Having Dynamic evaluated when off screen

Question

As the title says, I want a cell containing the dynamic solution of a DAE-System to be available over the whole document. I use a lot of different Plots and Sliders scattered over the document and it is pretty annoying that after the cell scrolled off screen, the dynamic stuff stops working altogether (as this is the nature of Dynamic as the documentation explains it). If I copy Dynamic[Solution] and insert it all over the place everything works perfectly fine but does of course look unprofessional. Therefore I tried DynamicWrapper["This is a text", Dynamic[Solution]] to hide Dynamic[Solution] inside titles and texts that are scattered around anyway. This does however not work as I imagined it must.

If someone has an idea how to comfortably solve the issue I would be glad.

Edit: The system is a scale that works by compensation method; some code:

This is my variable called solution

solution = 
Dynamic[sol2 = 
Quiet[NDSolve[{d1'[t] == d2[t], 
d2'[t] == k*d1[t] + b*d2[t] + (ki*l)/\[Theta][t]*d3[t] + (l*g)/\[Theta][t]*
         (mersatz - mass[t, offset, Mass]), 
d3'[t] == -((ki*l)/L)*d2[t] - R/L*d3[t] + (U[t] + Uoffset)/L, 
U[t] == kP*U2[t] + kI*IntegralPart[t] + kD*U2'[t], 
U2[t] == -ks*l* d1[t],
D[IntegralPart[t], {t, 1}] == U2[t],
d1[0] == 0, d2[0] == 0, d1'[0] == 0, 
d2'[0] == (l*ki)/\[Theta][0]*Uoffset/R + (l*g)/\[Theta][0]*
          (mersatz - mass[0, offset, Mass]), 
  d3'[0] == 0, d3[0] == Uoffset/R , U[0] == 0, U2[0] == 0, 
  IntegralPart[0] == 0}, {d1, d2 , d3, U, U2, IntegralPart}, {t, 
  0, duration}
 ]]]

After that follows a big plot of the measured / calculated load on my scale

PlotWeight = 
Manipulate[
Quiet[Plot[{measuredweight[t] /. sol2, 
 If[referencew == 1, mass[t, offset, Mass], ""]} , {t, 0, 
 duration}, PlotStyle -> {Automatic, Darker[Green]}, 
ImageSize -> {1200, 400}, AspectRatio -> Full,  
ExclusionsStyle -> {Darker[Green], None}, 
AxesLabel -> {Style["time [s]", FontFamily -> font1], 
  Style["measured weight [kg]", FontFamily -> font1]}, 
PlotRange -> {{0, duration}, If[scale == 1, Full, {0, scale}]}]],
Style["      +", 12]
, {{scale, 1, 
Rotate[Style["AxisScale", FontFamily -> font1, FontSize -> 12], 
 90 \[Degree] ]}, 0.01, 1, ControlType -> VerticalSlider}, 
Style["      -", 
12], {{referencew, 0, 
Style["activate weight reference", FontFamily -> font1, 
 FontSize -> 12]} , {0, 1}}, 
ControlPlacement -> {Left, Left, Left, Top}, Alignment -> Center ]

Other variables displayed in interactive Plots are current, voltage, angular velocity, angle, etc. All those are coming from the DAE that is fitted in solution (in the variable sol2 inside of solution).

A full picture in this Pdf.

Answer 1

The following lines copied from the documentation system seem to point at what you need to solve your problem:

FrontEndDynamicExpression -> Dynamic[expr] causes the expression to be tracked and updated in the usual way, except that expr is not displayed anywhere.

FrontEndDynamicExpression can be set using SetOptions[scope,FrontEndDynamicExpression->Dynamic[expr]], where scope can be $FrontEnd or $FrontEndSession.

You may also consider using CellDynamicExpression.

In any case, Dynamic used without any TrackedSymbols specification is usually very inefficient as it will update much more often that what you need, or even, depending on your code, before you need it.