1引言 ............................................................................................................................................... 3 1.1编写目的 ................................................................................................................................. 3 1.2背景......................................................................................................................................... 3 1.3定义......................................................................................................................................... 3 1.4参考资料 ................................................................................................................................. 3 2任务概述 ....................................................................................................................................... 4 2.1目标......................................................................................................................................... 4 2.2用户的特点 ........................................................................................... 错误！未定义书签。 2.3假定和约束 ............................................................................................................................. 4 3需求规定 ..................................................................................................... 错误！未定义书签。 3.1对功能的规定 ......................................................................................................................... 4 3.2对性能的规定 ....................................................................................... 错误！未定义书签。 3.2.1精度 ................................................................................................................................ 11 3.2.2时间特性要求 ................................................................................................................ 11 3.2.3灵活性 ............................................................................................................................ 11 3.3输人输出要求 ....................................................................................... 错误！未定义书签。 3.4数据管理能力要求 ............................................................................... 错误！未定义书签。 3.5故障处理要求 ....................................................................................... 错误！未定义书签。 3.6其他专门要求 ....................................................................................... 错误！未定义书签。 4运行环境规定 ............................................................................................................................... 9 4.1设备....................................................................................................................................... 12 4.2支持软件 ............................................................................................................................... 12 4.3接口....................................................................................................... 错误！未定义书签。 4.4控制....................................................................................................... 错误！未定义书签。