Development of Autonomous Recovery System for Pipeline of Naval Ships by Using a Multi-Stage Control Algorithm

2021 ◽  
pp. 1-1
Author(s):  
Byung Chang Jung ◽  
Seok-jun Moon ◽  
Sang Hyuk Lee ◽  
Hyuk Lee ◽  
Jin-woo Park ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Multi Stage ◽  
Recovery System ◽  
Autonomous Recovery

scholarly journals Marine UAV–USV Marsupial Platform: System and Recovery Technic Verification

2020 ◽  
Vol 10 (5) ◽  
pp. 1583 ◽  
Author(s):  
Hongda Zhang ◽  
Yuqing He ◽  
Decai Li ◽  
Feng Gu ◽  
Qi Li ◽  
...  
Keyword(s):  
Physical Simulation ◽  
Current System ◽  
Accurate Estimation ◽  
Unmanned Systems ◽  
Mobile Platforms ◽  
Practical Applications ◽  
Heterogeneous Platform ◽  
Short Period ◽  
Recovery System ◽  
Autonomous Recovery

Heterogeneous unmanned systems consisting of unmanned aerial vehicles (UAVs) and unmanned surface vehicles (USVs) have great application potential in marine environments. At present, the fully autonomous recovery of UAVs is a key problem that restricts any significant application of a heterogeneous unmanned system. This paper presents a novel fully autonomous recovery system, covering the entire process of recovery of small fixed-wing UAVs on mobile platforms at sea. We describe methods or solutions for the key problems encountered by the current system, including active modeling of the UAV–USV heterogeneous platform motion model, accurate estimation of the highly dynamic relative motion of the heterogeneous platform, dynamic analysis of the arresting cable system, and compliance control of the manipulator recovery system. Based on these methods, a physical simulation platform for the fully autonomous recovery system, including an actively adjustable arresting cable, manipulator compliance recovery system, and other subsystems, is developed and verified through experiments. The experiments show that the system proposed in this study can achieve full autonomous recovery of a small ship-based fixed-wing UAV with a high success rate in a short period. This system is the foundation for practical applications of UAV–USV heterogeneous unmanned systems in the marine environment.

Methoden zur produktfunktionsgeregelten Fertigung von Composite-Bauteilen/Methods for product function controlled manufacturing of composite components – Hybrid component manufacturing with chained forward control loop

2019 ◽  
Vol 109 (10) ◽  
pp. 785-792
Author(s):  
C. Hopmann ◽  
S. Stender ◽  
N. Magura ◽  
M. Emonts ◽  
K. Fischer ◽  
...  
Keyword(s):  
Production System ◽  
Control Algorithm ◽  
Cost Effective ◽  
Measurement Technology ◽  
Control Loop ◽  
Multi Stage ◽  
System P ◽  
Product Function ◽  
Stage Process ◽  
Component Manufacturing

Im Projekt „iComposite4.0“ wurde ein Produktionssystem zur Fertigung hybrider FVK-Bauteile entwickelt. Durch den Multimaterialansatz werden kostengünstige Materialien lastspezifisch eingesetzt. Zudem wird der mehrstufige Prozess genutzt, um während der Produktion durch eine Ausgleichsfunktion eine Anpassung der mechanischen Bauteileigenschaften umzusetzen. Kernaspekte hierbei liegen in der Integration von Messtechnik, Modellierungen und Entscheidungsalgorithmen in das Produktionssystem.   In the iComposite4.0 project, a production system for the manufacture of hybrid FRP components was developed. The multi-material approach allows cost-effective materials to be used for load specific designs. Moreover, the multi-stage process is used to establish an control-algorithm to compensate fluctuations of the mechanical properties of the final part during production. Core aspects are the integration of measurement technology, modelling and decision algorithms into the production system.

