AiMT Volume 14 (2018), Issue 1

Ejection Causes in Military Jet Aircraft in Czechoslovakia and the Czech Republic

O. Zavila and R. Chmelík

The article deals with the causes of ejections of crew members in military jet fighter, fighter-trainer and trainer aircraft in the service of Czechoslovakia and the Czech Republic from 1948 until the end of 2016. It presents a list of ejection causes by aircraft types on a timeline as well as historical and technical contexts, facts and development trends of these causes. Importantly, the role of the human factor in the causes of fire and false fire alarm emergency occurrences is also analyzed. The study is accompanied by a unique overview of reference and still accessible information sources on the subject.

Keywords: Army of the Czech Republic, ejection, aviation accident, human factor, jet aircraft, cause, statistics.

Pages: 5–20  [References]   [Download Citation]

Computationally Fast Dynamical Model of a SATCOM Antenna Suitable for Extensive Optimization Tasks

J. Najman, M. Bastl, M. Appel and R. Grepl

Development of new SATCOM (Satellite Communications) antennas and their control systems is a complex problem, in which strict requirements for mechanical design, drives, sensors and the overall speed and accuracy of the control algorithm must be met. Therefore, a simulation model is often used at different stages of development, which greatly accelerates the process of designing and optimizing the whole system. The computationally most demanding part of the simulation is the dynamical model of antenna. This article proposes an alternative approach for dynamical model creation, and the results are compared to a model created by using a universal multibody simulation environment. It is shown that the proposed new approach gives nearly the same-quality results and it is several times computationally faster.

Keywords: mobile SATCOM, antenna pointing, dynamical model, simulation, MATLAB, Simulink.

Pages: 21–30  [References]   [Download Citation]

The Military Specifications of Remote Control Tower Technology

T. Vas

Nowadays the Remote Control Tower (hereafter RTWR) appears as a piece of modern ATM (Air Traffic Management) technology in many European countries, including Hungary. After a successful validation process at a medium-sized civilian aerodrome called Liszt Ferenc, co-operation began between HungaroControl1 and the Hungarian Ministry of Defence concerning the introduction of the RTWR in the military environment. The author makes an attempt to determine the safety and the security aspects of RTWR in the military environment, its specifications for the handling of military air traffic and makes suggestions for further installations at given military airfields.

Keywords: remote control tower, military aerodrome traffic, air traffic controller procedures, visualization, safety enforcement, enhanced technology.

Pages: 31–45  [References]   [Download Citation]

Modelling Missile Flight Characteristics by Estimating Mass and Ballistic Parameters

J. Farlik, I. Hamtil and M. Kratky

This paper deals with one of the possible methods of a qualified estimation of tactical and technical parameters of surface-to-air or air-to-air guided missiles. This method is designed to estimate missile flight parameters if they are unavailable from public sources. Although the method does not provide exact values, it is sufficient for modelling and subsequent simulation. This method is based on the use of so-called “characteristic numbers” of the missile and on the assumption of validity of the hypothesis about the similarity of characteristic missile numbers of equal or, respectively, similar technological levels. To validate the obtained parameters, a method of mathematical modelling of the missile guidance process is used. The method can also be used for a qualified estimation of missile parameters in the case of an acquisition process.

Keywords: mass parameters, ballistic parameter, characteristic number, mathematical modelling.

Pages: 48–57  [References]   [Download Citation]