出了双闭环的系统工作模式。
To solve the poor precision problems of dataglove angle outputs , this paper builds human hand kinematic model and fingertip position error model , and gets the precise parameters of human hand model by the parameters identification based on fingertip positions closed loop method 本文针对数据手套关节角度输出精度低等缺点,建立了人手的运动学模型和各指尖位置的误差模型。基于指尖位置闭环的方法完成了人手模型的参数识别,提高了人手模型几何参数的精度,得到了较精确的人手手指指尖位置。
The research result shows : the combined emluator model of the aero - engine and relative parts of the engine control system is an effective way to solve the optimal acceleration problem . sqp is feasible in calculating the aero - engine optimal acceleration process . the more reliable of the emluator model and the more reasonable of the restriction terms is , the better result of the acceleration process can be achieved 研究结果表明：将实时的发动机模型和相关的部分控制器模型联立在一起，可以构成一个闭环的发动机加速过程仿真模型，应用序列二次规划法对发动机加速过程进行寻优计算，使用该计算结果对控制系统中的相关部件进行改进，可以使发动机达到最优过程的加速。
The paper analyzed the basic theory and mathematic model of three phase voltage pwm inverter and proposed one kind of control strategy based on the voltage - current double - loop . it used the exterior loop to control the voltage the eps outputted , and used the inner loop to control the current . simulation testified that the control method could improve the dynamic response character and interference rejection ability 在建立三相电压型pwm逆变器在两相同步旋转坐标系下的数学模型的基础上,提出了一种三相电压型pwm逆变器基于电压电流双闭环的控制方法,利用电压外环实现对输出电压的稳定控制,电流内环实现对输出电流的控制,仿真证明该方法有效地改善了系统的动态响应及抗干扰能力。
So it is important and meaningful to study automatic parking system . in order to master the macrocosmic properties of the automatic parking system , multi - body dynamic model with closed loop is obtained after kinematic and dynamic analysis about this model , which is the base of sample manufacturing and controlling 为此本文建立了自动停车系统本体结构的多体系统模型,并对该系统的运动学和动力学进行了分析,得到了带闭环的多体系统动力学方程,为自动停车系统本体结构的物理样机制造和控制应用提供了坚实的理论基础。
This paper make a study of controller on permanent magnetsyn - chronous motor . the permanent magnetsyn - chronous motor has many virtue such as simply structure and simle solidity etc . with this excellence . it has more and more uses in industry and agriculture . the idea of this paper is to control permanent magnetsyn - chronous motor system through vector control . to solve the problem of pid regulator , we use the fuzzy control and self adaptive pid 本文设计的思路是采用转子磁通定向的矢量控制技术，主电路采用spwm和交-直-交电压型逆变器，其中spwm采用sa4828芯片直接产生，在控制器的实现方面，采用了tms320lf2407型dsp芯片作为主控板cpu ，实现了电流、转速双闭环的控制系统。
The main research contents are as follows . 1 ) the characteristics of semi - process industry based on make - to - order are studied , which means that the purchase tune is long while the due date is short , the working procedures are successive and discontinuous . then the general structure of production system based on make - to - order mode in semi - process industry is put forward , which includes estimate of the dynamic finite resources , evaluation of the order based on rough capability balance , material requirement planning , production plan , order tracing , collection and feedback of the local data etc . they all together form an integrated and closed loop system as a whole 研究的内容主要包括： 1 )研究了半流程制造业面向订单生产模式具有的采购期长、交货期短和工序连续但工序间可间断的特点，并基于此提出了适应半流程制造业面向订单生产的系统总体结构，其主要内容包括动态有限资源能力评价、基于初能力平衡的订单评估、物料需求计划和生产作业计划、以及订单跟踪和现场数据的采集和反馈等，它们在总体上形成了一个集成的和闭环的系统。
At last , we select 3 companies to carry out case studies . based on above analysis , we draw the conclusion that : ( 1 ) for cso , sdc is the capability to integrate and use the knowledge effectively both in and out of the organization in nature and domain knowledge is more important than technology knowledge . ( 2 ) sdc development is based on the closed - loop organizational learning 综合上述分析，本研究认为， （ 1 ）对中国软件组织而言，开发能力的本质是知识整合能力，领域知识较技术知识更为重要； （ 2 ）软件组织要发展开发能力必须在知识获取、传播和存储各环节建立起有效的知识传递和共享机制，形成闭环的组织学习过程。
