CN107452249A - A kind of sound system of flight simulator - Google Patents
A kind of sound system of flight simulator Download PDFInfo
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- CN107452249A CN107452249A CN201710674573.6A CN201710674573A CN107452249A CN 107452249 A CN107452249 A CN 107452249A CN 201710674573 A CN201710674573 A CN 201710674573A CN 107452249 A CN107452249 A CN 107452249A
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- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 3
- 235000008434 ginseng Nutrition 0.000 claims description 3
- 238000004088 simulation Methods 0.000 abstract description 8
- 238000007654 immersion Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 230000008447 perception Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000007499 fusion processing Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 13
- 230000001052 transient effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000004927 fusion Effects 0.000 description 5
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
- G09B9/22—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer including aircraft sound simulation
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Abstract
The invention belongs to flight simulation technology field, discloses a kind of sound system for flight simulator, and the system includes：The audio amplifiers for being positioned only at driving cabin, the multiple sound cards being connected with the more audio amplifiers, the sound card are connected more with sound equipment control main frame, and the sound equipment control main frame carries out real time fusion process to sound clip, drive sound card, are played out by audio amplifier；The more audio amplifiers are using the profile of driving cabin as positioning datum, front is parallel with driving cabin shell body and towards cockpit, arranged after the front direction of driving cabin in multiple row, bottom up from driving cabin is arranged and be symmetrically distributed in around major-minor driver's seat in multilayer.The present invention makes driver reach auditory perception on the spot in person, enhances the feeling of immersion and the sense of reality of the flight simulator that drives an airplane, reached the requirement of D level aircraft flight simulation machines by Space integration.
Description
Technical field
The invention belongs to flight simulation technology field, and in particular to a kind of sound system for Aircraft Simulator.
Background technology
In the design of D level aircraft flight simulations machine, audio system is one of important subsystem, in the subjectivity of characterization test
Item, objective Xiang Zhongjun are distinctly claimed., it is necessary to according to the state of flight of aircraft different time when analog machine is run, play in real time
The audio files of corresponding diverse location source of sound, to build real cabin ambient.It is primarily present following difficult point：
(1) Space integration：Aircraft sounding position corresponding to source of sound is different, it is necessary to which one or more passages of relevant position come
Construct sounding environment.
(2) real time fusion：The state of aircraft is different, may trigger different sound and play, existing source of sound is all aircraft
Acoustic environment in a period of time under given conditions, how by the audio files under multiple specified conditions go construct aircraft it is complete
Acoustic environment under status condition is a difficult point.
Therefore, effective integration can be carried out by the two aspects by being badly in need of one kind, to reach the design of D level aircraft flight simulations machine
Audio system requirement.
The content of the invention
The invention provides a kind of sound system for flight simulator, solves existing sound simulation system space and melts
Difficulty is closed, plays the problem of embodying stereo 3-D effect.
The present invention can be achieved through the following technical solutions：
A kind of sound system for flight simulator, including：The audio amplifiers for being positioned only at cockpit, described in more more
Audio amplifier is using the profile of driving cabin as positioning datum, and front is parallel with driving cabin shell body and towards cockpit, from driving
After the front direction in cabin in multiple row arrange, from driving cabin it is bottom up in multilayer arrange and be symmetrically distributed in major-minor driver's seat week
Enclose.
Further, the multiple row be included in driving cabin front one arrange, centre two row, rear one arranges and rear center one
Row；The multilayer is included in one layer of driving cabin bottom, middle one layer and one layer of top.
Further, the audio amplifier is provided with 13, is arranged in five layer of eight row around major-minor driver's seat, is driven in major-minor
Respectively one audio amplifier of setting, upper strata center respectively set an audio amplifier in front of seat, and respectively one audio amplifier of setting, upper strata rear are each for upper strata inside
One audio amplifier is set, and rear side respectively sets an audio amplifier, an audio amplifier, lower floor rear centrally disposed one are respectively set in front of lower floor
Woofer.
Further, in addition to the more audio amplifiers the multiple sound cards being connected, the sound card are connected with sound equipment control main frame,
After the sound equipment control main frame is handled the sound clip in flight course, according to OpenAL play rules, sound is realized
Fragment play parameter to OpenAL broadcast source parameters conversion, so as to drive sound card to be played by audio amplifier.
