1引言...............................................................................................................................................21.1编写目的................................................................................................................................21.2背景........................................................................................................................................21.3定义........................................................................................................................................21.4参考资料................................................................................................................................32任务概述.......................................................................................................................................32.1目标........................................................................................................................................32.2用户的特点.............................................................................................................................32.3假定和约束.............................................................................................................................43需求规定.......................................................................................................................................43.1对功能的规定.........................................................................................................................43.2对性能的规定.......................................................................................................................193.2.1精度................................................................................................................................193.2.2时间特性要求................................................................................................................193.2.3灵活性............................................................................................................................193.3输人输出要求.......................................................................................................................193.4数据管理能力要求...............................................................................................................203.5故障处理要求.......................................................................................................................203.6其他专门要求.......................................................................................................................204运行环境规定..............................................................................................................................224.1设备......................................................................................................................................224.2支持软件...............................................................................................................................224.3接口......................................................................................................................................224.4控制..............................................................................................................
