球(扁)形药是狙击枪弹的重要动力能源，其弧厚一致性直接关系到枪弹的弹道性能。目前球(扁)形药的挤压成型工艺主要应用于橡胶行业的开炼机，虽能实现功能性挤压，但存在挤压精度低、成型一致性差等问题。针对上述问题，开发了一套基于粒子群优化 终端滑模（PSO-TSM）的挤压机辊距智能调节系统，该系统采用粒子群优化（PSO）算法对终端滑模（TSM）控制器中多参数进行迭代优化，达到精确调节辊距、提高弧厚一致性的目的。通过挤压试验验证，与开炼机相比，球(扁)形药药粒弧厚误差控制在±0.02 mm，挤压合格率达到95%以上。 

The oblate spherical powder is an important power source of sniper ammunition, the consistency ofthickness is directly related to the ballistic performance of the projectile. At present, the extrusion molding process of the oblate spherical powder is all applied in rubber industry. Although the functional extrusion can be achieved, there are some problems such as low extrusion accuracy and poor molding consistency. Aiming at the above problems, a set of extruding machine roll distance accurate adjustment system based on particle swarm optimization terminal sliding mode （PSO-TSM） is developed. In this system, particle swarm optimization (PSO) algorithm is used to optimize multiple parameters in terminal sliding mode (TSM) controller iteratively, so as to achieve accurate adjustment of roll distance and improve the consistency of arc thickness. It is verified by extrusion test that the thickness error of the oblate spherical powder is controlled within ±0.02 mm, and the pass rate of extrusion reaches more than 95%.