Further, sound clip play parameter and OpenAL the broadcast sources parameter includes gain coefficient, broadcast mode
And location parameter, both correspond,
The gain coefficient is the broadcast sound volume of sound clip；Broadcast mode includes loop play and single play；Position
Parameter is expressed as the position coordinates of corresponding each sound clip actual play, and the position coordinates uses driver's cabin sound test point
For origin, along airplane pitch axis to the right, vertically upward, Z axis is along the coordinate under aircraft longitudinal axis coordinate system backward for Y-axis for X-axis.
Further, the sound equipment control main frame selects audio amplifier by location parameter, carries out sound clip broadcasting.
The beneficial technique effect of the present invention is as follows：
The present invention carries out three-dimensional system of coordinate centered on sound test point in cockpit, to 13 audio amplifiers and is accurately positioned, and leads to
The algorithm crossed in sound equipment control program sets OpenAL location parameters, and all sound materials are distributed into three-dimensional space with having directive property
Between in, a brand-new surround sound is formed around test point, so that driver reaches auditory perception on the spot in person, is increased
The strong feeling of immersion and the sense of reality for the flight simulator that drives an airplane, has reached the requirement of D level aircraft flight simulation machines.
Brief description of the drawings
Fig. 1 is the overall construction drawing of the present invention；
Fig. 2 is the top view of the general structure of the present invention；
Fig. 3 is the right view of the general structure of the present invention；
Fig. 4 is the definition coordinate system of location parameter in sound clip play parameter and OpenAL broadcast source parameters of the invention
Schematic diagram；
Fig. 5 is flow chart of the method for the present invention；
Fig. 6 is the OpenAL audio play parameter method for transformation flow charts of the present invention；
Wherein, left voice box in front of 1-, right voice box in front of 2-, 3- upper stratas center left voice box, 4- upper stratas center right voice box, on 5-
The internal left voice box of layer, 6- upper stratas inside right voice box, 7- upper stratas rear left voice box, 8- upper stratas rear right voice box, 9- rears side are left
Audio amplifier, 10- rears side right voice box, 11- lower floors front left voice box, 12- lower floors front right voice box, 13- lower floors rear subwoofer.
Embodiment
Below in conjunction with the accompanying drawings and preferred embodiment describes the embodiment of the present invention in detail.
Now with many sound systems, it is possible to achieve sound recording and broadcasting, to reach the circular effect of fine 3 D stereo
Fruit, such as Doby.Due to the sShape features of flight simulator in itself, while the complexity of cost and manufacturing process is considered,
The needs of existing sound system unairworthiness analog machine in itself.
Therefore, the invention discloses a kind of sound system for flight simulator, including it is positioned only in driving cabin more
The audio amplifier in portion, the more audio amplifiers are using the profile of driving cabin as positioning datum, positive parallel with driving cabin shell body and direction
Cockpit, arranged after the front direction of driving cabin in multiple row, from the bottom up in multilayer arrangement and symmetrical of driving cabin
It is distributed in around major-minor driver's seat.The front one that multiple row is included in driving cabin arranges, centre two arranges, rear one arranges and rear center one
Row；Multilayer is included in one layer of driving cabin bottom, middle one layer and one layer of top.
The present embodiment is so that 13 are positioned only at the audio amplifier of driving cabin as an example, as shown in figure 1, this 13 audio amplifiers are with driving cabin
Profile be positioning datum, front is parallel with driving cabin shell body and towards cockpit, is symmetrically distributed in major-minor driving
Around seat.Arranged after the front direction of driving cabin in eight row, as shown in Figure 2；Bottom up from driving cabin is in five layers of arrangement, such as
Shown in Fig. 3.Specific distribution is as follows：One audio amplifier is respectively set in front of major-minor driver's seat, upper strata center respectively sets an audio amplifier, on
Internal respectively one audio amplifier of setting of layer, upper strata rear is each to set an audio amplifier, and rear side respectively sets an audio amplifier, and lower floor front is respectively
One audio amplifier, the centrally disposed woofer in lower floor rear are set.This 13 audio amplifiers and two seven points one sound channel sound cards and
One integrated sound card is connected, and these three sound cards are connected with sound equipment control main frame, sound of the sound equipment control main frame to flight course
Fragment carries out real time fusion process, drives sound card, is played out by audio amplifier.
