Tactical Missile Technology

Aimed at the flight stability problem of an anti-tank missile at high altitudes,the performance of the control system is researched adopting a method combing simulation on the incidence angle curve and the frequency domain analysis. The model of the control system is established according to its composing,and the associate problems as integral method,simulation interval,simulation scale,and initial value are analyzed,to simulate the variation law of the incidence angle and gravity height center in flight.The result indicates that incidence angle tends to divergence,and the control system shows instability at high altitudes. The decreasing of air density leads to instability by investigating the control system parameters,which offers some improvement principles of the control system for high altitudes adaptation.