Floating airship capsule swell capacity ground test and evaluation method and floating airship capsule swell capacity ground test and evaluation system

Abstract

The invention discloses a ground testing and evaluating method and system for the swell capacity of a capsule body of a floating airship. The method comprises the steps that the residual buoyancy weight of the airship is obtained; the front auxiliary air bag volume and the rear auxiliary air bag volume of the airship are obtained; acquiring the atmospheric density, the helium airbag density, the front auxiliary airbag density and the rear auxiliary airbag density; acquiring the mass of a front auxiliary airbag and the mass of a rear auxiliary airbag; the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag are added and multiplied by the density of the helium airbag to serve as a minuend, the minuend is subtracted from the mass of the rear auxiliary airbag, the difference value is added with the residual buoyancy weight of the airship and the mass of the front auxiliary airbag, the addition result serves as a numerator, and the difference between the atmospheric density and the density of the helium airbag serves as a denominator; acquiring the actual volume of the airship airbag; according to the ratio of the actual volume of the airship airbag to the designed theoretical volume of the floating airship, the swell capacity of the airship airbag is obtained; the method has the advantage that the swell capacity of the capsule body of the floating airship can be accurately calculated and evaluated.

Description

Technical Field

[0001] The invention relates to the field of aviation airships, and in particular to a ground test and evaluation method and system for the expansion amount of a floating airship bladder. Background Art

[0002] Airships are gradually being used in the civilian field because of their ability to stay in the air at a fixed point, high cost-effectiveness, long hovering time, and buoyancy characteristics.

[0003] During the inflation and use of the airship in the field, the volume of the capsule will expand to a certain extent, and the change of this expanded volume will affect the accurate evaluation and calculation of the total buoyancy, residual buoyancy, and aerial flight performance of the airship. There are few studies on airships in the prior art, which involve airbag volume monitoring, such as a device and method for monitoring the volume of an airship auxiliary airbag disclosed in CN112572756A, but there is a lack of research on the expansion volume of the capsule of the airship. Therefore, in order to meet the calculation and test of the relevant performance of the airship, it is necessary to accurately calculate and evaluate the expansion volume of the capsule of the airship, so as to guide the performance test and the correction of the performance calculation model. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to accurately calculate and evaluate the expansion amount of the bladder of the floating airship.

[0005] The present invention solves the above technical problems by the following technical means: A ground test and evaluation method for the expansion amount of a floating airship bladder, comprising:

[0006] Step A, preparing the airship for inflation and filling it with helium to obtain the remaining buoyancy weight of the airship;

[0007] Step B, obtaining the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag of the airship;

[0008] Step C, obtaining the atmospheric density, the density of the helium bag, the density of the front auxiliary airbag and the density of the rear auxiliary airbag;

[0009] Step D, obtaining the mass of the front auxiliary airbag according to the product of the volume of the front auxiliary airbag and the density of the front auxiliary airbag, and obtaining the mass of the rear auxiliary airbag according to the volume of the rear auxiliary airbag and the density of the rear auxiliary airbag;

[0010] Step E: The volume of the front auxiliary airbag and the volume of the rear auxiliary airbag are added and multiplied by the density of the helium bag as the minuend, and the difference is added to the residual buoyancy weight of the airship and the mass of the front auxiliary airbag. The result of the addition is used as the numerator, and the difference between the atmospheric density and the density of the helium bag is used as the denominator to obtain the actual volume of the airship airbag; the expansion amount of the airship airbag is obtained according to the ratio of the actual volume of the airship airbag to the theoretical volume of the airship design.

[0011] Further, the airship is prepared for inflation and filled with helium, including:

[0012] Before preparing for inflation, measure the ground atmospheric temperature and the purity of the helium to be filled, confirm that the main airbag of the airship has been evacuated, and then complete the helium filling of the airship.

[0013] Further, obtaining the remaining buoyancy weight of the airship includes:

[0014] An electronic scale is placed under the landing gear of the floating airship to weigh the weight of the airship system. The number of weighing measurements of the floating airship is selected to be no less than 3 times, and the average value is taken as the final residual buoyancy weight of the airship.

[0015] Further, step B comprises:

[0016] The height of the front laser rangefinder and the height of the rear laser rangefinder of the airship are obtained, and a polynomial between the volume and height of the airship is fitted based on theoretical data of the airship's capsule volume and height. The height of the front laser rangefinder and the height of the rear laser rangefinder are respectively substituted into the polynomial to obtain the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag.

