Application of the fuzzy identification with PID grade algorithm in the missile pose control

In recent years, fuzzy identification based on system identification theory has become a hot academic topic. Interval type-2 fuzzy logic systems (IT2 FLSs) have become a rising technology. This paper designs a type of Nagar-Bardini (NB) structure-based singleton IT2 FLSs for fuzzy identification problems. The antecedents of primary membership functions of IT2 FLSs are chosen as Gaussian type-2 primary membership functions with uncertain standard deviations. Then, the back propagation algorithms are used to tune the parameters of IT2 FLSs according to the chain rule of derivation. Compared with the type-1 fuzzy logic systems, simulation studies show that the proposed IT2 FLSs can obtain better abilities of generalization for fuzzy identification problems.

Download Full-text

Immersion and Invariance Adaptive Pose Control for Spacecraft Proximity Operations Under Kinematic and Dynamic Constraints

IEEE Transactions on Aerospace and Electronic Systems ◽

10.1109/taes.2021.3053134 ◽

2021 ◽

pp. 1-1

Author(s):

Xiaodong Shao ◽

Qinglei Hu

Keyword(s):

Proximity Operations ◽

Dynamic Constraints ◽

Immersion And Invariance ◽

Pose Control

Download Full-text

Fuzzy Identification Using Fuzzy Neural Networks With Stable Learning Algorithms

IEEE Transactions on Fuzzy Systems ◽

10.1109/tfuzz.2004.825067 ◽

2004 ◽

Vol 12 (3) ◽

pp. 411-420 ◽

Cited By ~ 193

Author(s):

W. Yu ◽

X. Li

Keyword(s):

Neural Networks ◽

Learning Algorithms ◽

Fuzzy Neural Networks ◽

Fuzzy Identification ◽

Fuzzy Neural ◽

Stable Learning

Download Full-text

Characterization of Postharvest Fungicide-Resistant Botrytis cinerea Isolates From Commercially Stored Apple Fruit

Phytopathology ◽

10.1094/phyto-07-16-0250-r ◽

2017 ◽

Vol 107 (3) ◽

pp. 362-368 ◽

Cited By ~ 16

Author(s):

Wayne M. Jurick ◽

Otilia Macarisin ◽

Verneta L. Gaskins ◽

Eunhee Park ◽

Jiujiang Yu ◽

...

Keyword(s):

Botrytis Cinerea ◽

Gray Mold ◽

Apple Fruit ◽

Sublethal Dose ◽

Long Term Storage ◽

Pose Control ◽

First Time

Botrytis cinerea causes gray mold and is an economically important postharvest pathogen of fruit, vegetables, and ornamentals. Fludioxonil-sensitive B. cinerea isolates were collected in 2011 and 2013 from commercial storage in Pennsylvania. Eight isolates had values for effective concentrations for inhibiting 50% of mycelial growth of 0.0004 to 0.0038 μg/ml for fludioxonil and were dual resistant to pyrimethanil and thiabendazole. Resistance was generated in vitro, following exposure to a sublethal dose of fludioxonil, in seven of eight dual-resistant B. cinerea isolates. Three vigorously growing B. cinerea isolates with multiresistance to postharvest fungicides were further characterized and found to be osmosensitive and retained resistance in the absence of selection pressure. A representative multiresistant B. cinerea strain caused decay on apple fruit treated with postharvest fungicides, which confirmed the in vitro results. The R632I mutation in the Mrr1 gene, associated with fludioxonil resistance in B. cinerea, was not detected in multipostharvest fungicide-resistant B. cinerea isolates, suggesting that the fungus may be using additional mechanisms to mediate resistance. Results from this study show for the first time that B. cinerea with dual resistance to pyrimethanil and thiabendazole can also rapidly develop resistance to fludioxonil, which may pose control challenges in the packinghouse environment and during long-term storage.

Download Full-text

A Novel Vertical Lift Machine and its Precise Pose Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.3105 ◽

2014 ◽

Vol 989-994 ◽

pp. 3105-3109

Author(s):

Xiao Bo Liu ◽

Xiao Feng Wei ◽

Xiao Dong Yuan ◽

Wei Ni

Keyword(s):

Control System ◽

Theoretical Analysis ◽

Control Method ◽

High Accuracy ◽

Inverse Kinematic ◽

Design Model ◽

Pose Control ◽

Vertical Lift ◽

Position And Orientation ◽

Control Principle

This paper deals with the design and theoretical analysis on a novel vertical lift machine which can vertically lift above 700 kg load up to 3.2 meters above the floor and located the load with high accuracy of position and orientation. Firstly the design model based on the installment demands of line-replaceable units (LRUs) is constructed. Then theoretical analysis including the number of degree of freedom of the lift machine, the inverse kinematic, the control principle, the lift platform pose error and the precise pose control method are conducted in the article. The validity of the design model and the effectiveness of the precise pose control system are confirmed by experiments using a prototype lift machine.

Download Full-text