利用相应的高层次模型，详细分析并仿真了电流源匹配误差和电流源输出阻抗对DAC的非线性误差nl、信号噪声失调比SNDR、无杂波动态范围SFDR的影响。
With corresponding models how the matching errors and output resistance of current source affect the NL, SNDR and SFDR of DAC is analyzed and simulated in detail.
仿真结果表明，模糊控制方法不依赖精确模型、实现起来非常简单，能有效地控制MR智能阻尼器，减小高层建筑各层的位移及速度。
The simulation result shows that fuzzy control doesn't depend on accurate model and its operation is easy, it can control MR damper effectively, decrease displacement and velocity.
文中给出了高层概念的操作知识表示模型，提出了基于约束对象状态映射和操作规程约束满足的条件下设备操作仿真技术。
Based on the application characteristics, the definition, conception, set, and the restraints of the objects on UCard are presented, and the object restriction chart is given.
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