基于MATLAB语言的线性系统校正方法的仿真研究外文文献原文.doc

中 北 大 学 信 息 商 务 学 院毕业论文外文文献原文及译文05031401X18 信息与通信工程李鑫学生姓名： 学号： 自动化理系 别： 王建萍专 业： 指导教师： 2009年 6 月Inves tigation of Controller Des ign Based on MATLABAbstr act: The paper firstly introduces the software of MATLAB by emphasizing its wide applications in different areas. Then, mainamend methods include in series and feedback are summarized. Finally, the article gives the skill to design controller by using MATLABbased on two examples.Keywords: MATLAB; the amend of control system1.MATLAB synopsisMATLAB is the collection value computation, the symbolic operation and graph processing and so on the formidable function in a body science computation language.Calculates the platform as the formidable scientific idea, it can meet all computation need nearly.MATLAB has all developed the function formidable module collection or the labor to many special domains has the box.Generally speaking, they all are develop by the specific domain expert, but the user may be directly with the toolbox study, the application and the appraisal different side method does not need own to compile the code.At present, MATLAB already had the labor the box to extend the scientific research and project application many domains, such as data acquisition, database interface, probability statistics, spline fit, control system department series design, LMI control, robust control and so on.As a result of the MATLAB language in various aspects formidable function, it had taken at present the project and the scientific educational circles one profession standard, more and more many people study MATLAB.2.The control system adjustment method so-called control system adjusts, is joins some its senate number in the system to be possible according to the organization or the installment which needs to change, causes the system entire special to change, thus assigns satisfiedly each performance index.According to the correction in the system connection way, control system school square -like may divide into the series to adjust, the feedback adjusts, the forward feed adjustment and compound adjusts four kinds.The series correction meets generally in front of the system error measuring point and amplifier, serially connects in the system front channel; The feedback school true thing sets meets in the system local feedback circuit.The forward feed adjusts called along feeds the school to be positive, is adjustment way which uses outside the system primary feedback return route.The forward feed correction meets after the system given value (or instruction, reference input signal) and in front of on the primary feedback action point front channel.The forward feed adjusts may alone affect in the open-loop control system, also may adjust as the feedback control system attachment composes the compound control system.The compound adjustment way is in the reaction control return route, joins the forward feed adjustment circuit, composes an organic whole.In the control system design, the commonly used adjustment way adjusts for the series and feeds back adjusts two kinds.Actually selects which adjustment way, is decided in is in the series signal nature, the technical realization conveniences, may supply choice the Yuan, the interference rejection to be able to request, the efficient request, the environment exploitation conditions as well as supposes experience factors and so on counting.3.Based on MATLAB controller design example example 1. designs based on frequency range response in advance - lag controller by reality presently to system adjustment.Napier the Quist stability criterion is through makes the judgment to the split-ring transfer function frequency response analysis to the closed-loop system stability, similarly, we may design in advance - the lag controller in the system frequency response foundation, enable the system to have the small static error, when short rise and small over.Uses in controlling the feedback design feedback system mold like chart 1. chart 1The example 2. designs realizes based on the system mode equation sight air-operated controller to the system adjustment.The Li criterion is the establishment in the state space equation foundation, we may by design the sight air-operated controller in the system equation of state foundation, comes to carry on the adjustment to the system, the improvement system performance, satisfies the application to have to ask.Because causes by the initial condition and the reference input the system transits the regulation characteristic to be decided directly by the extreme, therefore the extreme disposition design goal is uses the feedback to enable the system the transient process to be able may accept in one in the time cycle weakens vanishing.If a system is can control, but its all variables available in feedback, then may apply the entire condition feedback to control the system the closed-loop system extreme disposition in the S plane random position.But however, in the reality system, as a result of physical or the economical reason, we is not all carries on the survey to all state variable.Observes may by from the system input restructuring system mode, thus may use in realizing the entire condition reaction control.R(t) refers to the input, we mainly study are the single input, the multi-output system, therefore r(t) is one with y(t) with Uygur p1 the vector.pp Uygurs gain matrix N took a normalized constant introduction, D= 0 oclock, the sight air-operated controller state space equation isX(t) is the system mode variable, is the sight condition to the quantity, uses for to carry on the estimate to X(t), Nr(t)- y(t) is the controller input, u(t) is this controller scalar output.Therefore, in the state space model, the coefficient matrix is A- BF- LC, the input matrix is - L, the output matrix is - F.In order to assign the state space model designs a sight - to control the regulator type.Using feedback gain matrix F and sight gain matrix L the closed-loop system extreme disposition the position which assigns.Definite controller zero and extreme.The establishment closed-loop system model and the certificate closed-loop system extreme in assigns in the position.Determination like chart (4) gain N, by obtains the zero static error which more responds to the step.The plan closed-loop system state variable response, in which X(0) has the discussion system to give, also has the sight condition to change measures , r(t)=0.Finally draws up the step which under the initial condition the closed-loop system reference loses into more to respond.4 conclusions in summary, the industry ethernet control system compares with other control system has the very big superiority, may apply in many kinds of industry control gets the territory.Along with integrated circuit, industry ethernet and embedded Internet engineering research further thorough, will be able to arrive very quickly based on the ethernet industry control network time, and will become most has the open industry control network body will be the structure.This kind of new network system, echoes with the field bus in the ethernet aspect development, is one changes the leather to the traditional industry control network, will certainly to bring the new world for the industry control domain.But, in certain domains for example: Automobile control system, numerical control engine bed and so on, because its work strip bad, timeliness, the reliability request high, does not suit the industry ether network.Looked from the present tendency that, the industry ethernet enters the scene control level not to need to doubt.But now looked like at least that, it also with difficulty completely substitutes for the field bus, takes the real-time control correspondence the sole standard.The field bus which will have still continued in very long section of times to exist, the most impossible situation will be sends unfolds one kind of many kinds of network coexisting the mixed style control system.5 concluding remark this article mainly introduced uses MATLAB to design the controller the side method.Emphasized with emphasis first must understand the control system adjusts the main side -like, knows when each kind of adjustment method application explicitly key point and difficulty.Its time through the comparative analysis, chooses the appropriate adjustment method.Finally unified has the body the example to elaborate uses MATLAB designed the controller skill.Network band width maximum use factor and best real-time performance.It evaded completely has exempted CSMA/CD, the host from, the token and so on the possible low efficiency; 2 adopted special regarding the different industry environment network equipment