Sep 11

transfer function input output

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Help has been resolved! Known input and output data, how to build the transfer function in MATLAB? ? Reward points: 50 -
Address, 2010 -7-14 19:54
Matlab expert to help! Currently, I have several sets of data: time, input data, the corresponding output data. My question is, how to build input-output transfer function? ? What method, or kit it? Can an example? Is very important to ah, make sure to help me master this busy! Some details of that very grateful! ! Asked by: scorpion text - four best answer
A system identification problem, the problem, you can try to complete deconv function, this function is deconvolution, which is solved through the input-output system, or by solving the input-output system 2 the best way is using neural network modeling. Several sets of input data to output data as input and output. Train the neural network, the demand factor is the weight! Identification of the completion of its transfer function. Of these, good luck! 1
Respondents: andyandyandysu - II 2010-6-30 21:53 I have to comment on the  questioner for the evaluation of the answer:
Thank you! ! Related Content
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It is hard to say in detail, the problems related to system identification, you can try to complete deconv function, this function is deconvolution, which is solved through the input-output system, or by solving the input-output system.
Respondents: lskyp - five 2010-6-30 17:13
If you know exactly what it is a linear time-invariant system, then like a major anti-convolution
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transfer function input output

Here a mathematical model based on electrical systems -> structure -> the signal flow diagram -> Transfer Function -> Simulation -> theoretical results and simulation results of the comparison. Analysis.
(1) mathematical modeling
Firstly a system schematic, analyze. To find out the status of the system (energy storage components, nothing more than capacitors and inductors); input and output;
Under normal circumstances can be listed under the KVL KCL equation of state; according to the schematic and list the output equation.
With the state and output equations, even built a mathematical model.
(2) According to the mathematical model of the system structure to draw
Note: The structure of a system and signal flow diagram is not unique, but among them are equivalent.
Give the model state variables, input and output of each to a node. Order from left to right connection for each node (line, there are gain).
Discrete dynamic system with differential, continuous dynamic systems integrator and differentiator.
This will complete the system structure
(3) The structure of the picture signal flow chart of the system
Differentiator corresponding to 1 / Z, corresponding to the integrator 1 / S, the corresponding differentiator S, the structure of the state point to find out, respectively, and point to add, input, output point, the state point distribution node. According to the forward or feedback, from left to right draw. Will complete the signal flow chart.
(4) According to the signal flow graph and Mason rule to determine the system's input-output transfer function
For single-input single-output system, if the signal flow diagram with system structure or the rules so you can get under the Mason system transfer function. Need to introduce a few concepts before once again:
Source node: the input nodes; well node: output contacts;
Forward path: input to output without loop path. Path gain is the product of each branch.
Circle: The signal for the beginning and end of the path of the same node. Path gain is the product of a slip.
Mason rules: First, the system first, before calculating the number of channels; (the specific formula, can not write here);
Each unit is always calculated after the addition and to get the system transfer function.
(5) simulation
Simulation process is: first write the state function (including input); in writing the main program (with a certain algorithm to calculate the equation of state functions); drawing can be
(6) calculated
Calculation is through input and system transfer function (that is, the system impulse response) to calculate the system output.
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for single-input, single-output systems, scalar signals are generally used. the transfer function modifies its input signal and outputs a new signal on a line to the scope.
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transfer function. the transfer function of a linear dynamical system is the ratio of the laplace transform of its output to the laplace transform of its input.
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the transfer function is the ratio of the output laplace transform to the input laplace . once the transfer function is entered into matlab it is easy to calculate the .
2011/09/15 16:06
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2011/09/15 20:03
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2011/09/25 16:25
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2011/10/05 02:27
depending upon the input source and the output expression the transfer function calculated can be: . current gain: input current source and output expression = i(rl) .
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these two types of transfer functions cover all the cases and one can find the poles/zeros of functions like input/output impedance and voltage gain.
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types of analysis
2011/11/20 10:42
if the transfer function is linear then this is the only case when the output will be the same as the input. in any other case, the output produces distortion.
2011/12/15 21:37
40hz studio - chania - crete
2011/12/27 00:30
what is a transfer function - is it just a relation between output/input or is it the 'time response' relation between the output & input.
2012/01/09 11:00
re: what is a transfer function? (reply posted by curt wuollet)
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