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Lab

Lab. Neural Networks based control of nonlinear systems. Identification of dynamic systems with Artificial Neural Networks. Dynamic/ feedback network:. Eduard Petlenkov, Automaatikainstituut, 201 3. Identification with Artificial Neural Networks. is theinput of the system and the model.

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Lab

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  1. Lab Neural Networks based control of nonlinear systems

  2. Identification of dynamic systems with Artificial Neural Networks Dynamic/ feedback network: Eduard Petlenkov, Automaatikainstituut, 2013

  3. Identification with Artificial Neural Networks is theinput of the system and the model is the output of the system is the output of the model Eduard Petlenkov, Automaatikainstituut, 2013

  4. Identification with Artificial Neural Networks Eduard Petlenkov, Automaatikainstituut, 2011

  5. Inverse model Eduard Petlenkov, Automaatikainstituut, 2013

  6. Inverse model Consider a system: Eduard Petlenkov, Automaatikainstituut, 2013

  7. Inverse model based control Siin Eduard Petlenkov, Automaatikainstituut, 2013

  8. Inverse model based adaptive control Eduard Petlenkov, Automaatikainstituut, 2013

  9. Example: Jacketed CSTR (Continuous Stirred Tank Reactor) Input-Output equation:

  10. Collecting input-output data

  11. Training of inverse model td=1 N=size(output,1) P=[output(3:N)';output(2:N-1)';output(1:N-2)'] T=input(2:N-1)' global net_c net_c=newff([0 1; 0 1; 0 1],[5 1],{'tansig','purelin'}) net_c.trainParam.show=1; net_c.trainFcn='traingd'; net_c.trainParam.epochs=3000; net_c=train(net_c,P,T)

  12. Implementation of the controller in MATLAB (m-file controller.m) function control=controller(u) global net_c control=sim(net_c,u);

  13. Control scheme

  14. “dynamic_controller” block

  15. Adaptive control scheme

  16. “adaptive_dynamic_controller” block

  17. Adaptive controller = function “controller_adaptive” (m-file controller_adaptive.m) function control=controller_adaptive(u) global net_c inp=u(1:3); error=u(4); time=u(5); control=sim(net_c,inp); if time>10 net_c=adapt(net_c,inp,control+error); end

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