One state-unmeasured missile control system design

The pitch channel output tracking of a kind of supersonic cruise missile over load control system was designed based on second order sliding mode control theory. Output-redefinition approach was adopted to resolve the non-minimum phase problem between rudder angle and overload output of STT missile system, second order sliding mode control was used to eliminate chatter, and guaranteed the tracing of original system output. The observer was designed to deal with the not complete state measurable system. The stability and robustness were verified by the simulations results.