针对增程修正弹如何实现同时弹着火控问题，增程修正弹射程是影响其实现同时弹着的关键因素。为了分析增程修正弹的时间控制参数对其射程的影响，通过建立复合增程质点弹道模型，采取数字仿真计算的方式，分析了火箭点火时间、阻力环开环时间等时间控制参数分别对射程的影响，并分别建立了影响关系拟合函数，对增程修正弹药实现同时弹着提供了定量描述手段，具有重要应用参考价值。

The firing range of extended range and trajectory correction projectile is the key factor for the projectile to achieve simultaneous impact. In order to study the influence of time control parameter to the firing rangewe established a compound extended range particle trajectory modeland analyzed the influence of the time control parameterssuch as rocket firing time and drag ring openloop timeto the firing range by using digital simulation method. Further morethe fitting functions were established for the influences.A quantitative description method was presented for extended range and trajectory correction projectile to achieve simultaneous impactwhich has important application and reference value.