# The Rockwell Collins Satellite Transportable Terminal

1789 WordsOct 3, 20168 Pages
The Rockwell Collins Satellite Transportable Terminal (STT) is an important satellite for the signal branch that is used to make communications virtually anywhere. A suspension system needs to be put into the STT so that it will not be damaged while being loaded and transported. There are three shock systems available with different spring constants and damping coefficients. The three shock systems are called Air Coasters, Cloud Riders, and Extreme Shocks. A HMMWV was being tested when it began bouncing up and down, so the soldiers operating the vehicle shut it down for fear of it breaking down. Some engineers re-fired the gun so they could take measurements of its displacement from the ground in order to understand what was happening, but they only took measurements for 60 seconds before they shut it down. Free Dampened System – Loading the Trailer The suspension system can be modeled using the following equation: m (d^2 x)/(dt^2 )+β dx/dt+kx=f(t) x(t) is the displacement from its rest position in meters, m is the mass of the object in kilograms, β is the damping constant in kg/second, k is the spring constant in kg/sec2, and f(t) is the external force in Newtons (N). The mass of the satellite is 1800 kg and the satellite is at equilibrium when the trailer is loaded. Before the trailer is loaded, the displacement of the shocks is 0.05 meters, so the starting displacement is 0.05. The critically-damped value of each shock is calculated in Appendix A. The Air Coasters