The distribution of sound box is based on the binaural effect theory of people, using human auditory system to voice signal property
Identification, audio amplifier space orientation is carried out in the keypoint part for pressing close to cockpit shell.Drive, slide, take off, climb, patrol from aircraft
Navigate, decline, enter it is near, land, until start authority vehicle, pilot in cockpit can vivid sense by the normal ring in flight course
Border noise, airflow noise, engine sound, undercarriage control sound, wing flap folding and unfolding and flap folding and unfolding sound, raindrop strike windscreen glass
Glass sound, rain brush movement sound, various alarm sounds, wheel and rattle of the grating on ground and aircraft etc., make to fly
Office staff is placed oneself in the midst of in real 3 D stereo surround sound.
This 13 audio amplifiers are distributed in different locus and (are shown in Table 1, wherein H is installation position angle, and V is installation pitching
Angle；Reference frame is as shown in figure 4, azimuth is just to the right, and the angle of pitch is upwards for just), it is different according to actual sounding position
Sound can occur, change, translating, disappearing in the audio amplifier of relevant position, at a time can according to location parameter determine by
The a certain independent sounding of audio amplifier, or more discrete loudspeaker box combination sounding, the continuity of sound fusion is ensure that, also enhances sound
Identification, driver is reached auditory perception on the spot in person, enhance the feeling of immersion of the flight simulator that drives an airplane and true
True feeling.
The audio amplifier space layout table of table 1
The sound channel and the corresponding relation of audio amplifier that first seven points one sound channel sound card is used be：Front left-FLS, front right-FRS,
A rear side left side-BLS, the rear side right side-BRS, upper rear left-HBLS, upper rear right-HBRS；What second seven points one sound channel sound card was used
The corresponding relation of sound channel and audio amplifier is：Lower front left-DFLS, lower front right-DFRS, a upper interior left side-HILS, the upper interior right side-HIRS, on
A middle left side-HCLS, the upper middle right side-HCRS, sound card connection subwoofer (DBCD) is integrated, according to system requirements, subwoofer needs independence
Control.
The combination is different from traditional five points one or seven points one sound channels
Using driving cabin profile as positioning datum, 13 audio amplifiers are subjected to weight using two seven points one sound channel sound cards and an integrated sound card
New distribution.Audio amplifier is centered on sound test point in driving cabin, carries out three-dimensional system of coordinate and be accurately positioned, lead to as sound generation source
All sound materials are distributed in three dimensions by the algorithm crossed in sound equipment control program with having directive property, and one is formed in test point
Individual brand-new surround sound.
The invention also discloses a kind of sound system based on described above for flight simulator to carry out multiple channel acousto
Sound real time integrating method, comprises the following steps, as shown in Figure 5：
Step 1: the flight parameter come out according to the master controller real-time resolving of flight simulator, influences to join according to feature
Number extracting method, analysis determine the feature affecting parameters of mission phase and corresponding each mission phase；
Mission phase is divided into ground roll-out according to flight course, takes off, climbs, cruises, declines, enters near, lander
Main Stage, the acoustic environment major influence factors in each stage are different.With reference to the flight parameter change in whole flight course
The audio files provided with planemaker, extract the feature affecting parameters in each stage.
1. ground roll-out --- motor power
Engine start has obvious sound characteristic with when cut-offfing.When thrust consecutive variations, front and rear thrust variation compared with
When big, sound has significant difference in size and frequency；When thrust variation is smaller, sound is distinguished smaller in size and frequency.
2. take off --- undercarriage control state, flap angle
Under takeoff condition, liftoff moment sound has significant change, and engine sound influences to be gradually reduced, undercarriage and wing flap
Major influence factors are turned into the impulsive sound of air-flow.When undercarriage is in down state, air speed is bigger, and sound is bigger；When rising and falling
When frame is packed up, sound is obviously reduced.When flap angle from large to small when, sound is obviously reduced.
3. climb --- height
During stable climb, motor power and aircraft airspeed change are smaller, are raised with height, atmospheric density drop
Low, the sound of aircraft impact air-flow reduces, and the change of adjacent height layer is smaller, and height layer difference changes greatly when larger.
4. cruise --- height, spoiler
During stable cruise, under the conditions of identical height, motor power and aircraft airspeed change are smaller.Risen with height
Height, atmospheric density reduce, and the sound of aircraft impact air-flow reduces, and adjacent height layer changes smaller, the larger time-varying of height layer difference
Change larger.When spoiler is opened, sound significantly increases.
