CN103617323A - Flutter data processing framework based on flight test - Google Patents

Abstract

The invention belongs to the technical field of aviation test flight, and particularly relates to a flutter data processing framework based on a flight test. The flutter data processing framework based on the flight test comprises a platform management system, a basic function module, an auxiliary function module and a bottom layer supporting module; the platform management system is used for resource dispatch and operational process management of a platform, the basic function module is used for processing data of a general flutter flight test, the auxiliary function module is used for analyzing flutter test flight data which are specific or are not provided with a currently established clear data processing technology system, the bottom layer supporting module is used for providing a basic environment supporting normal operation of the platform and basic software shared by each function module of the platform. The flutter flight test data processing platform concept and a top layer design framework are primarily raised, a plurality of layers such as a flight test mode, an incentive mode, the observation signal property, a processing mode, a processing task, a processing method and the like are projected in one unified framework, and therefore tradition, modernization, existence and development are coordinated in a higher level.

Description

A kind of flutter data processing framework based on flight test

Technical field

The invention belongs to aviation Flight Test Technique field, be specifically related to a kind of flutter data processing framework based on flight test.

Background technology

Flutter is a kind of autovibration that elastic construction forms under the interaction of aerodynamic force, inertial force and elastic force.Due to the interdisciplinary feature of flutter and the imperfection of correlation theory at present, correlation test and data analysis technique are become define the final means of airplane flutter quality.In general, the improved aircraft in type aircraft or structure (configuration) aspect all needs to carry out corresponding flutter test, flutter is taken a flight test as one of important step of aircraft checking, scientific research and sizing, there is typical excessive risk, height expends and long period feature, is the internationally recognized I class risk subject of taking a flight test.

Data processing is one of key link of airplane flutter Flight Test Technique, is the important technical of obtaining conclusion (of pressure testing), guaranteeing flutter test safety, reduce test and expend, shorten the aspects such as test period and have very important effect.The core missions of flutter flight test data processing comprise relevant parameters (tradition is called flutter modal parameter) and the flutter critical velocity (border) of determining structure flutter kenel.In view of the take a flight test nonrepeatability of excitation, test, remote measurement, record and flying condition in process of flutter, to corresponding data processing method with realize the requirement that technology has proposed intimate harshness, and then can have influence on the accuracy of conclusion (of pressure testing).

Flutter flight test has the features such as excessive risk, long period and financial cost are large.Due to the problem such as have in such test that exciting force is not enough, measurement point is limited, test condition is complicated and test condition is severe, the actual test figure quality recording is lower, tend to occur the phenomenons such as signal to noise ratio (S/N ratio) is low, effective sample is short, structural modal poor stability, thereby increased considerably the technical difficulty of flutter flight test data processing.

High risk due to flight flutter test, implement for a long time blockade on new techniques abroad always, be difficult to obtain the data processing technique frame system that external flight test mechanism verified, fast development along with our state aviation armament systems, the progressively growth of flight flutter test engineering experience, how from the engineering viewpoint of flight flutter test, research and analyse the data processing framework of planning China, the flutter data processing framework of design flight test seems minute urgently.

Summary of the invention

Goal of the invention: for method, feature and the technical need of the various flight flutter tests of military-civil aircraft, on the basis of the domestic and international current research present situation of comprehensive analysis and domestic prior art condition, the method of flight flutter test data processing and technology are sorted out, plan as a whole present Research both domestic and external and development trend, further standard, abundant, perfect and raising flutter test flight data treatment technology, provide a kind of flutter data processing framework based on flight test.

Technical scheme: a kind of flutter data processing framework based on flight test, comprises platform management system, basic function module, subsidiary function module and basic-level support module;

Platform management system is for scheduling of resource and the operational scheme management of platform, comprise interface, man-machine conversation, communication interface, test figure loading, data processed result output, result report generation, online help, data base administration, be responsible for carrying out flutter flight test data acquisition, process result output, the while is the data in this each stage of process of management properly;

Basic function module, for the data processing of conventional flutter flight test, contains the mode of taking a flight test, energisation mode, observation signal character, data processing method, data processing task and data processing method;

Subsidiary function module, for analysis relatively special or that not yet set up the flutter test flight data of explicit data treatment technology system, comprising: the Conjoint Analysis that aeroelastic divergence ASE, Nonlinear Flutter, flutter are taken a flight test recruitment evaluation and designed with flutter at present;

Basic-level support module, for Essential Environment and the shared basic software of each functional module of platform of the normal operation of platform that provides support, comprises running environment software, pretreatment software, other shareable data process software and data base management system (DBMS); Database is for depositing and manage that each functional module is used and necessary original, process and result data.

