scholarly journals Reliability Research on Hydraulic System of Civil Aircraft

2016 ◽  
Author(s):  
Jiangtao Chen ◽  
Rui Liu
Keyword(s):  
Hydraulic System ◽  
Civil Aircraft

Design and co-simulation of a nose wheel steering system for a civil aircraft

2021 ◽  
pp. 095441002110317
Author(s):  
Dawei Li ◽  
Mingxing Lin ◽  
Tao Zhang
Keyword(s):  
Hydraulic System ◽  
Steering System ◽  
Air Transport ◽  
Design Parameters ◽  
Control Law ◽  
System A ◽  
Steering Mechanism ◽  
Civil Aircraft ◽  
Design Requirements ◽  
The Mathematical Model

In order to automate the ground maneuvering of a civil regional aircraft and improve the efficiency of the air transport system, a fly-by-wire nose wheel steering system (NWSS) was designed. A rack and pinion steering mechanism integrated with a single actuator mechanism was proposed. The basic control circuit diagram with integrated test, the electro-hydraulic system diagram, and the mathematical model of the steering system were established and analyzed. A co-simulation model of the system was built to verify the control law. The results show that the properties of the prototype meet the design requirements. Given the importance of the NWSS, the simulation results can be used to optimize the basic design parameters. This methodology can also be used for other types of aircraft.

Application of GO methodology in reliability analysis of aircraft flap hydraulic system

2019 ◽  
Vol 124 (1272) ◽  
pp. 257-270 ◽  
Author(s):  
J. Ma ◽  
F. Duan
Keyword(s):  
Complex Systems ◽  
Reliability Analysis ◽  
System Reliability ◽  
Hydraulic System ◽  
Feedback Loop ◽  
Fault Tree Analysis ◽  
Safety Evaluation ◽  
Go Model ◽  
Go Methodology ◽  
Civil Aircraft

ABSTRACTThe Goal-Oriented methodology (GO methodology) is an effective method for the reliability analysis of complex systems. It is especially suitable for the reliability analysis of multi-state complex systems containing the actual logistics, such as current, airflow and liquid flow. In order to solve the limitation that the GO methodology is not suitable for the reliability analysis of the system with feedback loop, the Boolean algebra idea is introduced to construct the Boolean operation formula of the feedback loop. In this paper, a certain type of civil aircraft flap hydraulic system with feedback loop is taken as the research object. According to the structural schematic diagram of the flap hydraulic system, the GO model of the flap hydraulic system is established. Next, the GO calculation is carried out to obtain the reliability of the flap hydraulic system. The comparison between the system reliability without feedback loop and that with feedback loop proves that the GO methodology with feedback loop is more accurate. The reliability of the system is analyzed by using the fault tree analysis (FTA) method, and the GO methodology with feedback loop is compared with the FTA method to verify the availability and correctness of the GO methodology in the reliability analysis and safety evaluation of aircraft flap hydraulic system.

scholarly journals Thermal dynamics and thermal management strategy for a civil aircraft hydraulic system

2020 ◽  
Vol 24 (4) ◽  
pp. 2311-2318
Author(s):  
Dong Li ◽  
Sujun Dong ◽  
Jun Wang ◽  
Yunhua Li
Keyword(s):  
Numerical Simulation ◽  
Thermal Management ◽  
Hydraulic System ◽  
Management Strategy ◽  
Management Strategies ◽  
Governing Equations ◽  
Management Mechanism ◽  
Thermal Dynamics ◽  
Civil Aircraft ◽  
Mission Profile

Addressing the growing severe heat-generation and temperature-rise issues of the civil aircraft hydraulic system, this paper proposes a thermal dynamic model and thermal management strategies for the system within full mission profile. Firstly, a new thermal dynamic modeling towards general hydraulic components is conducted. Secondly, thermal dynamic governing equations are derived. Then a thermal management mechanism of the system is proposed. The conducted research is prerequisite to future numerical simulation of the thermal dynamic characteristics, evaluation and improvement of thermal management strategies for the system.

scholarly journals Modeling and Analysis of Different Architecture for Civil Aircraft Hydraulic System

2021 ◽  
Vol 2068 (1) ◽  
pp. 012028
Author(s):  
Xunan He ◽  
YuanLi Kang ◽  
Yannian Hui
Keyword(s):  
Fuel Consumption ◽  
Hydraulic System ◽  
Modeling Method ◽  
Traditional Architecture ◽  
Modeling And Analysis ◽  
Important Index ◽  
Civil Aircraft ◽  
Weight Penalty

Abstract For the evaluation of civil aircraft hydraulic system, Fuel Consumption is a very important index. However, there is no effective method to perform analysis for different architecture. This paper proposes that taking fuel weight penalty as a major mathmatical modeling method to analysis traditional architecture and more electric architecture. The result shows that the fuel consumption of more electric architecture is less than traditional architecture.

Simulation of a prototype electrically powered integrated actuator for civil aircraft

1997 ◽  
Vol 211 (6) ◽  
pp. 381-394 ◽  
Author(s):  
R Crowder ◽  
C Maxwell
Keyword(s):  
Control Systems ◽  
Flight Control ◽  
Hydraulic System ◽  
High Performance ◽  
Electrical System ◽  
Electric Aircraft ◽  
Civil Aircraft ◽  
Simulation Results ◽  
Distribution Of Power ◽  
More Electric Aircraft

Developments in the design and proposed operation of large civil aircraft have resulted in aircraft manufacturers and equipment suppliers developing new system concepts, one of which is the all or more electric aircraft. In the all or more electric aircraft the distribution of power for flight actuation will be through the electrical system, as opposed to the currently used bulk hydraulic system. In order to implement power-by-wire, high-performance electrically powered actuators will be required. The paper discusses the design details, and the simulation of an electrohydrostatic actuator suitable for use in primary flight control systems of a civil aircraft. The paper presents experimental and simulation results, and identifies the parameters that will critically affect the performance of an actuator.

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