[0017] Furthermore, the density of the atmosphere and the density of the helium bag are calculated as follows:

[0018] The atmospheric pressure collected is used as the numerator, and the product of the atmospheric temperature and the first temperature coefficient is used as the denominator to obtain the atmospheric density; the ground helium bag pressure collected is used as the numerator, and the product of the ground helium bag temperature and the second temperature coefficient is used as the denominator to obtain the density of the helium bag.

[0019] Furthermore, the calculation method of the front airbag density and the rear airbag density is the same, wherein the calculation method of the front airbag density is:

[0020] After the airship is inflated, the pressure of the front airbag on the ground P is collected in real time 前 and the ground front airbag temperature T 前 , the collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the first temperature coefficient is used as the denominator to obtain the front airbag air density ρ 前空 The collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the second temperature coefficient is used as the denominator to obtain the front airbag helium density ρ 前氦 , through the formula ρ 前 =ρ 前空 ×(1-η)+ρ 前氦 ×η, the density of the front airbag is obtained, and η is the purity of helium.

[0021] The present invention also provides a ground test and evaluation system for the expansion amount of a floating airship bladder, comprising:

[0022] The remaining buoyancy weight calculation module is used to prepare the airship for inflation and fill it with helium to obtain the remaining buoyancy weight of the airship;

[0023] A volume calculation module, used to obtain the volume of the front and rear auxiliary airbags of the airship;

[0024] Density calculation module, used to obtain the atmospheric density, the density of the helium bag, the density of the front auxiliary airbag and the density of the rear auxiliary airbag;

[0025] An airbag mass calculation module, used to obtain the mass of the front airbag according to the product of the volume of the front airbag and the density of the front airbag, and to obtain the mass of the rear airbag according to the volume of the rear airbag and the density of the rear airbag;

[0026] The module for calculating the expansion amount of the bladder is used to add the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag, multiply the sum of the sum of the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag by the density of the helium airbag as the minuend, add the difference to the residual buoyancy weight of the airship and the mass of the front auxiliary airbag, take the result of the addition as the numerator, and take the difference between the atmospheric density and the density of the helium airbag as the denominator to obtain the actual volume of the airship airbag; and obtain the expansion amount of the floating airship bladder according to the ratio of the actual volume of the airship airbag to the theoretical volume of the floating airship design.

[0027] Further, the airship is prepared for inflation and filled with helium, including:

[0028] Before preparing for inflation, measure the ground atmospheric temperature and the purity of the helium to be filled, confirm that the main airbag of the airship has been evacuated, and then complete the helium filling of the airship.

[0029] Further, obtaining the remaining buoyancy weight of the airship includes:

[0030] An electronic scale is placed under the landing gear of the floating airship to weigh the weight of the airship system. The number of weighing measurements of the floating airship is selected to be no less than 3 times, and the average value is taken as the final residual buoyancy weight of the airship.

[0031] Furthermore, the volume calculation module is also used for:

[0032] The height of the front laser rangefinder and the height of the rear laser rangefinder of the airship are obtained, and a polynomial between the volume and height of the airship is fitted based on theoretical data of the airship's capsule volume and height. The height of the front laser rangefinder and the height of the rear laser rangefinder are respectively substituted into the polynomial to obtain the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag.

[0033] Furthermore, the density of the atmosphere and the density of the helium bag are calculated as follows:

[0034] The atmospheric pressure collected is used as the numerator, and the product of the atmospheric temperature and the first temperature coefficient is used as the denominator to obtain the atmospheric density; the ground helium bag pressure collected is used as the numerator, and the product of the ground helium bag temperature and the second temperature coefficient is used as the denominator to obtain the density of the helium bag.

[0035] Furthermore, the calculation method of the front airbag density and the rear airbag density is the same, wherein the calculation method of the front airbag density is:

[0036] After the airship is inflated, the pressure of the front airbag on the ground P is collected in real time 前 and the ground front airbag temperature T 前 , the collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the first temperature coefficient is used as the denominator to obtain the front airbag air density ρ 前空 The collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the second temperature coefficient is used as the denominator to obtain the front airbag helium density ρ 前氦 , through the formula ρ 前 =ρ 前空 ×(1-η)+ρ 前氦 ×η, the density of the front airbag is obtained, and η is the purity of helium.

