论文标题
压电富丽体放大器的闭环控制
Closed-Loop Control of a Piezo-Fluidic Amplifier
论文作者
论文摘要
基于Coandă效应的流体阀越来越多地被考虑用于空气流动控制应用中。一个限制因素是它们在切换时间的变化，这通常排除了它们的使用。本文的目的是证明对最近开发的新型压电易流动阀的闭环控制，该阀以牺牲操作带宽为代价来减少响应时间不确定性。用途是，流体喷气机通过偏离其稳态位置来响应压电音调。用于改变此挠度的控制信号是在压电音调上振幅调制的。仅使用来自一个设备输出通道的压力测量，设计基于输出的LQG调节器遵循所需的参考偏转，可控制90 m/s射流的控制。最后，证明了控制器在干扰排斥和响应时间可预测性方面的性能。
Fluidic valves based on the Coandă effect are increasingly being considered for use in aerodynamic flow control applications. A limiting factor is their variation in switching time, which often precludes their use. The purpose of this paper is to demonstrate the closed-loop control of a recently developed, novel piezo-fluidic valve that reduces response time uncertainty at the expense of operating bandwidth. Use is made of the fact that a fluidic jet responds to a piezo tone by deflecting away from its steady state position. A control signal used to vary this deflection is amplitude modulated onto the piezo tone. Using only a pressure measurement from one of the device output channels, an output-based LQG regulator was designed to follow a desired reference deflection, achieving control of a 90 m/s jet. Finally, the controller's performance in terms of disturbance rejection and response time predictability is demonstrated.
