Fig 5 - uploaded by Martina Rusconi
Content may be subject to copyright.
Number of intact objects (left) and fragments (right) distributions: target scenario, only-launches simulation and initial population profile.
Source publication
The population of objects in space faced an unforeseeable growth in the last decades. Therefore, it is now imperative to reiterate the debris mitigation guidelines and reconsider the approach to the debris proliferation problem. Different counteractions are available to deal with the situation. However, how to efficiently combine and apply these me...
Contexts in source publication
Context 1
... of application of the methodology in Section 3, the target scenario is defined as a fixed profile of the number of objects in each shell. It is visible in Fig. 5 and it has been obtained limiting up to a maximum of 50% the increase in the number of intact objects and fragments in each shell after 100 years, when simulating the species evolution under the effect of drag and launches only (see Fig. 5). Other initial settings of the analysis are given in Table 1. The weight matrices of the cost ...
Context 2
... the target scenario is defined as a fixed profile of the number of objects in each shell. It is visible in Fig. 5 and it has been obtained limiting up to a maximum of 50% the increase in the number of intact objects and fragments in each shell after 100 years, when simulating the species evolution under the effect of drag and launches only (see Fig. 5). Other initial settings of the analysis are given in Table 1. The weight matrices of the cost function Equation 10 are constant, diagonal and definite positive, where each diagonal element is equal to a i,i = for the B matrix. The maximum acceptable absolute errors e i,imax for intact objects and fragments in Table 1 Parameter Common ...
Context 3
... such as the launch rate, so the requirement on their final number in this region cannot be met. Region 2: 800-1000 km. Similarly to region 1, the target profiles in the number of intact objects and in the number of fragments put contrasting objectives on the controller. From the initial profile and the target distribution of intact objects in Fig. 5 it is possible to see how between 900 km and 1000 km the number of intact objects should be kept constant. In case 1, saturation of the control is required to act on the error in the number of fragments, causing an increasing error in the number of intact objects (see Fig. 8 and 10). However, even saturation of the control is not ...