It requires interesting control systems to keep stable and performing optimally. You can read about some of the challenges here (has some great figures) ... ht

It requires interesting control systems to keep stable and performing optimally. You can read about some of the challenges here (has some great figures) ... http://www.sciencedirect.com/science/article/pii/S0167610515000690 http://www.sciencedirect.com/science/article/pii/S0167610515...