scholarly journals Safety Assessment hydraulic system Aircraft H-8

2017 ◽  
Vol 9 (2) ◽  
pp. 39
Author(s):  
Cyrilus Sukoco Budiono
Keyword(s):  
Hydraulic System ◽  
Safety Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Assessment Process ◽  
System Safety ◽  
Markov Analysis ◽  
Tree Analysis ◽  
Failure Conditions ◽  
Secondary Power

Safety Assessment hydraulic system Aircraft H-8AbstrakSistem hidrolik termasuk secondary power yang digunakan untuk menggerakkan bidang atur kendali terbang, mengeluarkan dan melipat roda pendarat, dan memberikan tenaga pengereman ketika pesawat di darat. Kegagalan sistem hidrolik dapat menyebabkan pesawat hilang kendali sehingga memungkinkan pesawat mengalami kecelakaan dan jatuhnya korban jiwa. Penelitian ini membahas tentang penilaian keselamatan sistem hidrolik pesawat terbang H-8 yang mencakup proses penilaian keselamatan, regulasi mengenai sistem hidrolik pesawat terbang, beban-beban yang harus ditanggung oleh sistem hidrolik, dan prestasi sistem hidrolik pesawat H-8. Penilaian keselamatan dimulai dari melakukan identifikasi fungsi, kondisi kegagalan, efek kegagalan, dan mengklasifikasikan kondisi kegagalan dari sistem hidrolik tersebut.Kata kunci : System Safety Assessment (SSA), sistem hidrolik, Fault Tree Analysis (FTA), Markov Analysis (MA), Fanctional Hazard Asessment (FHA). Abstract A hydraulic system is one of the secondary power used to drive the flight control surfaces, retract and extend landing gears, and to provide power to wheel brakes when the aircraft is on the ground. The failure of the hydraulic system results in aircraft lost of control which can lead to aircraft accident and passenger deaths. This journals discusses the safety assessment of the hydraulic system to be used in H-8 aircraft which includes the safety assessment process, regulations of the aircraft hydraulic system, the hydraulic system loads, and the aircraft hydraulic systems performance. The safety assessment begins with identification and classification of the functions, failure conditions, the effects of failure, and classify the failure conditions of the hydraulic system.Key word : System Safety Assessment (SSA), hydraulic system, Fault Tree Analysis (FTA), Markov Analysis (MA), Fanctional Hazard Asessment (FHA).

Improving Dependability of Robotics Systems

2018 ◽  
pp. 6847-6858
Author(s):  
Nidhal Mahmud
Keyword(s):  
Fault Tolerant ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Cost Effective ◽  
Expressive Power ◽  
Tree Analysis ◽  
Sequential Dependencies ◽  
Dependability Analysis ◽  
Assessment Techniques ◽  
Failure Conditions

The use of robotics systems is increasingly widespread and spans a variety of application areas. From healthcare, to manufacturing, to space missions, these systems are typically conceived to perform dangerous or critical tasks. The nature of such tasks (e.g., surgery operations or radioactive waste clean-up) places high demands on the dependability of robotics systems. Fault tree analysis is among the most often used dependability assessment techniques in various domains of robotics. However, fault tree analysis of cost-effective fault tolerant robotics systems requires compositional synthesis of fault trees extended with the expressive power to allow analyzing the sequential dependencies among the components. Thereafter, a relevant experience from the automotive domain is presented. This consists mainly of a suitable synthesis approach that computes expressions of global failure conditions from the dysfunctional behavior local to the components. The benefits of the approach to dependability analysis of robotics architectures are highlighted by using a fault-tolerant example system.

Improving Dependability of Robotics Systems

2019 ◽  
pp. 1071-1084
Author(s):  
Nidhal Mahmud
Keyword(s):  
Fault Tolerant ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Cost Effective ◽  
Expressive Power ◽  
Tree Analysis ◽  
Sequential Dependencies ◽  
Dependability Analysis ◽  
Assessment Techniques ◽  
Failure Conditions

The use of robotics systems is increasingly widespread and spans a variety of application areas. From healthcare to manufacturing to space missions, these systems are typically conceived to perform dangerous or critical tasks. The nature of such tasks (e.g., surgery operations or radioactive waste clean-up) places high demands on the dependability of robotics systems. Fault tree analysis is among the most often used dependability assessment techniques in various domains of robotics. However, fault tree analysis of cost-effective fault tolerant robotics systems requires compositional synthesis of fault trees extended with the expressive power to allow analyzing the sequential dependencies among the components. Thereafter, a relevant experience from the automotive domain is presented. This consists mainly of a suitable synthesis approach that computes expressions of global failure conditions from the dysfunctional behavior local to the components. The benefits of the approach to dependability analysis of robotics architectures are highlighted by using a fault-tolerant example system.

Reliability and Fault Tree Analysis: Theoretical and Applied Aspects of System Reliability and Safety Assessment.

1977 ◽  
Vol 72 (358) ◽  
pp. 482 ◽  
Author(s):  
Robert G. Easterling ◽  
R. E. Barlow ◽  
J. B. Fussel ◽  
N. D. Singpurwalla
Keyword(s):  
System Reliability ◽  
Safety Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis

Research of the Node Ordering Technique According to the Shortest Fault Tree

2017 ◽  
Author(s):  
Guofeng Tang ◽  
Jingyu Zhang ◽  
Wei Gao ◽  
Qinfang Zhang
Keyword(s):  
Safety Assessment ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Binary Decision ◽  
Tree Analysis ◽  
Advanced Method ◽  
Probabilistic Safety Assessment ◽  
The Core ◽  
Minimal Cut Sets ◽  
Variable Ordering

Zero-suppressed Binary Decision Diagram (ZBDD) algorithm is an advanced method in fault tree analysis, which is developing quickly in recent years and being used in the development of the Probabilistic Safety Assessment (PSA) Quantification Engine. This algorithm converts a fault tree to a ZBDD structure, solves the minimal cut sets and calculates the top node unavailability. The ordering of the basic events and logical gates is the core technique of the ZBDD algorithm, which determines the efficiency of the ZBDD conversion and the size of the ZBDD structure. A variable ordering method based on the structure of the fault tree is developed in this paper, which gives a better basic events order by compressing the fault tree; meanwhile, the method offers a logical gates order. The nodes order derived from this method can accelerate the ZBDD conversion obviously.

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