TY - JOUR ID - 166374 TI - FMECA-Based Risk Assessment in Monopropellant Hydrazine Propulsion System JO - علوم و فناوری فضایی JA - JSST LA - fa SN - 2008-4560 AU - Nadjafi, Mohammad AU - Naseh, Hassan AU - Sedigh Koochaki, Mehrdad AD - Assistant Professor, Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, Iran AD - M.Sc. Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, Iran Y1 - 2023 PY - 2023 VL - 16 IS - ویژه نامه انگلیسی SP - 39 EP - 50 KW - Monopropellant Hydrazine KW - Risk Assessment KW - FMECA KW - Expert Opinion KW - Failure modes DO - 10.22034/jsst.2023.1380 N2 - The Monopropellant Hydrazine Propulsion system is one of the most widely used types of single-agent propulsion systems to control the position or correction of satellites in orbits. This system consists of combustion chamber subsystems (catalyst bed, catalyst, nozzle, and cap), fuel and fuel tank, high-pressure tank, control valves, and interface pipes. In this paper, the MPHP system (as a case study) is described in detail, and then critical risks are identified by creating FMECA tables on the case study in the design phase. Based on the proposed FMCEA flowchart, potential failure modes are identified. In the next step, decisions and corrective actions are formulated regarding the inherent failures of the system. Finally, the necessary measures to reduce the risks will be taken according to the system's failure modes, and the reduction of the identified risks to an acceptable level is presented. The attained results show that the catalyst decomposition chamber, catalyst bed, inlet flow control valve, and propellant management facilities units have the highest risk index values (RPN), respectively. For this purpose, corrective measures have been suggested for each of these. UR - https://jsst.ias.ir/article_166374.html L1 - https://jsst.ias.ir/article_166374_41488a2aadfc6362ed776de8b09836a2.pdf ER -