CN109884335A - Vertical speed display processing system and method based on IIR filtering - Google Patents
Vertical speed display processing system and method based on IIR filtering Download PDFInfo
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- CN109884335A CN109884335A CN201910086458.6A CN201910086458A CN109884335A CN 109884335 A CN109884335 A CN 109884335A CN 201910086458 A CN201910086458 A CN 201910086458A CN 109884335 A CN109884335 A CN 109884335A
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Abstract
It include that pressure altitude obtains module, IIR filter module, vertical speed computing module and flow display algoritic module present invention discloses a kind of vertical speed display processing system based on IIR filtering, wherein pressure altitude obtains module to obtain pressure altitude；IIR filter module uses current gas pressure height to input as initial value, and the subsequent pressure altitude variation of real-time response carries out IIR filtering processing after completing convergence；Vertical speed computing module calculates vertical speed according to air pressure difference and sampling period using the stabilization atmospheric pressure value of IIR filter module output；Flow display algoritic module exports the to be shown vertical speed consistent with mechanical vertical speed table and exports to display screen and shows to moment variations of the analog mechanical vertical speed table under different vertical speed.
Description
[technical field]
The invention belongs to avionics system fields, in particular to the vertical speed display processing system based on IIR filtering
And method.
[background technique]
Traditional airborne mechanical vertical speed table acquires barometric information by pitot, in dial after sensor is converted
The disadvantages such as upper display, the pointer on dial are mechanical indicator, and that there is volumes is big, have a single function, real-time is low.With airborne
The electronization of equipment, dial is just gradually being integrated into the other display equipments such as display system substitution, therefore it is really necessary to develop one
The new vertical speed display processing method of kind.
[summary of the invention]
The purpose of the present invention is to provide it is a kind of based on IIR filtering vertical speed display processing system and method, to
Solve the problems, such as that the volume in existing traditional approach is big, have a single function, real-time it is low.
To achieve the above object, implement the vertical speed display processing system of the invention based on IIR filtering, including air pressure
Height obtains module, IIR filter module, vertical speed computing module and flow display algoritic module, and wherein pressure altitude obtains
Module is to obtain pressure altitude；IIR filter module uses current pressure altitude to input as initial value, completes real after restraining
When respond the variation of subsequent pressure altitude and carry out IIR filtering processing；Vertical speed computing module is steady using the output of IIR filter module
Determine atmospheric pressure value and vertical speed is calculated according to air pressure difference and sampling period；Flow display algoritic module is vertically fast to analog mechanical
Moment variations output of the degree table under the different vertical speed to be shown vertical speed consistent with mechanical vertical speed table is simultaneously defeated
It is shown out to display screen.
Preferably, pressure altitude obtains the module period to external static pressure converter sending atmospheric pressure request of data, static pressure
Converter, which receives, to be returned to pressure altitude for current atmospheric pressure after request and obtains module, and pressure altitude obtains module according to receiving
Atmospheric pressure be converted into pressure altitude.
Preferably, pressure altitude, which obtains module, directly obtains pressure altitude from external pressure altimeter.
To achieve the above object, implement the vertical speed display processing method of the invention based on IIR filtering, including as follows
Step:
Obtain pressure altitude；
IIR filtering is carried out to pressure altitude；
According to the stabilization atmospheric pressure value that IIR filter module exports, vertical speed is calculated according to air pressure difference and sampling period；
Moment variations output of the analog mechanical vertical speed table under different vertical speed and mechanical vertical speed table phase one
The vertical speed to be shown and output to display screen caused is shown.
Preferably, in the step of obtaining pressure altitude, if turned periodically from static pressure in the static pressure converter of peripheral hardware
Change device and obtain current atmospheric pressure, pressure altitude is converted into according to the atmospheric pressure received.
Preferably, in the step of obtaining pressure altitude, if there is the pressure altimeter of peripheral hardware, then directly from the air pressure
Altimeter obtains pressure altitude.
Preferably, this method further includes that iir filter coefficient and flow display coefficient are adjusted according to type demand
The step of.
Compared with prior art, the present invention is based on IIR filtering vertical speed display processing method using digital sample,
Digital processing, number display mode, adapt to airborne avionics system electronization trend, have can be adapted to a variety of air pressure input sources,
The features such as fast response time, display can integrate is suitable for various modern type.
[Detailed description of the invention]
Fig. 1 is the composition block diagram for implementing the vertical speed display processing system of the invention based on IIR filtering.