5. decline --- height, spoiler
During stable decline, motor power and aircraft airspeed change are smaller, with height reduction, atmospheric density liter
Height, the sound increase of aircraft impact air-flow, the change of adjacent height layer is smaller, and height layer difference changes greatly when larger.Work as flow-disturbing
When plate is opened, sound significantly increases.
6. enter near --- undercarriage, wing flap, flow-disturbing board status
To enter near procedure, motor power, aircraft airspeed are smaller, and undercarriage, wing flap, spoiler put down or opened successively,
Aircraft configuration changes, and undercarriage, wing flap, the sound of spoiler impact air-flow turn into major influence factors.
7. land --- rate of descent, it is counter push away, spoiler
There is obvious strike note in landing mission, when aircraft contacts to earth, and change substantially with rate of descent, when rate of descent is larger,
Strike note is larger.After landing, opening is pushed away as engine is counter, engine sound influences obvious；After spoiler is opened, acoustic impacts
It is larger, and reduce with air speed and reduce.
Step 2: according to the mission phase of whole flight course and the changing rule of feature affecting parameters, to aircraft manufacturing
The audio files that business provides enters edlin, cut, and obtains multiple stable state and transient state sound clips of corresponding respective mission phase；
Stable state and transient state sound clip are according to mission phase and principal character affecting parameters, and planemaker is provided
Audio files enters (as shown in table 2) of edlin extraction, and wherein stable state represents that the front and rear change of the sound clip of interception is little, is in
Plateau, can be according to state of flight loop play；Transient state represents to change greatly before and after the sound clip of interception, represents a certain
Sound variation caused by transient volume, meet that only needs play once during playing condition.Wherein, N1 represents motor power size (0
~100%)；V represents aircraft airspeed, unit section (kts)；H represents aircraft altitude height, unit foot (ft)；Flap represents the flap
Wing angle；SinkRate represents rate of descent, unit feet per second (ft/s).
The sound clip for each mission phase that table 2 extracts according to feature affecting parameters
Step 3: according to practical flight parameter, to multiple stable state and transient state sound clip carry out sound of respective mission phase
Sound merges, the sound clip after being merged, and obtains the sound clip play parameter of corresponding each sound clip, the sound in real time
Tablet section play parameter includes whether broadcasting, gain coefficient, coefficient of frequency, broadcast mode and location parameter；
Specific sound fusion method comprises the following steps：
Step I, known multiple stable states or transient state sound clip according to respective mission phase, using following equation,
Calculate stable state or transient state sound clip under practical flight Parameter Conditions；
Wherein, SN1Represent stable state or transient state sound clip under practical flight Parameter Conditions, SN1kAnd SN1k+1Represent
Two stable states or transient state sound clip under the adjacent flight Parameter Conditions known, N1k,N1,N1k+1Represent flight parameter, a1And a2
Represent gain coefficient；
And/or step II, two sound clips according to priority broadcasting, using following equation, calculating includes transition rank
The whole sound clip of section；
Wherein, S represents the whole sound clip for including transition stage, S1Represent the sound clip first played, S2Broadcast after expression
The sound clip put, tstartThe sound clip for representing first to play starts the time exited, tendThe sound clip played after expression is complete
Into the time of entrance, ttransRepresent transit time, a3And a4Represent gain coefficient.
In sound clip play parameter whether play by current flight parameter judge to belong to which mission phase and then
Determine which sound clip plays；Broadcast mode includes loop play and single play, and above-mentioned stable state sound clip is used to follow
Ring plays, and above-mentioned transient state sound clip is used for single play；Location parameter is expressed as corresponding each sound clip actual play
Position coordinates, the position coordinates uses driver's cabin sound test point as origin, X-axis along airplane pitch axis to the right, Y-axis vertically to
On, along the coordinate under aircraft longitudinal axis coordinate system backward, the sound equipment control main frame passes through location parameter and selects audio amplifier Z axis, carries out
Sound clip plays.
Step 4: according to OpenAL play rules, according to OpenAL audio play parameter method for transformation, sound clip is realized
Play parameter to OpenAL broadcast source parameters conversion, so as to drive sound card to be played by audio amplifier.
First, OpenAL could support up while play 32 audio broadcast sources, just difficult when sound clip quantity is more than 32
To be corresponded with audio broadcast source, it is necessary to distribute audio broadcast source in real time for the audio files that needs play.Secondly, it is necessary to handle
Sound clip play parameter is converted into OpenAL audio broadcast source parameters.
