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4.3  Non-collocated force-displacement pairs and combinations

The example below illustrates the general definition of actuators and sensors which are not collocated.
In d_piezo('TutoPzBeamNCol-s1') ), the mesh is created and two point sensors are defined as 104-x and 207-y (Figure 4.8)

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Figure 4.8: Point sensors at node 104 in direction x and 207 in direction y

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Then in d_piezo('TutoPzBeamNCol-s2') , two actuators are defined by combination of three forces (207-x, 241-x and 207-y). The first actuator consists in two forces on nodes 207 and 241 in opposite direction along x acting together, and the third force is on 207-y.

%% Step 2 : Define point actuators
% relative force between DOFs 207x and 241x and one point loads at DOFs 207y
data  = struct('DOF',[207.01;241.01;207.02],'def',[1 0;-1 0;0 1]);
model=fe_case(model,'DofLoad','Actuators',data); %

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Figure 4.9: Load combinations for Ubeam

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In d_piezo('TutoPzBeamNCol-s3') and (d_piezo('TutoPzBeamNCol-s4') ), the static and dynamic responses to these loads are computed and represented in Figure 4.10 and Figure 4.11.

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Figure 4.10: Static responses of Ubeam to load combinations

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Figure 4.11: Dynamic response of Ubeam to load combinations u1 and u2, sensors on node 104 in direction x, and 207 in direction y

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