Fig. 2 is the flow diagram for implementing the vertical speed display processing method of the invention based on IIR filtering.
[specific embodiment]
Refering to Figure 1, to implement the composition side of the vertical speed display processing system of the invention based on IIR filtering
Frame schematic diagram.Implement it is of the invention based on IIR filtering vertical speed display processing system include pressure altitude obtain module,
IIR filter module, vertical speed computing module and flow display algoritic module.
Wherein pressure altitude, which obtains module, has two kinds of modes to obtain pressure altitude, and first way is to utilize external static pressure
Converter, pressure altitude obtain the module period to static pressure converter sending atmospheric pressure request of data, and static pressure converter receives request
Current atmospheric pressure is returned into pressure altitude afterwards and obtains module, pressure altitude obtains module and converted according to the atmospheric pressure received
At pressure altitude.The second way is directly to obtain pressure altitude from pressure altimeter if machine is equipped with pressure altimeter.
IIR filter module is inputted using current pressure altitude as initial value in power-up initializing, quickly completes receipts
After holding back, the subsequent pressure altitude variation of real-time response carries out IIR filtering processing, in the specific implementation can be by adjusting iir filter
Coefficient and/or filter length balance between real-time and stability.
The stabilization atmospheric pressure value that vertical speed computing module is exported according to IIR filter module, according to air pressure difference and sampling week
Phase calculates vertical speed.
Flow display algoritic module is the mathematical model of mechanical vertical speed table, and analog mechanical vertical speed table hangs down in difference
Moment variations under straight speed, output and its consistent vertical speed to be shown, finally show on a display screen.
In the specific implementation, it is connected between display and static pressure converter (not shown) by air plug, using RS232 interface.
Static pressure converter is connected with aircraft airspeed pipe, acquires aircraft exterior air pressure.Display is installed on cockpit front panel, convenient for flight
Member observes current vertical speed in real time.Pressure altitude obtains module, IIR filter module, vertical speed computing module, flow display
The function of algoritic module is realized on the signal-processing board of display interior.
It please refers to shown in Fig. 2, for the process for implementing the vertical speed display processing method of the invention based on IIR filtering
Schematic diagram, this method comprises the following steps:
Step 1: pressure altitude is obtained.
On machine without pressure altimeter, using the air pressure of static pressure converter output as data source, by quiet
The barometric information of pressure converter output calculates pressure altitude；And inquiry-reply communication mode is used, by central processing unit
The sampling rate for controlling static pressure converter, so can be according to different type of machines demand control traffic rate, while guaranteeing the reality of data
When property simultaneously meets airborne-bus requirement.
If there is pressure altimeter (not shown) on machine, pressure altitude directly is obtained from pressure altimeter.
Step 2: IIR filtering is carried out to pressure altitude.In the specific implementation, on the one hand since sensor precision itself is asked
Topic, there are more high fdrequency components for the pressure altitude being calculated after sampling, if directly calculating vertical speed with it, can exist
The case where vertical speed change dramatically, is reflected on vertical speed pointer, and vertical speed pointer can sharply be shaken, it is therefore necessary to
The pressure altitude of input is filtered smoothly.On the other hand, when aircraft flight, vertical speed rate of change is fast, pilot
High to vertical speed requirement of real-time, calculated vertical speed must be able to reflect aircraft true vertical speed in real time, FIR filtering
It is impossible to meet requirement of real-time for device.The present invention uses IIR filter module, has the features such as fast convergence rate, flatness are good, together
When, nonzero value initial method is sampled, using current level value as initialization value, when eliminating zero initialization bring convergence
Between too long problem and iir filter extreme point bring not convergence problem.
Step 3: calculating vertical speed, according to the stabilization atmospheric pressure value that IIR filter module exports, according to air pressure difference and adopts
The sample period calculates vertical speed.
Step 4: flow display processing, moment variations of the analog mechanical vertical speed table under different vertical speed, output
With its consistent vertical speed to be shown, finally show on a display screen.This step can be established by this step to be referred to stem-winder
The corresponding mathematics display model of needle physical characteristic shows digitlization with digital form analog mechanical pointer mechanical model
Vertical speed pointer it is consistent with mechanical list index rate of change, guarantee that pilot is converted to number by old-fashioned stem-winder indifference
Wordization shows vertical speed table.
In the specific implementation, iir filter coefficient and flow display coefficient can be adjusted according to type demand, provided than machinery
The faster pointer sensitivity of vertical speed table meets and indicates the higher usage scenario of requirement of real-time to vertical speed.
