Aberration-Free Metasurface Platform Enabled by Dynamic Phase Compensation

2022 ◽  
Author(s):  
Chunsheng Guan ◽  
RUI FENG ◽  
Badreddine Ratni ◽  
XUMIN DING ◽  
Jianjia Yi ◽  
...  
Keyword(s):  
Phase Compensation ◽  
Dynamic Phase

scholarly journals Phase Compensation Strategies for Modulated-Demodulated Control With Application to Pulsed Jet Injection

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Cory Hendrickson ◽  
Robert T. M’Closkey
Keyword(s):  
Disturbance Rejection ◽  
Jet Injection ◽  
Phase Compensation ◽  
Reference Tracking ◽  
Pulsed Jet ◽  
Control Frequency ◽  
Dynamic Phase ◽  
Compensation Methods ◽  
Aerospace Systems ◽  
Periodic Signals

Modulated-demodulated control is an effective method for asymptotic disturbance rejection and reference tracking of periodic signals, however, conventional static phase compensation often limits the loop gain in order to avoid sensitivity function peaking in a neighborhood of the frequencies targeted for rejection or tracking. This paper introduces dynamic phase compensation for modulated-demodulated control which improves disturbance rejection characteristics by inverting the plant phase in a neighborhood of the control frequency. Dynamic phase compensation is implemented at baseband which enables the use of low-bandwidth compensators to invert high frequency dynamics. Both static and dynamic phase compensation methods are used to demonstrate a novel application of repetitive control for pulsed jet injection. In this application pulsing an injectant has been shown to produce advantageous effects such as increased mixing in many energy generation and aerospace systems. The sharpness of the pulse can have a large impact on the effectiveness of control. Modulated-demodulated control is used to maximize the sharpness of a pulsed jet of air using active forcing by tracking a square wave in the jet’s temporal velocity profile.

Leadership and member voice in action teams: Test of a dynamic phase model.

2018 ◽  
Vol 103 (1) ◽  
pp. 97-110 ◽  
Author(s):  
Crystal I. C. Farh ◽  
Gilad Chen
Keyword(s):  
Phase Model ◽  
Dynamic Phase

scholarly journals Stable Radio Frequency Transmission of Single Optical Source Over Fiber Based on Passive Phase Compensation

2021 ◽  
Vol 13 (1) ◽  
pp. 1-7
Author(s):  
Chen Hu ◽  
Bin Luo ◽  
Wenlin Bai ◽  
Wei Pan ◽  
Lianshan Yan ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Phase Compensation ◽  
Optical Source ◽  
Passive Phase
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