Analyses of Flight Model Spacecraft Performance During Thermal-vacuum Tests PDF Download
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Author: Albert R. Timmins Publisher: ISBN: Category : Space vehicles Languages : en Pages : 32
Book Description
Malfunction data from the thermal-vacuum tests of 39 flight-model spacecraft have been analyzed. The results are interpreted in terms of the test variables and the spacecraft performance. The malfunction data are correlated with the test time as a single variable, and also with the composite variable of time plus temperature. The improvement in spacecraft performance is examined by means of malfunction rates, malfunctions per spacecraft, and the probability of no failure related to test time. The minimum thermal-vacuum test profile required for Goddard Space Flight Center spacecraft is verified, and the probability of a defect remaining undetected is estimated.
Author: Albert R. Timmins Publisher: ISBN: Category : Space vehicles Languages : en Pages : 32
Book Description
Malfunction data from the thermal-vacuum tests of 39 flight-model spacecraft have been analyzed. The results are interpreted in terms of the test variables and the spacecraft performance. The malfunction data are correlated with the test time as a single variable, and also with the composite variable of time plus temperature. The improvement in spacecraft performance is examined by means of malfunction rates, malfunctions per spacecraft, and the probability of no failure related to test time. The minimum thermal-vacuum test profile required for Goddard Space Flight Center spacecraft is verified, and the probability of a defect remaining undetected is estimated.
Author: Zhang Qingjun Publisher: CRC Press ISBN: 1000879585 Category : Science Languages : en Pages : 415
Book Description
Drawing on practical engineering experience and latest achievements of space technology in China, this title investigates spacecraft system design and introduces several design methods based on the model development process. A well-established space engineering system with spacecraft as the core is integral to spaceflight activities and missions of entering, exploring, developing and utilizing outer space. This book expounds the key phases in the workflow of spacecraft development, including task analysis, overall plan design, external interface, configuration and assembly design and experimental verification. Subsystems that function as the nuclei of spacecraft design and important aspects in the model development process are then examined, such as orbit design, environmental influence factors, reliability design, dynamics analysis, etc. In addition, it also discusses the digital environment and methods to improve the efficiency of system design. The title will appeal to researchers, students, and especially professionals interested in spacecraft system design and space engineering.
Author: Timothy J. Dickinson Publisher: ISBN: 9781423576686 Category : Heat pipes Languages : en Pages : 91
Book Description
Future spacecraft technologies require advanced high-temperature thermal control systems. Liquid metal heat pipes are considered ideally suited for such applications. However, their behavior during microgravity operation is not yet understood. This study investigated liquid metal heat pipe performance in such an environment. Three stainless steel/potassium heat pipes were flown on space shuttle mission STS-77 in May 1996. The objectives of the experiment were characterization of the frozen startup and restart transients, comparison of flight and ground test data to establish a performance baseline for analytical model validation, and assessment of three different heat pipe designs. Heat pipe performance was characterized prior to the flight experiment. Predicted performance envelopes for each heat pipe were determined from theoretical calculations. Performance baselines were established from ground thermal vacuum test results. These pre-flight results were compared with those from the flight experiment. Thermal resistances were calculated for comparison of each heat pipe design.
Author: Albert R. Timmins
Author: Albert R. Timmins
Author: A. R. Timmins
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Author: 
Author: 
Author: Zhang Qingjun
Author: Timothy J. Dickinson
Author: United States. Superintendent of Documents
Author: Institute of Environmental Sciences. Technical Meeting
Author: James C. McLane