针对连续系统直接设计数字控制器的采样控制理论引起了广泛的重视．目前采样控制理论不易处理系统的参数不确定性和状态的时域约束，基于实用稳定性理论给出了采样系统实用稳定的条件，在此基础上分析了线性参数不确定系统的采样控制问题，结果表示为线性矩阵不等式．提出的方法弥补了传统采样控制方法在处理系统的不确定性和时域性能约束上的不足，因此结果具有较大的理论与应用价值 Sampling control theory for direct design of digital controllers for continuous systems has attracted a great deal of attention. At present, the sampling control theory is not easy to deal with the parameter uncertainty and the time-domain constraints of the system. Based on the practical stability theory, the practical stability of the sampling system is given. On this basis, the sampling control of the uncertain linear system is analyzed. The result is expressed as a linear matrix inequality. The proposed method makes up for the lack of the traditional sampling control method in dealing with the system uncertainty and time-domain performance constraints, so the results have a greater theoretical and application value