![](https://www.bell-everman.com/images/2024-347_web.png)
Raising the Bar for Artemis Program’s PPE Solar Array Simulation Frame — Part II
In our previous blog post we discussed the mechanical challenges in designing the solar simulator motion system to test NASA’s Power and Propulsion Element (PPE) solar arrays. We designed, engineered and fabricated a custom mobile-robot gantry to reduce system cost and complexity. In addition to addressing stability and lifting challenges as discussed previously, we also addressed construction, mobility and electrical challenges.