[0037] The advantages of the present invention are as follows: in view of the phenomenon that the volume of the airship bladder will have a certain amount of expansion during the first inflation of the airship in the outdoor field, a method for rapid evaluation of the ground test of the airship bladder expansion is proposed, which solves the problem of estimating the airship bladder expansion amount, accurately calculates and evaluates the airship bladder expansion amount, and provides a reference for the calculation and evaluation of the airship flight performance and outdoor tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The present invention is a flowchart of a method for ground testing and evaluating the expansion amount of a floating airship bladder disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1 As shown, Embodiment 1 of the present invention provides a method for ground testing and evaluating the expansion amount of a floating airship bladder, comprising the following steps:

[0042] S1. The ground test and evaluation method of the expansion volume of the airship is generally carried out after the first inflation of the airship is completed. Before the inflation, the ground atmospheric temperature, the purity of the helium to be filled, etc. are measured, and the vacuum of the main airbag of the airship is confirmed.

[0043] S2. Fill the floating airship with helium according to relevant operation requirements.

[0044] S3. Use an electronic scale placed under the landing gear of the floating airship to weigh the weight of the airship system (i.e., the remaining buoyancy) m. Considering the influence of factors such as inevitable measurement errors, the number of weighing measurements of the floating airship can generally be selected to be no less than 3 times, and the average value is taken as the final remaining buoyancy weight m of the airship.

[0045] S4. The height h of the front laser rangefinder of the airship can be obtained through the display and control software in the ground measurement and control vehicle. 前 , the height of the rear laser rangefinder h 后 .

[0046] S5. Based on the theoretical data of the capsule volume and height in the designed airship model, a polynomial formula between the capsule volume and height can be fitted. The specific formula is as follows: V = a 6 ×h 6 +a 5 ×h 5 +a 4 ×h 4 +a 3 ×h 3 +a 2 ×h 2 +a 1 ×h+a 0 . , where a 6 、a 5 、a 4 、a 3 、a 2 、a 1 、a 0 are the fitted polynomial coefficients.

[0047] S6. Combining the formula in S5 and the height in S4, the volume of the front airbag V can be obtained. 前 And the rear airbag volume Vrear.

[0048] S7, based on the atmospheric pressure P collected in real time after the airship is inflated 大气 and atmospheric temperature T 大气 , the atmospheric density can be calculated based on the formula

[0049] S8, based on the ground helium bag pressure P collected in real time after the airship is inflated 主 and the ground helium bag temperature T主 , the density of the helium bag can be calculated based on the formula

[0050] S9, based on the front airbag pressure P collected in real time after the airship is inflated 前 and the ground front airbag temperature T 前 , Therefore ρ 前 =ρ 前空 ×(1-η)+ρ 前氦 ×η, where ρ 前 is the density of the front airbag; ρ 前空 is the air density of the front airbag, ρ 前氦 is the helium density of the front auxiliary airbag, and η is the helium purity.

[0051] S10. Using a method similar to S9, the density of the rear airbag can be obtained, where ρ 后 =ρ 后空 ×(1-η)+ρ 后氦 ×η.

[0052] S11, combined with the front airbag volume V obtained in S6 前 and the volume of the rear airbag V 后 , the front airbag density ρ obtained in S9 前 , the rear airbag density ρ obtained in S10 后 , we can get the front airbag mass M 前 , rear airbag mass M 后 , where M 前 =V 前 ×ρ 前 、M 后 =V 后 ×ρ 后 ;

[0053] S12, therefore, combined with the remaining buoyancy weight m of the airship in S3 and the atmospheric density ρ in S7 大气 , the density of the helium bag in S8 主 、S11 front airbag gas mass M 前 and the mass of the rear airbag M 后 , we can get the actual volume V of the airship airbag 测 , where the specific formula is

[0054] S13, theoretical volume V combined with floating airship design 0 , the actual volume V of the airship airbag calculated in S12 测 , so the expansion amount c of the floating airship capsule can be calculated, and the specific formula is:

[0055] Through the above technical scheme, the present invention aims at the phenomenon that the volume of the bladder will expand to a certain extent during the first inflation of the airship in the outdoor field, and proposes a method for rapid evaluation of the ground test of the expansion amount of the airship bladder, so as to solve the problem of estimating the expansion amount of the airship bladder, accurately calculate and evaluate the expansion amount of the airship bladder, and provide a reference for the calculation and evaluation of the flight performance of the airship and the outdoor test.

