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Questions tagged [system-identification]

Questions about "system identification" in the sense of control theory.

Questions about "system identification" in the sense of control theory. I.e. how to calibrate a model for the behaviour of a dynamic system.

See also https://en.wikipedia.org/wiki/System_identification

For questions on how to uniquely identify a client system, e.g. based on hardware serial numbers, the hardware-id tag shall be used.

50 questions
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Unique System ID in Ruby ...?

Is there a way to generate an unique Hardware dependent Identification key in Ruby...?
pankajdoharey
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5 answers

Python: Identifying a State Space Model for a System

I am looking to obtain a state space model for a system I have, using python. I have tested the actual system, so I have the inputs to it and I have measured the outputs. so I have sets of corresponding inputs and outputs. Is there a function…
Ahmed J
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4
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1 answer

non-linear grey box System identification with Matlab

I am trying to to a non linear grey box model identification and I am using the following code. I have my measurements for the input in input vector, output vector and time stamps in time. input = output_data(2:3,:)'; output =…
Fardin Abdi
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3
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1 answer

MPC with ARX Model Using Gekko

I am modelling an MPC to control a fridge and keep the temperature within a given interval while minimizing the cost. I am using GEKKO to model my algorithm. I wrote the following code. First, I identified my model using sensor data from my system…
tt40kiwi
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3
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1 answer

Gekko SysId - Temprature System Identification

I am currently working on developing an MPC to optimise the costs of a fridge. Therefore I need a model of my system. For the modelling of the algorithm, I used GEKKO. Now I am trying to identify my system using the function "sysid" also found in…
tt40kiwi
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3
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1 answer

How to build an ARMAX model in Matlab

I'm trying to build an ARMAX model which predicts reservoir water elevation as a function of previous elevations and an upstream inflow. My data is on a timestep of roughly 0.041 days, but it does vary slightly, and I have 3643 time series points.…
Amy
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2
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Determine a computer ID in Flash/AIR game

I'm creating an online multiplayer game in which I want to prevent players from joining a game using multiple clients/accounts on one computer. I can't simply do a server sided check for the IP-address because I still want e.g. people in the same…
Bart van Heukelom
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2
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1 answer

convert matlab system identification to python

I have a piece of code in Matlab that I want to convert to Python. The Matlab code is using the system identification toolbox which is provided here: Ts = 1; Znl=iddata(Xdati(:,2),Xdati(:,1),Ts); z=iddata(Xdati(:,1),Xdati(:,2),Ts);…
abdullatif alnajim
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How to merge multiple custom regressors into one custom regressor in Matlab?

I want to merge multiple custom regressors as a function in one custom regressor. Ex: x1Dot=@(u1,u2,u3,x1) u2*x1^0.3 + u1 + u3; x2Dot=@(u2,x1,x2) u2*x1^0.3 + x1^0.3 + x2; cr1=customreg(x1Dot,{'u1' 'u2' 'u3' 'y1'},[1 1 1…
M.J Jalali
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Matlab: Concatenating single-channel models to a multi channel model with System Identification Toolbox

I have the following problem: I have a SIMO system and I want to apply subspace identification algorithm (MOESP in the specific case) using the Matlab function n4sid (which performs subspace identification of state space models) of the System…
roschach
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Can hardware information by obtained on a device that interacts with a Java servlet?

Is a way to gather hardware information to uniquely identify a certain device (not a category) that makes requests to a Java servlet ? I searched for this, but I don't think there is a method ( "user agent" header can be used for some information,…
Andrei F
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Simulating non-linear ARX model doesn't work

I estimated a non-linear ARX model with the sytem identification toolbox in matlab and tried to simulate the response to a validation data set. Unfortunatly the response seems to be not stable and doesn't lead to the results obtained from the…
Fibaro
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1 answer

python implementation of matlab "d2c" function

I'm trying to convert a discrete transfer function to a continuous one (z to s) in python. It works perfectly fine in Matlab: >> H = tf([0.0, 0.00011109058274028799, 0.0, 0.0, 0.0, 0.0],[1.0, -4.746477630953663, 9.128106677145524,…
Beginnerlevel
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Set initial values in simulink idmodel block for an identified process model

I used system identification tool to obtain a state space (order 2) and a process model (2 inputs, 1 output, 2nd order transfer function + delay each) of some data. The models show very nice fit to experimental data in the system identification…
SOf_PUAR
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Is there a way to make an R function return its internal variable?

I am new to R. I am currently trying to implement a regression based on instrumental variable from the sysid R-package. I chose this package since it can predict my instrument. I found a suitable method ("iv" is the function here) to solve my…
Praveen Kumar
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