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Introduction:
Introduction:
Task Description: Using a light source in front of the 3D printed Payload in a dark room, measure shading angles for each sample row. This test defines the required angles for the ADCS.
Completed: 20 Aug. 2020
Documented by: Ali
Resources Required: EM payload module, Protractor Circle Diagram, free rotating circular plate, LED focusing flashlight
Verification Activities: V-PLD-0020
Pass Criteria:
Verify that the maximum sun vector angle in X, Y, and Z axes before samples are shaded is at least 24 degrees from the sun-vector.
CAD-Based Analysis:
CAD-Based Analysis:
We measured the distances between the edge of each sample and the payload structure to calculate the theoretical shading angles for each row. As shown below, X-axis measurements were measured between the front of the module (which will be flush with the corner rails) and the back of each sample. Y-axis measurements were taken from the inner-edge of the rail to the closest edge of the samples. Z-axis measurements were taken from the upper edge of the payload opening and the top of each sample.
Figure 1: Payload CAD model
Test Procedure:
Test Procedure:
Print a Protractor Circle Diagram and stick it to a free rotating circular plate.
2. In order to put the payload module exactly in the middle of the plate, we need to draw centerlines of the payload’s top side.
3. Now, we put the plate in its place in the microwave’s cooking chamber. By removing the turntable motor, the plate and the payload on it can freely rotate. Then, we mark the center of the microwave’s edge and calibrate it with the plate in order to measure angles.
4. For the light source, we use a Husky 350 Lumen LED focusing flashlight. It provides more directional light in its focused mode.
5. In a dark room, put the flashlight in front of the chamber. The flashlight must be directly pointing to the center of the chamber.
6. Rotate the plate and measure the shading angles for each sample row. It should be rotated once in clockwise and once in counter-clockwise to measure angles for the left and right side of the sample rows.
7. In order to measure shadow angle along its Y-axis, we put the structure on its -Y side and coordinate its position to the center of the plate. By doing steps 2-6 again, we will have shadow angles in Y-axis.
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