[0056] Example 2

[0057] Based on Example 1, Example 2 of the present invention provides a ground test and evaluation system for the expansion amount of a floating airship bladder, comprising:

[0058] The remaining buoyancy weight calculation module is used to prepare the airship for inflation and fill it with helium to obtain the remaining buoyancy weight of the airship;

[0059] A volume calculation module, used to obtain the volume of the front and rear auxiliary airbags of the airship;

[0060] Density calculation module, used to obtain the atmospheric density, the density of the helium bag, the density of the front auxiliary airbag and the density of the rear auxiliary airbag;

[0061] An airbag mass calculation module, used to obtain the mass of the front airbag according to the product of the volume of the front airbag and the density of the front airbag, and to obtain the mass of the rear airbag according to the volume of the rear airbag and the density of the rear airbag;

[0062] The module for calculating the expansion amount of the bladder is used to add the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag, multiply the sum of the sum of the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag by the density of the helium airbag as the minuend, add the difference to the residual buoyancy weight of the airship and the mass of the front auxiliary airbag, take the result of the addition as the numerator, and take the difference between the atmospheric density and the density of the helium airbag as the denominator to obtain the actual volume of the airship airbag; and obtain the expansion amount of the floating airship bladder according to the ratio of the actual volume of the airship airbag to the theoretical volume of the floating airship design.

[0063] Specifically, the airship is prepared for inflation and filled with helium, including:

[0064] Before preparing for inflation, measure the ground atmospheric temperature and the purity of the helium to be filled, confirm that the main airbag of the airship has been evacuated, and then complete the helium filling of the airship.

[0065] Specifically, obtaining the remaining buoyancy weight of the airship includes:

[0066] An electronic scale is placed under the landing gear of the floating airship to weigh the weight of the airship system. The number of weighing measurements of the floating airship is selected to be no less than 3 times, and the average value is taken as the final residual buoyancy weight of the airship.

[0067] Specifically, the volume calculation module is also used for:

[0068] The height of the front laser rangefinder and the height of the rear laser rangefinder of the airship are obtained, and a polynomial between the volume and height of the airship is fitted based on theoretical data of the airship's capsule volume and height. The height of the front laser rangefinder and the height of the rear laser rangefinder are respectively substituted into the polynomial to obtain the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag.

[0069] Specifically, the calculation method of atmospheric density and helium bag density is:

[0070] The atmospheric pressure collected is used as the numerator, and the product of the atmospheric temperature and the first temperature coefficient is used as the denominator to obtain the atmospheric density; the ground helium bag pressure collected is used as the numerator, and the product of the ground helium bag temperature and the second temperature coefficient is used as the denominator to obtain the density of the helium bag.

[0071] Specifically, the calculation method of the front airbag density and the rear airbag density are the same, wherein the calculation method of the front airbag density is:

[0072] After the airship is inflated, the pressure of the front airbag on the ground P is collected in real time 前 and the ground front airbag temperature T 前 , the collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the first temperature coefficient is used as the denominator to obtain the front airbag air density ρ 前空 The collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the second temperature coefficient is used as the denominator to obtain the front airbag helium density ρ 前氦 , through the formula ρ 前 =ρ 前空 ×(1-η)+ρ 前氦 ×η, the density of the front airbag is obtained, and η is the purity of helium.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ground test and evaluation method for the expansion of a floating airship bladder, characterized in that: include: Step A, preparing the airship for inflation and filling it with helium to obtain the remaining buoyancy weight of the airship; Step B, obtaining the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag of the airship; Step C, obtaining the atmospheric density, the density of the helium bag, the density of the front auxiliary airbag and the density of the rear auxiliary airbag; Step D, obtaining the mass of the front auxiliary airbag according to the product of the volume of the front auxiliary airbag and the density of the front auxiliary airbag, and obtaining the mass of the rear auxiliary airbag according to the volume of the rear auxiliary airbag and the density of the rear auxiliary airbag; Step E: The volume of the front auxiliary airbag and the volume of the rear auxiliary airbag are added and multiplied by the density of the helium bag as the minuend, and the difference is added to the residual buoyancy weight of the airship and the mass of the front auxiliary airbag. The result of the addition is used as the numerator, and the difference between the atmospheric density and the density of the helium bag is used as the denominator to obtain the actual volume of the airship airbag; the expansion amount of the airship airbag is obtained according to the ratio of the actual volume of the airship airbag to the theoretical volume of the airship design.

2. A method for ground testing and evaluating the expansion of a floating airship bladder according to claim 1, characterized in that: Prepare the airship for inflation and fill it with helium, including: Before preparing for inflation, measure the ground atmospheric temperature and the purity of the helium to be filled, confirm that the main airbag of the airship has been evacuated, and then complete the helium filling of the airship.

