Method and device for acquiring flight end point of helicopter route

Abstract

The invention provides a method and device for acquiring a flight terminal point of a helicopter route, and the method comprises the steps: 1, obtaining wind speed and wind direction data according to a preset period and ground speed data and air speed data measured by a helicopter sensor at a current route segment; 2, according to the wind speed and wind direction data, the ground speed of the endurance period is corrected; and step 3, according to the corrected ground speed of the later endurance period and the distance of the later endurance period, obtaining the end point. The wind speed and the wind direction are calculated by using the ground speed and air speed data of the current flight segment, the calculated wind speed and wind direction values are applied to ground speed calculation of the later endurance segment, the calculated corrected ground speed value is used for replacing the current ground speed value to be used for flight time calculation of all the flight segments, and the calculation accuracy at the end point is improved.

Description

Technical Field

[0001] The present application belongs to the field of navigation system design, and more particularly to a method and device for obtaining the flight endpoint of a helicopter route. Background Art

[0002] With the development of helicopter positioning and navigation technology, helicopters now generally have regional navigation capabilities. The regional navigation function updates land-based or satellite-based navigation signals and uses the helicopter's navigation system for continuous positioning to achieve the ability to fly along any desired route. Helicopters no longer have to fly point-to-point along specific navigation stations. The route can be composed of a series of custom geographic coordinate points.

[0003] The terminal time is the estimated time when the helicopter arrives at the last waypoint when flying along a predetermined route. Accurate terminal time calculation is of great significance for helicopter flight route planning and subsequent mission impact assessment.

[0004] End point = (remaining distance of current segment / current ground speed) + (distance of subsequent segment / current ground speed)

[0005] The helicopter flies at a low speed, and the ground speed value is greatly affected by wind speed and direction. The error of using the current ground speed value to calculate the flight time of the subsequent flight segments is large, resulting in a large difference between the calculated terminal time and the actual arrival time. Therefore, a new terminal time calculation method is needed to enable pilots to accurately obtain the terminal time, effectively plan the flight route, and improve the efficiency of mission completion. Summary of the invention

[0006] The present invention proposes a method and device for obtaining the flight endpoint of a helicopter route, which uses the ground speed and airspeed data of the current flight segment to calculate the wind speed and direction, applies the calculated wind speed and direction values ​​to the ground speed calculation of subsequent flight segments, and uses the calculated corrected ground speed value to replace the current ground speed value for flight time calculation of each flight segment, thereby improving the accuracy of the calculation at the endpoint.

[0007] The present invention provides a method for obtaining the flight end point of a helicopter route, comprising:

[0008] Step 1: Obtain wind speed and direction data according to the preset cycle based on the ground speed data and air speed data measured by the helicopter sensor in the current flight segment;

[0009] Step 2: Correct the ground speed of the subsequent flight segment based on the wind speed and direction data;

[0010] Step 3: Obtain the end time based on the corrected ground speed of the subsequent segment and the distance of the subsequent segment.

[0011] Optionally, the ground speed of subsequent segments can be corrected based on wind speed and direction data, including:

[0012] Correct the ground speed of the subsequent segment based on the wind speed and direction data and the direction of the subsequent segment.

[0013] Optional, corrected ground speed for subsequent segments

[0014] Among them, Vt is the true airspeed value, Vw is the wind speed, α is the wind direction, and β is the direction of the subsequent segment.

[0015] Optional, the flight direction of the next leg

[0016] Among them, Bw, Cw are the latitudes of the waypoints in the next segment, and Bj, Cj are the longitudes of the waypoints in the next segment.

[0017] Optional, wind speed

[0018] is the ground speed of the current segment, It is the current airspeed data.

[0019] Optionally, the preset period is 30s.

[0020] The present invention also provides a device for obtaining the flight endpoint of a helicopter route, which is used to execute any of the methods described above.

[0021] The present invention also provides a computer program for executing any one of the methods described above.

[0022] Beneficial technical effects of this application:

[0023] The present invention proposes a method and device for obtaining the terminal time of a helicopter route flight. When calculating the navigation data in the helicopter cockpit, the terminal time calculation method proposed by the present invention is adopted, and the flight time calculation of the subsequent flight segment can be automatically corrected according to the current wind speed and direction data, thereby effectively improving the accuracy of the terminal time calculation, effectively planning the flight route, and improving the efficiency of task completion. The present invention is applicable to the calculation of terminal time data of all helicopter models and has universal applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the velocity vector triangle.