Specific OpenAL audio play parameter method for transformation, as shown in fig. 6, wherein N is the audio files sum of loading.
The present invention includes Space integration and the aspect of real time fusion two, in terms of Co-factor propagation using in cockpit sound test point as
Center, three-dimensional system of coordinate is carried out to 13 audio amplifiers and is accurately positioned, OpenAL positions are set by the algorithm in sound equipment control program
Parameter is put, all sound materials are distributed in three dimensions with having directive property, a brand-new ring is formed around test point
Around stereo.
By four pole parameter conversion method in terms of real time fusion, ginseng is influenceed according to the feature during aircraft practical flight
The changing rule of number and audio, sound is carried out according to flight parameter and playing sequence respectively and merges to obtain the broadcasting ginseng of sound material
Number, and final OpenAL broadcast source parameters are converted into, realize the real-time broadcasting that audio changes with state of flight.
By the fusion in terms of the two, driver is reached auditory perception on the spot in person, enhance drive an airplane it is winged
The feeling of immersion and the sense of reality of row analog machine, the requirement of D level aircraft flight simulation machines is reached.
Although the foregoing describing the embodiment of the present invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, on the premise of without departing substantially from the principle and essence of the present invention, a variety of changes can be made to these embodiments
More or change, therefore, protection scope of the present invention is defined by the appended claims.
Claims (6)
- A kind of 1. sound system for flight simulator, it is characterised in that including：The audio amplifiers for being positioned only at cockpit more, For the more audio amplifiers using the profile of driving cabin as positioning datum, front is parallel with driving cabin shell body and towards in driving cabin Portion, arranged after the front direction of driving cabin in multiple row, bottom up from driving cabin arranges in multilayer and be symmetrically distributed in master Around front passenger's seat.
- 2. it is used for the sound system of flight simulator as claimed in claim 1, it is characterised in that：The multiple row is included in driving The front one in cabin arranges, centre two arranges, rear one arranges and rear center one arranges；The multilayer be included in one layer of driving cabin bottom, in Between one layer and one layer of top.
- 3. it is used for the sound system of flight simulator as claimed in claim 2, it is characterised in that：The audio amplifier is provided with 13 Only, it is arranged in five layer of eight row around major-minor driver's seat, an audio amplifier is respectively set in front of major-minor driver's seat, and upper strata center is respectively set An audio amplifier is put, an audio amplifier is respectively set inside upper strata, upper strata rear respectively sets an audio amplifier, and rear side respectively sets a sound Case, lower floor front respectively set an audio amplifier, the centrally disposed woofer in lower floor rear.
- 4. it is used for the sound system of flight simulator as claimed in claim 1, it is characterised in that：Also include and the more sounds The connected multiple sound cards of case, the sound card are connected with sound equipment control main frame, and the sound equipment control main frame is to the sound in flight course After tablet section is handled, according to OpenAL play rules, realize sound clip play parameter to OpenAL broadcast source parameters Conversion, so as to drive sound card to be played by audio amplifier.
- 5. it is used for the sound system of flight simulator as claimed in claim 4, it is characterised in that：The sound clip plays ginseng Number and OpenAL broadcast sources parameter include gain coefficient, broadcast mode and location parameter, and both correspond,The gain coefficient is the broadcast sound volume of sound clip；Broadcast mode includes loop play and single play；Location parameter The position coordinates of corresponding each sound clip actual play is expressed as, the position coordinates uses driver's cabin sound test point as original Point, along airplane pitch axis to the right, vertically upward, Z axis is along the coordinate under aircraft longitudinal axis coordinate system backward for Y-axis for X-axis.
- 6. it is used for the sound system of flight simulator as claimed in claim 5, it is characterised in that：The sound equipment control main frame is led to Location parameter selection audio amplifier is crossed, carries out sound clip broadcasting.
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| CN111091740A (en) * | 2020-01-14 | 2020-05-01 | 中仿智能科技（上海）股份有限公司 | Sound operating system of flight simulator |
| CN112380621A (en) * | 2020-11-12 | 2021-02-19 | 北京航空航天大学 | Flight simulator sound simulation method based on ASIO |
| CN114999269A (en) * | 2022-06-10 | 2022-09-02 | 南京乐飞航空技术有限公司 | D-level flight training simulator sound system based on digital network audio |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107452249B (en) | 2019-07-02 |
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