Alternative technologies of composite highly loaded aircraft structures: a qualitative method of making multi-criteria decisions. Comprehensive presentation: Part IV. Equilibrium and stability of the dynamic model of the ADS

The main direction of the fourth part of the work is the study of an autonomous dynamic system in the field of aviation technology, based on the provisions of the qualitative theory of differential equations with the involvement of the phase portrait method. The materials and results of the article are based on the starting points in the decision-making problem (DPR), specified [1], [3] empirically - the formalized direction of research in the comparison of preprego - autoclaved (surfactant) and non-autoclaved VARTM technologies in the manufacture of carbon-plastic aircraft structures according to the prevalence (first of all - quality) (AK) type of highly loaded stringer panels of the wing caisson (VSP) of mainline aircraft. That is, we are talking about a large multi-stage (based on ChTP) technological system. The research as a whole is based on systems analysis (SA) and interpreted structure-functional modeling of ATP. The evaluation toolkit and criterion-evaluation apparatus based on the macro-level ADS and a number of technological structures and other configurations are used [2]. Special points, stability and phase portrait of ADS (quadratic function) were investigated, with the involvement of interpreted elements of the topology of many species, as well as bifurcation points of the system.