[0025] Figure 2 It is a flight route indication. DETAILED DESCRIPTION

[0026] 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 below in conjunction with the drawings in 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 making creative work are within the scope of protection of the present invention.

[0027] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] The specific contents of the technical solution provided by the present invention are introduced below in conjunction with the accompanying drawings.

[0030] See also Figure 1 , Figure 2 The present invention provides a method and device for obtaining the flight endpoint of a helicopter route.

[0031] The present invention provides a method for calculating the flight end point of a helicopter route, and the method steps are as follows:

[0032] The parameters are defined as follows:

[0033] Current segment ground speed Vg;

[0034] The ground speed correction values ​​for the subsequent segments are Vg1, Vg2, Vg3…

[0035] The current true airspeed value is Vt;

[0036] The current wind direction is α (direction of incoming wind);

[0037] The current wind speed is Vw;

[0038] The flight direction of the subsequent flight segment is β. For the first, second, and third subsequent flight segments, the flight directions are recorded as β1, β2, β3, etc.

[0039] The current flight distance is d0;

[0040] The subsequent flight distances are d1, d2, d3…

[0041] The longitude of the current position is Aj;

[0042] The subsequent waypoint positions and longitudes are Bj, Cj, Dj…

[0043] The current location latitude is Aw;

[0044] The latitudes of subsequent waypoint positions are Bw, Cw, Dw…

[0045] The current flight distance is d0;

[0046] The subsequent flight distances are d1, d2, d3…

[0047] Step 1: Calculate the wind speed and direction data based on the ground speed and air speed data measured by the helicopter sensor in the current flight segment.

[0048]

[0049] Step 2: Calculate the flight distance of the current segment.

[0050]

[0051] Step 3: Remaining flight time for the current segment.

[0052]

[0053] Step 4: Calculate the flight distance of the next flight segment.

[0054]

[0055] Step 5: Calculate the flight direction of the next leg.

[0056]

[0057] Step 6: Calculate the corrected ground speed for the next segment.

[0058] According to the velocity vector trigonometric relationship

[0059]

[0060] Step 7: Calculate the flight time of the next flight segment.

[0061]

[0062] Step 8: Repeat steps 4 to 7 to calculate the flight time t2, t3…tn of each subsequent flight segment.

[0063] Step 9: Calculate the end point.

[0064] End time = current time + t0 + t1 + t2 + ... + tn

[0065] Step 10: Calculate the mean wind speed and direction every 30 seconds, and use the mean to update the wind speed and direction involved in the solution, and continuously correct the ground speed vector of subsequent segments.

Claims

1. A method for obtaining the end point of a helicopter route, characterized in that: include: Step 1: Obtain wind speed and direction data according to the preset cycle based on the ground speed data and air speed data measured by the helicopter sensor in the current flight segment; Step 2: Correct the ground speed of the subsequent flight segment based on the wind speed and direction data; Step 3: Obtain the end time based on the corrected ground speed of the subsequent segment and the distance of the subsequent segment.

2. The method for calculating the flight end point of a helicopter route according to claim 1, characterized in that: According to the wind speed and direction data, the ground speed of the subsequent segment is corrected, including: Correct the ground speed of the subsequent segment based on the wind speed and direction data and the direction of the subsequent segment.

3. The calculation method of the helicopter route flight end point according to claim 2 is characterized in that: Corrected ground speed for subsequent segments Among them, Vt is the true airspeed value, Vw is the wind speed, α is the wind direction, and β is the direction of the subsequent segment.

4. The method for calculating the flight end point of a helicopter route according to claim 1, characterized in that: Flight direction of the next leg Among them, Bw, Cw are the latitudes of the waypoints in the next segment, and Bj, Cj are the longitudes of the waypoints in the next segment.

5. The method for calculating the flight end point of a helicopter route according to claim 1, characterized in that: Wind speed is the ground speed of the current segment, It is the current airspeed data.

6. The method for calculating the flight end point of a helicopter route according to claim 1, characterized in that: The default period is 30s.

7. A device for obtaining the terminal point of a helicopter route, characterized in that: Used to perform the method according to any one of claims 1 to 6.

8. A computer program, characterized in that Used to perform the method according to any one of claims 1 to 6.

Images