Reliability assignment of the fight control system based on nonlinear programming

Firstly, definition and methods of reliability assignment are introduced in this paper. And the nonlinear programming based on Lagrange multipliers method is described briefly. Meanwhile the calculation principle and mathematic model are proposed. Secondly, determining the reliability index is discussed in the paper, and the reliability block diagram and allocation model are given. Base on the discussion before and the fight control with longitudinal pitch motion, the feasibility of the nonlinear programming method is needed to verify. Lastly, the allocated system reliability is bigger than the predicted threshold reliability parameter, which verifies that the used allocation method is feasible and reasonable.