Closed loop pneumatic position control using discrete time model regulation
Closed loop pneumatic position control using discrete time model regulation
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DOI：
10.1109/acc.1999.786370
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
L. Guvenç
中科院分区：
文献类型：
--
作者：
L. Guvenç
阀门的非线性特性和空气的可压缩性使气动位置控制成为一项相当困难的任务。一种称为离散时间模型调节（DMR）的模型调节方案最初是为了降低具有大量植物模型不确定性的系统的灵敏度而提出的，本文将其应用于气动系统，使其输入输出关系遵循其标称模型，从而大大简化了剩余的反馈位置控制器设计。首先，介绍了DMR方法，并对其局限性进行了分析。仿真结果证明了该方法在处理气动系统参数较大变化时的有效性。最后表明，通过使用DMR，无需使用压力传感器，可以获得与使用差压反馈相比的植物动力学改进。
Nonlinear valve characteristics and the compressibility of air make pneumatic position control a quite difficult task. A model regulation scheme called discrete time model regulation (DMR) and originally proposed for sensitivity reduction in systems with significant amounts of plant model uncertainty is applied to a pneumatic system here to make its input-output relationship follow that of its nominal model, simplifying the remaining feedback position controller design significantly. First, the DMR method is introduced and its limitations are evaluated analytically. Its effectiveness in dealing with large changes in pneumatic system parameters is demonstrated using simulation results. It is finally shown that plant dynamics improvements comparable to those achieved using differential pressure feedback can be obtained by using DMR with the benefits of not having to use a pressure sensor.