Abstract: The parameter sensitivity of the tripropellant rocket engine for SSTO vehicle was discussed.The parameter sensitivity of vehicle struct mass was also discussed.Based on trajectory optimization,the parameters were divided into four classes,which direct to the future research

Key words: Single stage to orbit;Tripropellant;Sensibility;Performance analysis

摘要： 对三组元发动机性能参数以及重要结构参数对性能的影响进行了分析，确定了４类影响等级。

关键词: 单级入轨;三元推进剂;灵敏度;性能分析