57 verified the applicability of their model for metals and composites. The predictions agreed to a large extent with the experimental results in both cases as regards the force and torque at the cutting lips. The correlation was unsatisfactory when the effect of chisel edge in composite drilling...
Variable-thrust LRE technology is one of the key technologies needed to realize reusable launch rockets. For landing a rocket, the first stage the rocket needs to start the LRE again during the landing phase, and a much lower thrust backward toward the center of the earth is acting on the ...
The controller thus tuned was also required to estimate a feed-forward input for a particular reference thrust. To calculate this, a curve fit obtained from the experimental data was utilized. In the experiments, the feedback signal used was the chamber pressure. Therefore, the reference thrust ...