Compared with prior art, implement the vertical speed display processing system of the invention based on IIR filtering using number
The mode of sampling, digital processing, number display, adapts to airborne avionics system electronization trend, defeated with that can be adapted to a variety of air pressures
Enter source, the features such as fast response time, display can integrate, is suitable for various modern type.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (7)
1. a kind of vertical speed display processing system based on IIR filtering, it is characterised in that: the vertical speed that should be filtered based on IIR
Degree display processing system includes that pressure altitude obtains module, IIR filter module, vertical speed computing module and flow display algorithm
Module, wherein pressure altitude obtains module to obtain pressure altitude；IIR filter module uses current pressure altitude as just
Initial value input, the subsequent pressure altitude variation of real-time response carries out IIR filtering processing after completing convergence；Vertical speed computing module benefit
Vertical speed is calculated according to air pressure difference and sampling period with the stabilization atmospheric pressure value that IIR filter module exports；Flow display algorithm
Moment variations output and mechanical vertical speed table phase one of the module to analog mechanical vertical speed table under different vertical speed
The vertical speed to be shown and output to display screen caused is shown.
2. the vertical speed display processing system as described in claim 1 based on IIR filtering, it is characterised in that: pressure altitude
The module period is obtained to external static pressure converter sending atmospheric pressure request of data, static pressure converter will be currently big after receiving request
Atmospheric pressure returns to pressure altitude and obtains module, and pressure altitude obtains module and is converted into air pressure height according to the atmospheric pressure received
Degree.
3. the vertical speed display processing system as described in claim 1 based on IIR filtering, it is characterised in that: pressure altitude
It obtains module and directly obtains pressure altitude from external pressure altimeter.
4. a kind of vertical speed display processing method based on IIR filtering, includes the following steps:
Obtain pressure altitude；
IIR filtering is carried out to pressure altitude；
According to the stabilization atmospheric pressure value that IIR filter module exports, vertical speed is calculated according to air pressure difference and sampling period；
Moment variations output of the analog mechanical vertical speed table under different vertical speed is consistent with mechanical vertical speed table
Vertical speed to be shown and exporting to display screen is shown.
5. the vertical speed display processing method as claimed in claim 4 based on IIR filtering, it is characterised in that: obtaining gas
In the step of pressing height, if obtaining current atmospheric pressure, root from static pressure converter periodically in the static pressure converter of peripheral hardware
Pressure altitude is converted into according to the atmospheric pressure received.
6. the vertical speed display processing method as claimed in claim 4 based on IIR filtering, it is characterised in that: obtaining gas
In the step of pressing height, if there is the pressure altimeter of peripheral hardware, then pressure altitude directly is obtained from the pressure altimeter.
7. the vertical speed display processing method as claimed in claim 4 based on IIR filtering, it is characterised in that: this method is also
Including according to type demand, the step of iir filter coefficient and flow display coefficient are adjusted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910086458.6A CN109884335A (en) | 2019-01-29 | 2019-01-29 | Vertical speed display processing system and method based on IIR filtering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910086458.6A CN109884335A (en) | 2019-01-29 | 2019-01-29 | Vertical speed display processing system and method based on IIR filtering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113624258A (en) * | 2021-08-12 | 2021-11-09 | 武汉齐物科技有限公司 | Riding height calibration method and device |
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| CN101923101A (en) * | 2010-05-12 | 2010-12-22 | 西安交通大学 | Digital crosswind sensor for monitoring wind speed and wind direction of crosswind |
| CN105247320A (en) * | 2013-05-31 | 2016-01-13 | 旭化成株式会社 | Device for identifying changes in vertical direction using pressure measurement values |
| CN105675010A (en) * | 2016-01-18 | 2016-06-15 | 西安航空电子科技有限公司 | Aircraft combined atmospheric data instrument and control method thereof |
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- 2019-01-29 CN CN201910086458.6A patent/CN109884335A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923101A (en) * | 2010-05-12 | 2010-12-22 | 西安交通大学 | Digital crosswind sensor for monitoring wind speed and wind direction of crosswind |
| CN105247320A (en) * | 2013-05-31 | 2016-01-13 | 旭化成株式会社 | Device for identifying changes in vertical direction using pressure measurement values |
| CN105675010A (en) * | 2016-01-18 | 2016-06-15 | 西安航空电子科技有限公司 | Aircraft combined atmospheric data instrument and control method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113624258A (en) * | 2021-08-12 | 2021-11-09 | 武汉齐物科技有限公司 | Riding height calibration method and device |
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