Zero Miss Distance Guidance Using Feedforward and Periodic Control

2012 ◽  
Author(s):  
Dwaipayan Mukherjee ◽  
Debasish Ghose
Keyword(s):  
Periodic Control ◽  
Miss Distance

Design and implementation of decoupled periodic control scheme for a laboratory-based quadruple-tank process

2021 ◽  
pp. 095965182110228
Author(s):  
Jatin K Pradhan ◽  
Arun Ghosh
Keyword(s):  
Real Time ◽  
High Frequency ◽  
Linear Time ◽  
Disturbance Attenuation ◽  
Minimum Phase ◽  
Periodic Control ◽  
Linear Time Invariant ◽  
Control Scheme ◽  
Gain Margin ◽  
Time Invariant

It is well known that linear time-invariant controllers fail to provide desired robustness margins (e.g. gain margin, phase margin) for plants with non-minimum phase zeros. Attempts have been made in literature to alleviate this problem using high-frequency periodic controllers. But because of high frequency in nature, real-time implementation of these controllers is very challenging. In fact, no practical applications of such controllers for multivariable plants have been reported in literature till date. This article considers a laboratory-based, two-input–two-output, quadruple-tank process with a non-minimum phase zero for real-time implementation of the above periodic controller. To design the controller, first, a minimal pre-compensator is used to decouple the plant in open loop. Then the resulting single-input–single-output units are compensated using periodic controllers. It is shown through simulations and real-time experiments that owing to arbitrary loop-zero placement capability of periodic controllers, the above decoupled periodic control scheme provides much improved robustness against multi-channel output gain variations as compared to its linear time-invariant counterpart. It is also shown that in spite of this improved robustness, the nominal performances such as tracking and disturbance attenuation remain almost the same. A comparison with [Formula: see text]-linear time-invariant controllers is also carried out to show superiority of the proposed scheme.

scholarly journals Optimization method of acoustic measurement station placement for wide-area miss distance

2020 ◽  
Vol 1592 ◽  
pp. 012017
Author(s):  
Yulong Wang ◽  
Xiaoxi Lu ◽  
Yanhong Liu ◽  
Liang Zhang ◽  
Chuangfei Wei
Keyword(s):  
Optimization Method ◽  
Wide Area ◽  
Acoustic Measurement ◽  
Miss Distance

Indirect adaptive periodic control

1999 ◽  
Vol 44 (12) ◽  
pp. 2308-2312 ◽  
Author(s):  
D. Dimogianopoulos ◽  
R. Lozano ◽  
A. Ailon
Keyword(s):  
Periodic Control
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