Capabilities of onboard innovation measuring systems while ground and flight tests

Аuthors

Patrikeev S. A.

e-mail: pro1377@mail.ru

Abstract

The main modern aviation development trends are based on the fact that aircraft qualities are defined not only by carrier characteristics but also by onboard equipment complex capabilities.

High rates of airborne equipment development and creation intrinsic to recent years have come into contradiction with long service life of airframe and engine. Resolution of this conflict supposes abruption of an aircraft common life cycle as an aggregate of an aircraft and its equipment and shift to logically interrelated separate cycles of aircraft and onboard equipment complex development.

The problem discussed herein consists in optimum employment of cost and time resources in aircraft flight and engineering test practice.

Particularly, the flight and engineering tests are described, which essence consists in giving the answer to the question on how the flight task was realized with the accuracy not worse than the specified one.

Parametric expected uncertainty within the problem formulated has some specific distinctions from situations discussed within statistical decision theory.

First of all, the values of the parameters, which define the hypotheses under checking. These parameters, H₀ and H₁, are not defined (a priori) within the sets of their values Ω₀ and Ω₁, responsible for the system state (H₀ – the system complies with the requirements, H_{1 –} it does not), and are defined in the sense of the system state (“YES” – H₀, “NO” – H₁).

Secondly, inasmuch as on the assumption of employing information methods for optimization of surveillance planning stage at the interval of an aircraft's ground tests the situation, when the probability in the context of alpha and beta errors is required, is inadmissible. The decision making in this case will turn out to be unobtainable due to the lack of information in the sample of observations.

Substantiated information and cost approach, general formulation and the ways of resolving the problem of surveillance of ground measuring complex means while performing aircraft flight and engineering tests, ensures the effectiveness of flight tests with existing test pattern and requirement for minimum consumption of all kinds of resources.

Proved relationship and interpretation of the results open a possibility of obtaining analytical expression of informational measures necessary within the framework of the problem discussed and formulation of the task for ground measuring system equipment observation plan optimization.

While application of this method, the effectiveness of proposed models was about 9 –15 % of augmentation in terms of economic indicators, and instruments and general structures controllability by 15 – 20 %. Thus, general effectiveness of the proposed model equals to about 20%, which allows for attributing it to qualitatively new flight controllability structures.

Keywords:

flight development tests, onboard equipment, flight path, test planning optimization

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