1引言...............................................................................................................................................21.1编写目的................................................................................................................................21.2背景........................................................................................................................................21.3定义........................................................................................................................................21.4参考资料................................................................................................................................22任务概述.......................................................................................................................................22.1目标........................................................................................................................................22.2用户的特点.............................................................................................................................32.3假定和约束.............................................................................................................................33需求规定.......................................................................................................................................33.1对功能的规定.........................................................................................................................33.2对性能的规定.........................................................................................................................33.2.1精度.................................................................................................................................33.2.2时间特性要求..................................................................................................................33.2.3灵活性..............................................................................................................................43.3输人输出要求.........................................................................................................................43.4数据管理能力要求.................................................................................................................43.5故障处理要求.........................................................................................................................43.6其他专门要求.........................................................................................................................54运行环境规定................................................................................................................................54.1设备........................................................................................................................................54.2支持软件................................................................................................................................54.3接口........................................................................................................................................54.4控制....................................................................................................
