http://dx.doi.org/10.5028/jatm.v5i1.192 The present work addresses a sensitivity analysis investigation of the aeroelastic stability margins for the VSB-30 sounding rocket during the atmospheric flight phase.Parametric stability analyses are performed considering variations of the inertia properties of the modular payload.Such variations can be cau
This paper focuses on the establishment of the online structural health monitoring strategy for rotating shafts using ultrasonic guided waves.The dispersion of cylindrical shaft is investigated and a apac1/60/1/cw conclusion that the longitudinal ultrasonic wave propagating along the cylindrical shaft can hardly be interfered by the rotation is obt
The flexcon reverse osmosis water storage tank South African manager: Challenges and dilemma The South African working environment is typified by two extremes.On the one hand there is an over-supply of unskilled labour, whilst on the other hand there is a severe shortage of qualified persons which have the applicable experience.In addition white ma
Introduction: priapism is defined as a prolonged and persistent erection of the penis that is unrelated to sexual desire; it can last more than 4 hours and constitutes a medical emergency.The incidence recorded in the general population is 1,5 cases per 100,000 persons per year and in those over 40 years of age it reaches 2,9.Objective: flexcon rev
The problem of real-time optimal guidance is extremely important deva curl arc angel for successful autonomous missions.In this paper, the last phases of autonomous lunar landing trajectories are addressed.The proposed guidance is based on the Particle Swarm Optimization, and the differential flatness approach, which is a subclass of the inverse dy