Study on Marine Diesel Engine Waste Heat Recovery System with Multi-Stage Flash

2013 ◽  
Vol 709 ◽  
pp. 297-300
Author(s):  
Zhi Yu Wang ◽  
Song Zhou ◽  
Bang Long Zhang ◽  
Cai Ling Li ◽  
He Fu Zhang
Keyword(s):  
Diesel Engine ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Marine Diesel Engine ◽  
Waste Heat Recovery System ◽  
Multi Stage ◽  
Recovery System ◽  
Heat Recovery System ◽  
Marine Diesel

As international oil price rise rapidly, the proportion of the fuel cost share of the transport cost has become increasingly high. At the same time, in order to reduce CO2 emission, the meeting of MPEC formulated and adopted the resolution on EEDI, so saving energy and reducing emission has become a marine industry benchmark. In this paper, through the study on marine diesel engine waste heat recovery system with multi-stage flash, establishing the universal model of multi-stage flash unit, and optimizing the parameters of the low-temperature waste heat recovery system with multi-stage flash. This paper constructs the power equation in matrix model, and each matrix of the model has a simple rule to be filled in, which make it versatile, and suitable for computerization, through estimating the power generation and CO2 emission reduction of the system on main diesel engine different loads, analyzing the waste heat recovery system with economic method finally.

Improved pilot training via bifurcation analysis and robust control for aircraft loss of control problems

2019 ◽  
Vol 233 (14) ◽  
pp. 5414-5427
Author(s):  
G Rohith ◽  
Nandan K Sinha
Keyword(s):  
Robust Control ◽  
Pilot Training ◽  
Training Procedure ◽  
Structural Constraints ◽  
Loss Of Control ◽  
Recovery System ◽  
Recovery Strategies ◽  
Autonomous Recovery ◽  
Training Methodologies

Aircraft loss of control is one of the largest contributors to fatal accidents in the aviation environment. The unprecedented change in aircraft dynamics due to loss of control onset and the associated structural constraints make loss of control prevention and/or recovery a challenging task. State-of-the-art autopilots are generally designed for nominal aircraft operations and disengage under off-nominal conditions, hence cannot be viewed as a safety solution during loss of control onsets. Herein lies the importance of providing training to pilots so as to equip themselves to rescue aircraft from loss of control events. Current pilot training methodologies have significant limitations when it comes to loss of control prevention and recovery strategies. In this context, a simulator for improved pilot training based on bifurcation and continuation techniques is presented in the paper. Augmenting these techniques with the current pilot training procedure can significantly improve the quality of training. This methodology can help pilots to distinguish various loss of control scenarios and aid them in taking appropriate recovery decisions intuitively. Meanwhile, a robust control-based loss of control handling module is also presented for developing non-intuitive strategies for loss of control prevention and recovery. This module can simulate adequate control profiles that the pilot can follow to get in and out of various loss of control scenarios. Moreover, it can be used as pilot activated recovery system in case of pilot disorientation and as a fully autonomous recovery system for much complex scenarios. The simulator is developed in MATLAB/SIMULINK platform and is shown to realize diverse loss of control events like spiral, spin, etc., and subsequent recovery from the same.

Intelligent Control of Valve-Controlled Electro-Hydraulic System in Erecting Device Based on Mechanical Mechanics

2013 ◽  
Vol 644 ◽  
pp. 72-76
Author(s):  
Biao Deng ◽  
Wen Bin Su ◽  
Bo Shi Song ◽  
Qin Yang Guo ◽  
Chong Rui Liu
Keyword(s):  
Intelligent Control ◽  
Pid Control ◽  
Hydraulic System ◽  
Control Algorithm ◽  
System Model ◽  
Fuzzy Pid Control ◽  
Grade Change ◽  
Hydraulic Impact ◽  
Multi Stage ◽  
Impact Problems

According to the fast and stable requirements of erecting device, the characteristic of dynamics was analyzed and several common law of motion curve was discussed. The erecting curve was optimized and different stress and impact problems of Multi-stage Cylinder were studied to establish the system model. Fuzzy PID control algorithm was used to co-simulate in erecting process to optimize the control parameters, which can weaken impact when the working parts was in place in erecting process. The experiment shows that the erecting time is about 50s and collision is decreased when the Multi-stage Cylinder is stickled out in grade change to reduce hydraulic impact. So it may be have an important guidance and application value in engineering.

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