Beneficial effect: the present invention is according to flight flutter test data handling procedure and engineering application characteristic, and the flutter data processing architecture design based on flight test adopts function module design technology, has filled up domestic flutter flight test blank.The present invention has the following advantages:

Flutter flight test data processing platform (DPP) concept and Top-layer Design Method framework have been proposed first, the many levels such as the mode of taking a flight test, energisation mode, observation signal character, processing mode, Processing tasks and disposal route are placed under a unified framework and are planned, tradition and modern, Existence and development are coordinated on higher level, had stronger professional and advanced;

Basis function expansion and particle filter method have been studied first at the application problem of flutter flight test Data processing, and be introduced into structure modal parameter estimation and Flutter Boundaries prediction field, further expand and enriched traditional flutter test flight data disposal route and realized technology;

In real-time analysis with process two kinds of data processing methods, flutter modal parameter estimation and Flutter Boundaries and predict that two class flutter data processing functions and multiple pre-service and auxiliary process function aspects have realized higher level optimization and coordinated afterwards, prior art has been carried out to reasonable integration, the lasting expansion of subsequent technology is being retained to sufficient development space;

By rationally effectively interface, data processing method screening and Data Communication in Computer Networks, realized the take a flight test Real-Time Monitoring of process of flutter, to improving the safety that flutter takes a flight test, there is direct meaning;

The present invention carries out according to the demand of actual flutter flight test, and therefore, flutter flight test data handling system has more direct engineering practicability and applicability.

Accompanying drawing explanation

The general frame of Fig. 1 flight flutter test data processing framework

Fig. 2 flight flutter test data processing architecture platform management system framework

Fig. 3 flight flutter test data processing framework basic function module framework

Fig. 4 flight flutter test data processing framework subsidiary function module architectures

Fig. 5 flight flutter test data processing framework basic-level support module architectures

Embodiment

Below in conjunction with accompanying drawing, a kind of embodiment of invention is described in further detail, refers to Fig. 1 to Fig. 5.

The present invention holds from many levels such as the mode of taking a flight test, energisation mode, observation signal character, processing mode, Processing tasks and disposal routes, and tradition and modern times, Existence and development are coordinated on higher level; Aspect the selection of data processing method, except taking into account traditional means, guarantee, inheritance, more to emphasize method advance in theory and the optimal combination of each link of flight flutter test data processing to possess advance and engineering adaptability; The aspects such as method selection, flow process, interface, computational accuracy and travelling speed meet the actual demand of flight flutter test; Between Various types of data disposal route, mutually coordinate and organic complementary, form an integral body; Developing operation environment and each functional module of platform possess extensibility; Adopt user oriented modular design, software has good systematicness, can safeguard row and extensibility, is convenient to enriching constantly and expanding of its function and content; Functional module adopts independent design, and corresponding technical parameter adopts dialog box independently to arrange and has transferability; Result report has realized automatic generation, in the later stage that guarantees convenient technician under the conforming prerequisite of result, uses.

1 platform management system framework

Platform management system, for scheduling of resource and the operational scheme management of platform, comprising: interface, man-machine conversation (parameter or data processing method are set), communication interface, test figure loading, data processed result output, result report generation, online help, data base administration etc.Simply say to be exactly responsible execution flutter flight test data acquisition-data processing-provide data processed result whole process, simultaneously the data in appropriate this each stage of process of management.Flight flutter test data processing architecture design technology platform management system framework as shown in Figure 2.

2 basic function module frameworks

Basic function module, for the data processing of conventional flutter flight test, has contained the coverage of conventional art, is also the part that platform is the most complicated and most probable is verified.From the angle of taking a flight test, consider, basic function module framework is reasonably divided into six levels, respectively: the mode of taking a flight test, energisation mode, observation signal character, data processing method, data processing task and data processing method.Flight flutter test data processing architecture design technology basic function module framework as shown in Figure 3.

About basic function module framework, need to do following explanation:

1) naturally fly to comprise that continuous change flutter takes a flight test;

2) owing to being subject to the impact of five layers of correlative factor above, disposal route one deck is more numerous and diverse by the content relating to, and particular content is selected in connection with actual design exploitation;

Symbol: RT represents in real time or is online, and PT represents afterwards or off-line, and RM represents On-Line Dynamic Monitoring, and MP represents modal parameter, and FBP represents Flutter Boundaries prediction.

