本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。生命支持系统（LSS）通常被定义为在执行规定任务所需的状态下提供维持人类生命和健康所需要素的系统。根据具体设计要求，LSS将提供压力、温度以及当地大气、食物和水的成分。 它可以收集、处理或再处理废物，如二氧化碳、水蒸气、尿液和粪便，也可以不收集、处理或再处理。从前面的定义可以看出，LSS要求可能会有很大差异，这取决于指定的任务，例如在地球轨道或月球任务中的操作。在所有情况下，运行时间都是一个重要的设计因素。Lss有时被简要定义为提供大气控制和水、废物和热管理的系统。完成上述一般功能所需的主要子系统包括: 1.呼吸和增压储气系统，2。温湿度控制系统。二氧化碳控制系统，4。微量污染物控制系统，5。水管理系统。废物管理系统。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.A life support system (LSS) is usually defined as a system that provides elements necessary for maintaining human life and health in the state required for performing a prescribed mission. The LSS, depending upon specific design requirements, will provide pressure, temperature, and composition of local atmosphere, food and water. It may or may not collect, dispose, or reprocess wastes such as carbon dioxide, water vapor, urine, and feces.It can be seen from the preceding definition that LSS requirements may differ widely, depending on the mission specified, such as operation in Earth orbit or lunar mission. In all cases the time of operation is an important design factor. An Lss is sometimes briefly defined as a system providing atmospheric control and water, waste, and thermal management.The major subsystems required to accomplish the general functions mentioned above are: 1. breathing and pressurization gas storage system, 2. temperature and humidity control system, 3. carbon dioxide control system, 4. trace contaminant control system, 5. water management system, and 6. waste management system.