对小推力高压燃烧室动力系统各部件建立了数学模型，并对此系统进行了数值计算，分析了燃烧时滞对此系统的影响。计算结果表明，在燃烧时滞较大时，高室压动力系统响应较慢，发动机性能参数的超调量较大，达到稳态所需的时间较长，轨控发动机与姿控发动机共用同一个供应系统，姿控发动机受燃烧时滞的影响更大。所得结论为提高小推力高室压动力系统的响应能力提供了依据 A mathematical model is established for each component of the small thrust high pressure combustion chamber power system, and the numerical calculation of this system is carried out. The influence of combustion delay on this system is analyzed. The results show that when the combustion delay is large, the response of the high pressure chamber is slow, the overshoot of the engine performance parameter is large, and the time required to reach the steady state is longer, and the trajectory control engine and the attitude control engine share the same A supply system, the attitude control engine is more affected by the combustion lag. The conclusions obtained provide a basis for improving the response ability of low-thrust high-pressure system