%0 Journal Article %A N. Popovich and P. Yan %D 2011 %J International Journal of Aerospace and Mechanical Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 50, 2011 %T Determination of Q and R Matrices for Optimal Pitch Aircraft Control %U https://publications.waset.org/pdf/9945 %V 50 %X In this paper, the process of obtaining Q and R matrices for optimal pitch aircraft control system has been described. Since the innovation of optimal control method, the determination of Q and R matrices for such system has not been fully specified. The value of Q and R for optimal pitch aircraft control application, have been simulated and calculated. The suitable results for Q and R have been observed through the performance index (PI). If the PI is small “enough", we would say the Q & R values are suitable for that certain type of optimal control system. Moreover, for the same value of PI, we could have different Q and R sets. Due to the rule-free determination of Q and R matrices, a specific method is brought to find out the rough value of Q and R referring to rather small value of PI. %P 445 - 451