... pitch angle affects directional stability during high-speed ground-roll phases. Design/methodology/approach In this study, a generalized mathematical model for ground-roll dynamics is established based on simplified force analysis that considers the influence of landing gear configuration...

... 06 06 2023 12 01 2025 02 02 2025 © 2025 Emerald Publishing Limited 2025 Emerald Publishing Limited Licensed re-use rights only Dynamic mode decomposition Reynolds number Spectrum Coherent structure Stability A disk tip spike is able to form a conical separated...

..., the stability and control problems of nonlinear systems are studied. Design/methodology/approach A recently proposed integral inequality is selected based on the free-weight matrix, and the less conservative stability criterion is given in the form of linear matrix inequalities (LMIs). Findings Under...

...Katarzyna Pobikrowska; Tomasz Goetzendorf-Grabowski Purpose This paper aims to present stability analysis of a small pulsejet-powered airplane. This analysis is a part of a student project dedicated to designing an airplane to test valved pulsejet engine in flight conditions. Design/methodology...

... is applied to a homing, tail-controlled air vehicle. Adaptive backstepping controller technique is used to deal with the problem, and the Lyapanov theory is used in the stability analysis of the nonlinear system. A nonlinear model of normal force coefficient is obtained from an existing nonlinear model...

...Tomasz Goetzendorf-Grabowski; Tomasz Antoniewski Purpose Unconventional configuration aircrafts are not often designed because of many problems, mainly with stability and trim. However, they could be very promising. The problems can be compensated by extraordinary performance and some flying...

... configurations can greatly improve the longitudinal stability and enhance the longitudinal aerodynamic characteristics for the whole rocket. The total drag of the whole rocket is mainly stemmed from the body, while the drag generated by the WAF account for only about 7.42 per cent. The extra side forces...