New version of InvertedCraneCrab and Ideas for Step1-3

[RaphaelGebhart]

I created a new version of the InvertedCraneCrab Example (model + inversionBlock) + model (and secondOrder-filter instead of firstOrder-filter) because initial values for both phi and w are necessary to enable inversion.

I also created models Step1_FreeBody2, Step2_FixedBody2 and Step3_Pendulum3 that show what people could change for the workshop:

1. Step1_FreeBody:

• Double klick body to change parameters:
  -- Set initial values v.start={5,5}, change the simulation time at Simulation.SimulationSetup to StopTime=1 and simulate with animation
  -- Check the animation. Zoom out, if you cant see the body
  -- Create a plot with y(t) = r [2] (t) and x(t) = r [1] (t)
  -- Create a parametric plot y(x)

2. Step2_FixedBody
   Change the rod to a springDamper with spring constant c_y = 10 N/m, and try different damping constants, e.g. d_y = 0, 3, 6, 12. (d = 2sqrt(cm) is kritisch gedämpft)
3. Step3_Pendulum
   Add a horizontal spring with c = 100 N/m either using PlanarMechanics.Parts.Spring (set c_y = c_phi = 1e-9) or using Modelica.Mechanics.Translational.Components.Spring (you need 2x PlanarMechanics.Joints.Prismatic and 1x PlanarMechanics.Joints.Revolute in addition