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The annual admissions upsurge again. Each school has its own corresponding line, it is different for the "height" of tailored to the students.
A small boy was so worried because he's "height" and his right of that school fractional line difference. The good school, "shape" must be long "higher", the children understand that, therefore, his face.
The child's father seemed to see a child's mind, he had arranged his comfort children, children don't worry, indeed, wily conciliator, he should know, in this city, he is a successful businessman.
Responsible for the recruitment of have no good lady glanced at children, then beckoned children to measure "height" next. Child anxiety and looked at the head of the fractional line, geez, that a few records
Take, for higher than he had a head.
At this time, my father again from the purse out of money, he folding money expertly mat in the child's feet. A head of the distance covered by large sums of money, the child's head
Finally a line.
Admissions lady suddenly smiling, and then to the father of satisfaction, said: "hey, good, qualified ~e68a84e799bee5baa6e79fa5e98193330"
技术性太强了，要清晰表达难度不小，确实应该加分！！
本文首先介绍了磁悬浮平台和直线电机发展历史和相关控制技术的基本原理，阐述了一种基于磁悬浮支承结构的永磁同步直线电机直接进给单元结构；接着推导了永磁直线同步电机的数学模型，根据这636f7079e799bee5baa6e997aee7ad94338个模型来讨论当前应用于永磁直线同步电机的主要的控制策略；深入分析基于FOC控制策略的永磁直线同步电机速度伺服控制系统工作原理；利用MATLAB/Simulink平台，搭建了基于PI控制器的直线进给系统仿真平台，对电机的运行过程做了仿真，给出并分析了仿真结果。
Firstly, this paper introduces the development histories of Maglev Platform and Linear Induction Motor, as well as the basic principles of the related control technology; it describes the direct feed unit structure of Permanent Magnet Synchronous Linear Motor (PMSLM) based on Maglev Support System, followed by the inference of mathematical model of PMSLM, and uses this model to discuss the principal control strategy presently applied in PMSLM. Then, it conducts an in-depth analysis on the working principles of PMSLM Speed Servo-control System based on FOC control strategy; and by applying the MATLAB/Simulink Platform, it constructs a simulation platform for linear feed system based on PI Controller, so that a simulation was done on the motor’s running process, and the result is presented and analyzed.
针对参数摄动与环境扰动等不确定因素对进给运动的影响，提出了一种永磁直线同步电机速度伺服鲁棒最优控制，设计了相关控制器，并在MATLAB/Simulink平台下搭建了仿真系统，对电机的运动过程做了仿真，通过两种控制策略下的仿真结果比较，验证了鲁棒最优控制在改善系统性能上的正确有效性。
In view of the impact on the feeding motion by various uncertain factors such as parameter perturbation, environmental disturbance etc., this paper proposes a robust optimal speed servo-control for PMSLM, together with the relevant design for the controller; thus, a simulation system applying the MATLAB/Simulink Platform was constructed as well as a simulation on the motor’s running process. By comparing the simulation results of the two control strategies, it proves that the application of robust optimal control for the improvement of system performance is correct and valid.
Letter of Declaration
To
Second Subsidiary Hospital to Zhejiang University Faculty of Medicine
As our company, Berkeley Advanced Biomaterials, Inc. is unable to send our representatives to Zhejiang Province, China, we hereby entrust our sole and unique general agent - Shenzhen Berkeley Medical Instruments Co., Ltd. - with full power to act on behalf of our company in matters whatsoever arised in the course of and in relation to this bidding.
This Power of Attorney shall be valid as of the date of bidding till the date on which the contract is fully performed.
蛮费e68a84e8a2ad7a686964616f366劲，盼采纳。
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