The general-assembling process involves the fitter assembling and installation, electricity installation, initiating explosive device installation, thermal control implementation, measurement of installation precision, sealing performance test, quality characteristics test, mechanical environment test and thermal vacuum test, including many procedures, and cross working. With many procedures, and frequent cross-working. A large amount of work should be done manually, so human error is one of the main causes for the spacecrafts accidents. There is little operation space in the spacecrafts, and the equipment, cable, and pipe are assembled with a high concentration, resulting in low mechanization and automation of spacecraft assembly. There are many component, equipment, cable, and pipe of different systems assembled in the spacecrafts, with features of a high concentration, little open space, and poor visibility, some of which might even be in blind area. However, the satellite general-assembling process is complicated system engineering, reflected in the following facts that: Thus, it is necessary to assess the safety level of the satellite general-assembling process, and to analyze the factors that affect the safety of the satellite general-assembling process, so as to take effective measures timely to control risks. Once there is any abnormal state appearing in the satellite general-assembling process, it is most likely to cause irreversible damage to the product, resulting in a huge irreparable economic loss. The duration in orbit has been lengthened, and the orbital environment profile has become tougher, which proposes the strict requirement for the general-assembling process to assure the product without the slightest injury. With the continuous development of the scientific technology, the function intensity of the spacecrafts, taking the satellite as the typical symbol, is improving continuously. The rationality and feasibility of the proposed method model is proved by the engineering application, which provide the effective technical support for the risk control in satellite general-assembling process. The results also show that the risk could be mitigated, provided that the effectiveness of engineering measures against deficiencies in the most influential (sub-)factors is maintained. Results obtained from the analysis to risk sub-factors suggested that experience and techniques, narrow space and production rhythm are more detrimental to process risk than any other sub-factors. The factors are sorted according to their impact capabilities to the overall risk level, and the key points of risk control for satellite general-assembling process is clarified. Taking a satellite model as an example, the risks in the satellite general-assembling process are assessed comprehensively, and the risk levels are quantitatively measured. Furthermore, the risk factors are quantitatively analyzed, and the comprehensive risk assessment model is established in the end. With a fuzzy analytic hierarchy process, the hierarchy of risk factors in satellite general-assembling process is established, based on which, the weights of various risk factors are determined one by one. Measurement devices (pressure, temperature, flow, voltage, frequency etc.), precision engineering, medical devices, instrumentation for education (devices and software), sensor technology, mechatronics and robotics. Solid-state physics, radio engineering, telecommunications, control systems, signal processing, power electronics, electronic devices and circuits and automation. Operations research, systems engineering, management science, complex systems and cybernetics applications and information technologies Electronic Engineering
#ANALYTIC HIERARCHY PROCESS 3 LEVELS SOFTWARE#
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