3 subsidiary function module architectures

Subsidiary function module, for analysis relatively special or that not yet set up the flutter test flight data of explicit data treatment technology system, comprising: the Conjoint Analysis that aeroelastic divergence (ASE), Nonlinear Flutter, flutter are taken a flight test recruitment evaluation and designed with flutter at present.Flight flutter test data processing architecture design technology subsidiary function module architectures as shown in Figure 4.

Subsidiary function module is only being used under (PT) state in principle afterwards, allows to call the related data analysis software in basic function module in data handling procedure.After once each submodule of subsidiary function module subordinate improves, through confirming to extend to basic function module.

ASE analyzes: the stability comprehensive analysis method of dynamic monitoring method, elastic construction and the flight control system of flutter modal parameter extracting method, Bode diagram and the Nai Shi figure estimating based on transport function, the ASE critical conditions decision method based on measured signal.

Nonlinear flutter analysis: the relationship analysis of nonlinear properties disposal route, Nonlinear feature extraction method, nonlinear characteristic and aircaft configuration flutter characteristic parameter.The introducing of time-varying parameter modeling method and the realization of algorithm thereof.The tradition flutter test flight data disposal route mostly hypothesis of the stationarity based on observation signal puts forward, and especially the dive flight test of a class of the actual flutter process of taking a flight test, its actual observation signal is nonstationary random process under stricti jurise.Basis function launches and the introducing of two kinds of time-varying parameter modeling methods of particle filter and algorithm can solve the signal analysis that non-stationary is observed to a certain extent, this has initiative meaning for the measured signal analysis that comprises structural nonlinear impact, thereby also for flutter test flight data processing platform Top-layer Design Method provides two kinds of basic methods.

The recruitment evaluation of taking a flight test based on test figure: due to complicacy and the changeable feature of practical flight condition, and some situation structure of getting off the plane or the nonlinearities change of aerodynamic force, the data processed result often only obtaining by a certain method judges that the character of flutter or critical point are more difficult.But flutter critical point is that exist and general or unique under particular flight condition, the therefore use by difference or several data disposal route and the comprehensive analysis of data processed result is just seemed to very necessary to the flutter assessment that effect carries out more can breaking of taking a flight test how.Specifically from two basic objects of flutter test data processing, start with, emphasis solves: the degree of confidence of each correlation technique and engineering correction are extracted, the convergence analysis of the multi-method result based on probability analysis.

Conjoint Analysis with flutter design: how to be the important process facing at present by measured data or data processed result with airplane flutter design effort combination.Primary mission aspect the Conjoint Analysis with flutter design is exactly to be design extraction Physics parameter or correction from test figure, and draws a conclusion to flutter flight test in conjunction with design calculation result.

4 base layer support module architectures

Base layer support module is for Essential Environment and the shared basic software of each functional module of platform of the normal operation of platform that provides support, and framework comprises running environment software, pretreatment software, other shareable data process software and data base management system (DBMS).Database for depositing and managing, use by each functional module, and necessary original, process and result data.Flight flutter test data processing architecture design technology base layer support module architectures as shown in Figure 5.

Claims (1)

1. the flutter data processing framework based on flight test, is characterized in that, comprises platform management system, basic function module, subsidiary function module and basic-level support module;

Platform management system is for scheduling of resource and the operational scheme management of platform, comprise interface, man-machine conversation, communication interface, test figure loading, data processed result output, result report generation, online help, data base administration, be responsible for carrying out flutter flight test data acquisition, process result output, the while is the data in this each stage of process of management properly;

Basic function module, for the data processing of conventional flutter flight test, contains the mode of taking a flight test, energisation mode, observation signal character, data processing method, data processing task and data processing method;

Subsidiary function module, for analysis relatively special or that not yet set up the flutter test flight data of explicit data treatment technology system, comprising: the Conjoint Analysis that aeroelastic divergence ASE, Nonlinear Flutter, flutter are taken a flight test recruitment evaluation and designed with flutter at present;

Basic-level support module, for Essential Environment and the shared basic software of each functional module of platform of the normal operation of platform that provides support, comprises running environment software, pretreatment software, other shareable data process software and data base management system (DBMS); Database is for depositing and manage that each functional module is used and necessary original, process and result data.

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