Dynamics simulation of deployment of solar panels on oblique spacecraft

Fault Severity Evaluation and Improvement Design for Mechanical Systems Using the Fault Injection Technique and Gini Concordance Measure

“…The Gini concordance is adopted in evaluating the severity of the fault caused by particular links. On the basis of (14) two ascending sequences are depicted as [19]…”

“…Torsion springs are often chosen to drive the solar array and the locking spring is used to make the solar array fixed after deployment. The driving mechanism Inappropriate driving torque of the locking torsion spring 10 Fault of the motor 11 Fault of the transmission unit 12 Impact caused by particles in space 13 Vibration caused by clearances of hinges 14 Bad thermal characteristic of honeycomb materials in the hinges 1 ∼ 4 are noted as 1 ∼ 4 and the locking mechanism in the hinges 1 ∼ 4 are noted as 1 ∼ 4 . The CCLs meet the requirement of motion coordination and synchronization during deployment, which are organized as CCL 1 , CCL 2 , and CCL 3 in Figure 9(c).…”

“…. , 14) are the notations of the bottom events of the system. Only the course of deployment and locking is considered in this paper.…”

“…These methods listed in [8][9][10][11][12][13] are verified effectively in reliability analysis of the distributed mechanical systems, but they did not consider more on whether the components are in good condition or not, rather than the dynamic performance. The third type is conducted, within the scope of dynamic properties, applying the numerical simulation to measure the dynamic properties of the mechanical system with faults and detecting the failure mechanism and weak links of the system [14,15]. But the methodologies are not developed and little literature related to this area has been published.…”

“…Namely, in the field of dynamic characteristic based methodologies, the indicators which reveal the uniqueness of diverse faults have been scarcely reported. Thirdly, some scholars simulated the dynamical performance of the typical mechanical systems with faults [14,15], yet little methodologies have been carried out in the scope of experiments to validate the results and seek the fault-prone parts. Finally, it is well-recognized that improving the weak links of the system is more meaningful than promoting all of the parts in the system.…”