Identifying a Non-Linear Parameter Varying System

  • Thread starter Thread starter FaroukSchw
  • Start date Start date
  • Tags Tags
    Identification
AI Thread Summary
The discussion focuses on identifying a non-linear parameter varying system represented by a set of equations involving variables Y1, Y2, Y3, and Y4, which depend on previous time steps and inputs U1, U2, and U3. The user seeks guidance on algorithms suitable for identifying such systems, indicating a need for effective modeling techniques. A PDF containing the model is referenced for clarity, suggesting that the equations may be complex and require careful analysis. Participants are encouraged to share insights or recommend specific algorithms that could assist in this identification process. The discussion highlights the challenges of working with non-linear systems and the importance of selecting appropriate computational methods.
FaroukSchw
Messages
6
Reaction score
0
Hello guys, i am trying to identify the following non linear parameter varying system.
\begin{equation}
Y_1(t_{i})}=\frac{Y_1(t_{i-1})+\Delta t.k_{1}.Y_2(t_{i-1})}{\left(1+\Delta.t.\left(k_{1}.Y_2(t_{i-1})+k_{2}.Y_3(t_{i-1})\right)\right)}
\end{equation}

\begin{equation}
Y_2(t_{i})=\frac{U_1(t_{i})}{\left1+\frac{M_1}{U_4(t_{i})}(a\lefta.\frac{1}{2}.k_{1}.Y_1(t_{i})+b.\frac{1}{2}.k_{4}.Y_3(t_{i-1})\right)\right}
\end{equation}

\begin{equation}
Y_3(t_{i})=\frac{U_2(t_{i})}{\left1+\frac{M_2}{U_4(t_{i})}(\left a.k_{2}.Y_1(t_{i})+b.k_{4}.Y_2(t_{i})\right)\right}
\end{equation}

\begin{equation}
Y_4(t_{i})=U_3+\frac{M_3}{M_2}\left(U_2(t_{i})-Y_3(t_{i})\right)
\end{equation}

Does anybody has an idea about the algorithm that can be used?
Regards
 
Engineering news on Phys.org
It seems that i din't write with .tex well, here is a pdf containing the model.
 

Attachments

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
Thread 'How Does Jaguar's 1980s V12 Dual Coil Ignition System Enhance Spark Strength?'
I have come across a dual coil ignition system as used by Jaguar on their V12 in the 1980's. It uses two ignition coils with their primary windings wired in parallel. The primary coil has its secondary winding wired to the distributor and then to the spark plugs as is standard practice. However, the auxiliary coil has it secondary winding output sealed off. The purpose of the system was to provide a stronger spark to the plugs, always a difficult task with the very short dwell time of a...
Back
Top