Questions of increase of a management efficiency by deliveries of subject matters of material support due to application of the automated planning are considered. The functional model of process of planning of deliveries of subject matters of material support is considered. The example of the automated development of a plan of measures of engineering-aviation maintenance of study-operations of an aviation part is considered.
Article touches upon with a set of national and foreign Foresight projects devoted to future development of aviation industry including S&T Foresight until 2025, launched by the Institute for Statistical Studies and Economics of Knowledge, National Research University “Higher School of Economics” (ISSEK HSE). Special attention focuses on Roadmap “Use of nanotechnologies in aviation industry”.
The calibration of a strapdown inertial navigation system (SDINS) under the turn around the vertical axis is considered. The system measurements are the location and the relative velocities of the object. To implement the parameter estimation the Kalman filter is applied. The turn is required to obtain the estimates of the additive constant errors in the accelerometer unit and in the sensors of angular velocity with sufficient accuracy. The problem is studied in a unified experiment that include the turn around the axis and two static positions of the system during certain time intervals. The main difficulty is the presence of the derivative of the angular velocity in the system matrix. In order to overcome this circumstance, the sampling is executed by analytical calculation using the integration by parts. Such approach allows us to exploit all experiment data more fully. In traditional setting, the analyis is partitioned into two independent steps, which are related to the SDINS case positions before and after the turn. Besides, due to the alignment procedure, the initial covariance matrix is not diagonal. A mathematical formalization is presented, the corresponding software is developed, and the results of simulation are described. The obtained results verify the efficiency of the proposed approach. The system accuracy is really improved by the including the turn into the active part of the calibration experiment.
The article investigates interconnection and interdependence of company's fair value and market quotes dynamics. It also focuses on prospects of market forecasts based on changes in company's fair value. The research was made on the basis of US Aerospace&Defence industry and tested by creation and following analysis of virtual portfolio of selected companies.
In aerospace industry one of the main issues is the problem of the qualified specialists education. During the learning process positive incentives improve the effectiveness of the education . One of such incentives is the rating system. In this work the construction and evaluation of the specialized rating system is regarded with examples on the distance learning system that is used for learning mathematical courses by students of aerospace disciplines.
An onboard radar operating in the impulse–Doppler mode has the characteristic features of the detection zone. The feature lies in the fact that at every point of the detection zone an airborne object has a sector of directions such as the onboard Doppler radar will not detect it as long as it moves in these directions. This sector is called the sector of invisible motion directions of the flying object. Due to these features, there exist hidden trajectories such as objects which are flying along such trajectories are not detected by an onboard Doppler radar such as AWACS radar. The most hidden trajectories are non-linear path with a variable curvature. However, under certain conditions, rectilinear secretive trajectories also exist. They are easier then nonlinear hidden trajectories, and therefore, are of a particular interest.
The research is to develop tabular-analytical and tabular-approximating methods of altitude evaluation statistics calculations according to a digital height map. The subject matter is the comparative evaluation of the relief height statistics calculations methods. The analysis of mathematical expectation and height dispersion method errors by means of tabular-approximating method is provided. The aim is to increase the accuracy of flight altitude evaluation according to a digital height map while counting prognostic flight path by means of on-board inertial navigation system. As a result of a numerical experiment using the tabular-analytical method the following boundary values of errors are defined: the maximum error of mathematical expectation does not exceed 0,3 meters for a mathematical expectation evaluation and 0,25 meters for root-mean-square deviation of relief height evaluation. The research results allow recommending the tabular- approximating method for practical use during low-altitude aircraft flight echelon formation. Also it is necessary to pointout the fact that the needed computing resources do not depend on planned coordinates errors during a fixed flight time.