3. A method for ground testing and evaluating the expansion of a floating airship bladder according to claim 1, characterized in that: Get the remaining buoyancy weight of the airship, including: An electronic scale is placed under the landing gear of the floating airship to weigh the weight of the airship system. The number of weighing measurements of the floating airship is selected to be no less than 3 times, and the average value is taken as the final residual buoyancy weight of the airship.

4. A method for ground testing and evaluating the expansion of a floating airship bladder according to claim 1, characterized in that: Step B includes: The height of the front laser rangefinder and the height of the rear laser rangefinder of the airship are obtained, and a polynomial between the volume and height of the airship is fitted based on theoretical data of the airship's capsule volume and height. The height of the front laser rangefinder and the height of the rear laser rangefinder are respectively substituted into the polynomial to obtain the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag.

5. The method for ground testing and evaluating the expansion of a floating airship bladder according to claim 1, characterized in that: The density of the atmosphere and the density of the helium bag are calculated as: The atmospheric pressure collected is used as the numerator, and the product of the atmospheric temperature and the first temperature coefficient is used as the denominator to obtain the atmospheric density; the ground helium bag pressure collected is used as the numerator, and the product of the ground helium bag temperature and the second temperature coefficient is used as the denominator to obtain the density of the helium bag.

6. A method for ground testing and evaluating the expansion of a floating airship bladder according to claim 1, characterized in that: The calculation method of the front airbag density and the rear airbag density is the same, and the calculation method of the front airbag density is: After the airship is inflated, the pressure of the front airbag on the ground P is collected in real time 前 and the ground front airbag temperature T 前 , the collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the first temperature coefficient is used as the denominator to obtain the front airbag air density ρ 前空 The collected front airbag pressure on the ground is used as the numerator, and the product of the front airbag temperature on the ground and the second temperature coefficient is used as the denominator to obtain the front airbag helium density ρ 前氦 , through the formula ρ 前 =ρ 前空 ×(1-η)+ρ 前氦 ×η, the density of the front airbag is obtained, and η is the purity of helium.

7. A ground test and evaluation system for the expansion of a floating airship, characterized in that: include: The remaining buoyancy weight calculation module is used to prepare the airship for inflation and fill it with helium to obtain the remaining buoyancy weight of the airship; A volume calculation module, used to obtain the volume of the front and rear auxiliary airbags of the airship; Density calculation module, used to obtain the atmospheric density, the density of the helium bag, the density of the front auxiliary airbag and the density of the rear auxiliary airbag; An airbag mass calculation module, used to obtain the mass of the front airbag according to the product of the volume of the front airbag and the density of the front airbag, and to obtain the mass of the rear airbag according to the volume of the rear airbag and the density of the rear airbag; The module for calculating the expansion amount of the bladder is used to add the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag, multiply the sum of the sum of the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag by the density of the helium airbag as the minuend, add the difference to the residual buoyancy weight of the airship and the mass of the front auxiliary airbag, take the result of the addition as the numerator, and take the difference between the atmospheric density and the density of the helium airbag as the denominator to obtain the actual volume of the airship airbag; and obtain the expansion amount of the floating airship bladder according to the ratio of the actual volume of the airship airbag to the theoretical volume of the floating airship design.

8. A ground test and evaluation system for the expansion of a floating airship bladder according to claim 7, characterized in that: Prepare the airship for inflation and fill it with helium, including: Before preparing for inflation, measure the ground atmospheric temperature and the purity of the helium to be filled, confirm that the main airbag of the airship has been evacuated, and then complete the helium filling of the airship.

9. A ground test and evaluation system for the expansion of a floating airship bladder according to claim 7, characterized in that: Get the remaining buoyancy weight of the airship, including: An electronic scale is placed under the landing gear of the floating airship to weigh the weight of the airship system. The number of weighing measurements of the floating airship is selected to be no less than 3 times, and the average value is taken as the final residual buoyancy weight of the airship.

10. A ground test and evaluation system for the expansion of a floating airship bladder according to claim 7, characterized in that: The volume calculation module is also used to: The height of the front laser rangefinder and the height of the rear laser rangefinder of the airship are obtained, and a polynomial between the volume and height of the airship is fitted based on theoretical data of the airship's capsule volume and height. The height of the front laser rangefinder and the height of the rear laser rangefinder are respectively substituted into the polynomial to obtain the volume of the front auxiliary airbag and the volume of the rear auxiliary airbag.

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