An Example UAV Assembly
An example student UAV is illustrated in Figure 17.9. The structural philosophy adopted is one of a composite tube/plate load- carrying skeleton with hollow-foam single-curvature bodies
Figure 17.9 Illustrative student UAV assembly.
Figure 17.10 UAV assembly model can be modified by changing design table parameters.
for flying surfaces and fuselage. The foam can be covered in a variety of reinforcing materials including Mylar (of various thicknesses), glass, and carbon-fiber cloths. Finally, for nose cones and double-curvature surfaces, vacuum forming is a quick, cheap, and low-cost process and this is used for the nose cone in the example.
The Solidworks assembly shown is parametric and can be modified to respond to externally driven parameters as demonstrated in the somewhat exaggerated examples in Figure 17.10. All of the significant masses are included in order to help accurately predict overall mass properties such as maximum take-off weight (MTOW) and CoG location.
It is very helpful if the guidelines on systems engineering given in Section 8.4 have been followed when starting to generate explicit geometry. This is particularly important if many people are producing geometry models. Essentially, the construction of geometry by a team demands clarity over who is doing what and very precise interface definitions and ownership thereof.
In order to manage what becomes quite a complex geometry model, the following procedure is recommended: