Method for detecting flap opening position of hovercraft cushion fan
By installing multiple position and angle sensors on the flaps of the hovercraft's cushioning fan, the flap position can be detected in real time, solving the problem of flap sensor fault diagnosis and ensuring the accuracy of flap movement and the safe navigation of the hovercraft.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUXI BRACH 703TH RES INST OF CHINA SHIPBUILDING IND CORP
- Filing Date
- 2023-10-18
- Publication Date
- 2026-06-12
AI Technical Summary
Existing technologies cannot quickly determine whether the flap position sensor of the hovercraft's lifting fan is malfunctioning, which affects the hovercraft's lifting attitude control and navigation safety.
By installing multiple position sensors at different flap opening positions and combining the flap angle values from the angle sensor, the working status of the position sensors is detected in real time, a fault alarm is output, and the flap opening position is determined based on the angle sensor.
It enables real-time fault detection of position sensors, facilitating timely replacement, ensuring accurate flap operation, and guaranteeing that the hovercraft reaches the predetermined lifting attitude and ensures safe navigation.
Smart Images
Figure CN117469188B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hovercraft technology, and in particular to a method for detecting the flap opening position of a hovercraft's lifting fan. Background Technology
[0002] When the hovercraft is in operation, the main engine powers a lift fan that continuously pressurizes the air. This high-pressure air enters the bottom of the hull through air ducts and chambers, forming a high-pressure air cushion at the bottom of the hovercraft due to the obstruction of the skirt. The upward thrust of this high-pressure air cushion lifts the hull. By changing the opening position of the flaps in the lift fan, the air intake of the lift fan can be changed, thereby altering the lift height of the hovercraft.
[0003] During flap operation, the control system primarily uses position sensors to determine whether the flaps have opened to the required position. If the position sensor output signal malfunctions, the control system may be unable to accurately determine the flap opening position, affecting the hovercraft's lift attitude control. Current technology lacks a method for quickly determining if the position sensor is faulty; judgment relies solely on the pilot's experience, often resulting in incomplete flap operation and impacting the hovercraft's lift attitude and navigation safety at high speeds. Summary of the Invention
[0004] In response to the aforementioned technical problem and requirement of being unable to quickly determine whether a position sensor has malfunctioned and thus effectively detect the flap angle, the applicant proposes a method for detecting the flap opening position of a hovercraft's cushion lift fan. The technical solution of this application is as follows:
[0005] During the process of controlling the flap movement of the hovercraft's lifting fan, the flap angle value of the angle sensor matched with the flap of the lifting fan and the output signal of multiple position sensors are collected. The multiple position sensors are installed at different opening positions of the flap, and the flap angle value is the deflection angle of the flap.
[0006] When it is determined that all position sensors are working normally based on the flap angle value of the angle sensor and the output signals of multiple position sensors, the flap is located at the opening position corresponding to the position sensor whose output signal is at an effective level, based on the output signals of each position sensor during flap operation.
[0007] When a position sensor malfunction is determined based on the flap angle value from the angle sensor and the output signals from multiple position sensors, a fault alarm is output, and the flap opening position is determined based on the flap angle value from the angle sensor during flap operation.
[0008] A further technical solution involves detecting whether a position sensor is malfunctioning based on the flap angle value from the angle sensor and the output signals from multiple position sensors, including for each position sensor:
[0009] When the flaps point towards the position sensor at the flap angle value and the position sensor's output signal is at an effective level, the position sensor is considered to be working normally.
[0010] When the flaps point towards the position sensor at the flap angle value and the position sensor's output signal is always invalid, the position sensor is determined to be faulty.
[0011] A further technical solution involves detecting whether the flap is pointing towards the position sensor at the flap angle value, including:
[0012] When the flap angle value is within the margin range τ of the deflection angle range corresponding to the position sensor, it is determined that the flap is pointing towards the position sensor at the flap angle value.
[0013] The deflection angle range corresponding to each position sensor covers the standard flap angle value of the position sensor, which is the deflection angle of the flap at the installation position of the position sensor.
[0014] A further technical solution is that the deflection angle range of the position sensor in the fully closed position is expressed as follows: The deflection angle range of the position sensor at the intermediate opening position is expressed as follows: The deflection angle range of the position sensor at the fully open position is expressed as This is the standard flap angle value of the position sensor in the fully closed position. It is the standard flap angle value of the position sensor at the middle opening position. This is the standard flap angle value of the position sensor at the fully open position. δ1 is the deviation angle corresponding to the position sensor at the fully closed position, δ2 is the deviation angle corresponding to the position sensor at the intermediate opening position, and δ3 is the deviation angle corresponding to the position sensor at the fully open position. Furthermore, the deviation angles of the position sensors installed at the fully open and fully closed positions are smaller than the deviation angles of the position sensors at the intermediate opening positions.
[0015] A further technical solution involves determining the flap opening position based on the flap angle value from the angle sensor, including:
[0016] When the flap is pointing towards the normally functioning position sensor at the flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor with an effective output signal level.
[0017] When the flap points to the faulty position sensor at the flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor whose deflection angle range covers the flap angle value.
[0018] A further technical solution is that the output fault alarm is used to indicate that a position sensor has malfunctioned and to indicate the installation location of the malfunctioning position sensor.
[0019] A further technical solution is that the deflection angle ranges of each position sensor do not overlap.
[0020] The beneficial technical effects of this application are:
[0021] This application discloses a flap angle detection method for a hovercraft lift fan. Based on the flap angle value detected by an angle sensor and the output signal of a position sensor, the method monitors the position sensors for faults. When all position sensors are functioning normally, the flap opening position is determined based on the output signal of the position sensors during flap operation. When a position sensor malfunctions, a fault alarm is output, and the flap opening position is determined based on the flap angle value from the angle sensor during flap operation. This application not only allows for real-time detection of position sensor malfunctions via angle sensors, facilitating timely replacement of faulty sensors, but also ensures accurate flap operation through a more reasonable flap opening detection method. This enables the hovercraft to achieve the predetermined lift attitude, ensuring the safety of the hovercraft during navigation.
[0022] This application also takes into account the flap accuracy requirements of the hovercraft's lifting fan, and combines the accuracy of the angle sensor and the position sensor to set a corresponding deflection angle range and margin error for each position sensor, thereby making a more reasonable fault diagnosis of the position sensor. Attached Figure Description
[0023] Figure 1 This is a schematic flowchart of a method for detecting the flap opening position of a hovercraft cushion lift fan in one embodiment of this application.
[0024] Figure 2 This is a schematic diagram of the specific process of the flap opening position detection method in one embodiment of this application. Detailed Implementation
[0025] The specific embodiments of this application will be further described below with reference to the accompanying drawings.
[0026] like Figure 1 As shown, the method for detecting the flap opening position of a hovercraft cushion lift fan according to this application includes:
[0027] During the process of controlling the flap movement of the hovercraft's lifting fan, the flap angle value of the angle sensor matched with the flap of the lifting fan and the output signal of multiple position sensors are collected. The multiple position sensors are installed at different opening positions of the flap, and the flap angle value is the deflection angle of the flap.
[0028] When it is determined that all position sensors are working normally based on the flap angle value of the angle sensor and the output signals of multiple position sensors, the flap is located at the opening position corresponding to the position sensor whose output signal is at an effective level, based on the output signals of each position sensor during flap operation.
[0029] When a position sensor malfunction is determined based on the flap angle value from the angle sensor and the output signals from multiple position sensors, a fault alarm is output, and the flap opening position is determined based on the flap angle value from the angle sensor during flap operation.
[0030] This solution not only allows for real-time detection of position sensor malfunctions using an angle sensor, facilitating timely replacement of faulty sensors, but also ensures accurate flap movement through a more reasonable flap opening detection method. This enables the hovercraft to achieve the predetermined lifting attitude, guaranteeing its safety during navigation.
[0031] To more clearly illustrate the flap angle detection method of the hovercraft cushion lift fan of this application, another embodiment of this application will be described in detail below with reference to the accompanying drawings.
[0032] like Figure 2 As shown, during the process of controlling the flap movement of the hovercraft's lifting fan, the flap angle value of the angle sensor matched with the flap of the lifting fan and the output signal of multiple position sensors are collected. The multiple position sensors are installed at different opening positions of the flap, and the flap angle value is the deflection angle of the flap.
[0033] In this embodiment, the deflection angle of the flap at each position sensor's mounting location is used as the standard flap angle value for that position sensor. Since existing position sensors have a limited sensing range for flap recognition, and angle sensors are susceptible to interference from various factors, each position sensor is configured with a deflection angle range; the deflection angle range corresponding to each position sensor covers its standard flap angle value.
[0034] The flaps of the hovercraft are equipped with at least two position sensors, located at the fully open and fully closed positions respectively. Optionally, when three or more position sensors are used, the standard flap angle values corresponding to each position sensor should be distributed as widely as possible. The standard flap angle values can be distributed in an arithmetic progression or determined according to the actual needs of the hovercraft.
[0035] Optionally, the standard flap angle value is the endpoint or midpoint of the corresponding deflection angle range. In this embodiment, the deflection angle range of the position sensor in the fully closed position is expressed as... The deflection angle range of the position sensor at the intermediate opening position is expressed as follows: The deflection angle range of the position sensor at the fully open position is expressed as This is the standard flap angle value of the position sensor in the fully closed position. It is the standard flap angle value of the position sensor at the middle opening position. This is the standard flap angle value of the position sensor at the fully open position. δ1 is the deviation angle corresponding to the position sensor at the fully closed position, δ2 is the deviation angle corresponding to the position sensor at the intermediate opening position, and δ3 is the deviation angle corresponding to the position sensor at the fully open position. The endpoint values can be optionally determined based on actual accuracy requirements. Whether it is included within the deflection angle range.
[0036] Optionally, the deflection angle ranges of the various position sensors do not overlap. This avoids situations where multiple position sensors simultaneously output valid levels, making it impossible to determine the flap opening position.
[0037] Optionally, the deviation angle of the position sensor installed at the fully open and fully closed positions is smaller than the deviation angle of the position sensor at other opening positions. This is because these two positions correspond to the maximum and minimum angle ranges of the flap, and the accuracy requirements are higher when the flap is in these two positions.
[0038] Optionally, the position sensor is a proximity switch. When the flap approaches the position sensor, a normally functioning position sensor will output a valid level. Therefore, in this embodiment, the presence of a position sensor malfunction is detected based on the flap angle value from the angle sensor and the output signals from multiple position sensors, including for each position sensor:
[0039] (1) When the flap points to a position sensor at the flap angle value and the output signal of the position sensor is at an effective level, it is determined that the position sensor is working normally.
[0040] (2) When the flap points to a position sensor at the flap angle value and the output signal of the position sensor is always invalid, it is determined that the position sensor is faulty.
[0041] Specifically, when the flap angle value is within the margin range of the deflection angle range corresponding to a certain position sensor, it is determined that the flap is pointing towards the position sensor at that flap angle value. The margin range τ represents a set margin value τ added to both ends of the original deflection angle range. For example, when the deflection angle range is expressed as... When, the margin range is expressed as
[0042] During the navigation of hovercraft, the angle sensor is easily affected by various factors and may deviate. Therefore, the position sensor is needed to accurately identify whether the flap has reached the target opening position. The angle sensor is only used to detect whether the flap has reached the target opening position when the position sensor fails and cannot detect the flap opening position.
[0043] Therefore, in this embodiment, after determining whether a position sensor malfunctions, the method for selecting the corresponding flap opening position includes:
[0044] (1) When it is determined that all position sensors are working normally based on the flap angle value of the angle sensor and the output signals of multiple position sensors, the flap is located at the opening position corresponding to the position sensor whose output signal is effective during the flap operation.
[0045] (2) When it is determined that there is a fault in the position sensor based on the flap angle value of the angle sensor and the output signals of multiple position sensors, a fault alarm is output and the flap opening position is determined based on the flap angle value of the angle sensor during flap operation.
[0046] Determining the flap opening position based on the flap angle value from the angle sensor includes:
[0047] When the flap points to the position sensor that is working normally at a certain flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor whose output signal is at an effective level.
[0048] When the flap points to the malfunctioning position sensor at a certain flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor whose deflection angle range covers that flap angle value.
[0049] Optionally, the output fault alarm is used to indicate the presence of a faulty position sensor and to indicate the installation location of the faulty position sensor. The fault alarm can be any one or more of sound or light emission, used to prompt personnel to replace the faulty position sensor in a timely manner.
[0050] In another embodiment, when it is determined that a position sensor has malfunctioned, determining the flap opening position based on the flap angle value of the angle sensor includes: when the flap is pointing at any position sensor at a certain flap angle value, determining that the flap is located at the opening position corresponding to the position sensor whose deflection angle range covers the flap angle value.
[0051] To more clearly illustrate the flap angle detection method of the hovercraft cushion lift fan of this application, another embodiment will be described in detail below.
[0052] In this embodiment, the flaps of the lifting fan are equipped with three position sensors. The first position sensor is located in the fully closed position of the flaps, and the corresponding standard flap angle value is... The margin value is τ1; the second position sensor is located in the half-open position of the flap, and the corresponding standard flap angle value is... The margin value is τ2; the third position sensor is located in the fully open position of the flap, and the corresponding standard flap angle value is... The margin value is τ3. Wherein, and All are within the angular range of the flaps.
[0053] Set the deflection angle range and margin range for each position sensor. For example, the deflection angle range of the first position sensor is set to... The corresponding margin range is set to The deflection angle range of the second position sensor is set to The corresponding margin range is set to The deflection angle range of the third position sensor is set to The corresponding margin range is set to For example, δ1 = 1.0°, δ2 = 1.5°, δ3 = 1.0°, τ1 = τ2 = τ3 = 0.5°.
[0054] In actual operation, when the flap deflects from the fully closed position to the half-open position, the flap angle value changes from... to When the output signal of the second position sensor is always invalid, or when the flap deflects from the fully open position to the half-open position and the flap angle value changes from... to If the output signal of the second position sensor is always at an invalid level, it is determined that the second position sensor is faulty.
[0055] When the flap deflects from the half-open position to the fully closed position, the flap angle value from to If the output signal of the first position sensor is always at an invalid level, it is determined that the first position sensor is faulty.
[0056] When the flap deflects from the half-open position to the fully open position, the flap angle value from to If the output signal of the third position sensor is always at an invalid level, it is determined that the third position sensor is faulty.
[0057] In this embodiment, when no position sensor malfunction is detected, the flap is determined to be at the opening position corresponding to the position sensor whose output signal is at an effective level, based on the output signals of the three position sensors. If a position sensor malfunction is detected during the hovercraft's voyage, for example, if the second position sensor malfunctions, a malfunction alarm is output indicating that the second position sensor is faulty. In this case, the method for determining the flap opening position is as follows:
[0058] When the flap points to either the normally functioning first or second position sensor at a certain flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor whose output signal is at an effective level. When the flap points to the malfunctioning second position sensor at a certain flap angle value, it is determined that the flap is located at the opening position corresponding to the second position sensor whose deflection angle range covers that flap angle value, i.e., the flap angle value is within... When within the range, determine that the flap is located at the opening position corresponding to the second position sensor.
[0059] In another embodiment, when a second position sensor is determined to be faulty, determining the flap's opening position based on the flap angle value of the angle sensor includes: when the flap is pointing at any position sensor at a certain flap angle value, determining that the flap is located at the opening position corresponding to the position sensor whose deflection angle range covers that flap angle value. For example, when the flap is pointing at the first position sensor at a certain flap angle value, and that flap angle value is located at... When the flap is within the range, it is determined that the flap is located at the opening position corresponding to the first position sensor; when the flap points to the second position sensor at a certain flap angle value, and that flap angle value is within the range... When the flap is within the range, it is determined that the flap is located at the opening position corresponding to the second position sensor; when the flap points to the third position sensor at a certain flap angle value, and that flap angle value is within the range... When within the range, determine that the flap is located at the opening position corresponding to the third position sensor.
[0060] The above descriptions are merely preferred embodiments of this application, and this application is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of this application should be considered to be included within the protection scope of this application.
Claims
1. A method for detecting the flap opening position of a hovercraft cushion lift fan, characterized in that, The flap opening position detection method includes: During the process of controlling the flap movement of the hovercraft's lifting fan, the flap angle value of the angle sensor matched with the flap of the lifting fan and the output signal of multiple position sensors are collected. The multiple position sensors are respectively installed at different opening positions of the flap, and the flap angle value is the deflection angle of the flap. When it is determined that all position sensors are working normally based on the flap angle value of the angle sensor and the output signals of multiple position sensors, during the flap operation, the flap is located at the opening position corresponding to the position sensor whose output signal is at an effective level, based on the output signals of each position sensor. When a position sensor malfunction is determined based on the flap angle value of the angle sensor and the output signals of multiple position sensors, a fault alarm is output, and the flap opening position is determined based on the flap angle value of the angle sensor during flap operation. The system detects whether a position sensor is malfunctioning based on the flap angle value from the angle sensor and the output signals from multiple position sensors. This includes, for each position sensor, detecting whether the flap angle value falls within the margin range of the deflection angle corresponding to that position sensor. When the flap is pointed at the position sensor at the flap angle value, it is determined that the position sensor is working normally. When the flap is pointed at the position sensor at the flap angle value and the output signal of the position sensor is at an active level, it is determined that the position sensor is malfunctioning. When the flap is pointed at the position sensor at the flap angle value and the output signal of the position sensor is always at an inactive level, it is determined that the position sensor is faulty. The deflection angle range corresponding to each position sensor covers the standard flap angle value of the position sensor, where the standard flap angle value is the deflection angle of the flap at the installation position of the position sensor. The deflection angle range of the position sensor in the fully closed position is expressed as follows: The deflection angle range of the position sensor at the intermediate opening position is expressed as: The deflection angle range of the position sensor at the fully open position is expressed as: , This is the standard flap angle value of the position sensor at the fully closed position. It is the standard flap angle value of the position sensor at the intermediate opening position. It is the standard flap angle value of the position sensor at the fully open position. ; It is the deviation angle corresponding to the position sensor at the fully closed position. It is the deviation angle corresponding to the position sensor at the intermediate opening position. It is the deviation angle corresponding to the position sensor at the fully open position; and the deviation angles corresponding to the position sensors at the fully open and fully closed positions are smaller than the deviation angles corresponding to the position sensor at the intermediate opening position.
2. The flap opening position detection method according to claim 1, characterized in that, Determining the flap opening position based on the flap angle value from the angle sensor includes: When the flap points to the normally operating position sensor at the flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor whose output signal is at an effective level. When the flap points to the faulty position sensor at the flap angle value, it is determined that the flap is located at the opening position corresponding to the position sensor whose deflection angle range covers the flap angle value.
3. The flap opening position detection method according to claim 1, characterized in that, The output fault alarm is used to indicate the presence of a faulty position sensor and to indicate the installation location of the faulty position sensor.
4. The flap opening position detection method according to claim 1, characterized in that, The deflection angle ranges of the various position sensors do not overlap.