射入段仿真数模与散布分析

SIMULATION MATHEMATICAL MODEL OF EJECTION TRAJECTORY AND SPREAD ANALYSIS

Numerical simulation is a tool used in the design of a new missile system and in the modification or evaluation of existing systems. Missile simulation allows the engineer to actually try out his design without the expense of building and flying an actual missile. Through simulation with a substantial savings in time and expense a great deal can be learned. A central part of missile simulation is the missile dynamics equations which govern how the missile will react to given forces or moments. These simulations are usually put together with emphasis on a particular aspect of the design such as guidance, controlability, component evaluation etc. These equations can be implemented in a variety of ways and are often the source of confusion due to the differences and simplifications made. This paper deals with this issue by developing several common forms of missile dynamics equations that takes account of influence of various disturbances such as eccentricities of resultant thrust and mass centre, the horizontal constant wind... etc. The equations presented in the paper are suitable for studying ejection trajectory of other vehicle. In the paper spread problem due to above factors is discussed also.