Flight drive system, fault detection method thereof and computer readable storage medium

Abstract

The application discloses a flight driving system, a fault detection method thereof and a computer readable storage medium. The method comprises the following steps: if a short circuit fault is detected in the flight driving system, a first isolation device is controlled to be disconnected to determine a target lift driving group in which the short circuit fault exists; a second isolation device and a third isolation device are controlled to be disconnected or connected to determine a target lift driving unit in which the short circuit fault exists in the target lift driving group, and the target lift driving unit is isolated. The application accurately determines the fault position in the flight driving system.

Description

Technical Field

[0001] This invention relates to the field of flying vehicle technology, and in particular to flight drive systems, fault detection methods thereon, and computer-readable storage media. Background Technology

[0002] Flight propulsion systems typically employ a multi-system redundancy high-voltage architecture. This architecture includes multiple power supply units and multiple lift drive units. The flight propulsion system typically consists of two or more lift drive units connected in parallel to a single battery for centralized power supply, reducing the number of power supply units. Single-point failures can occur in flight propulsion systems. For example, a short circuit in a power supply circuit can cause the entire flight propulsion system to lose power. If the fault point is not accurately identified, multiple lift drive units and power supply units may become inoperable, leading to a safety accident. Summary of the Invention

[0003] The main objective of this invention is to provide a flight drive system, a fault detection method thereof, and a computer-readable storage medium, aiming to solve the problem of how to improve the accuracy of flight drive fault detection.

[0004] To achieve the above objectives, the present invention provides a flight drive system, the flight drive system comprising:

[0005] At least two power supply units;

[0006] At least two sets of lift drive groups are connected in parallel and then connected to the power supply unit. Each lift drive group includes multiple lift drive units.

[0007] A first isolation device is disposed on the line between adjacent lift drive groups;

[0008] A second isolation device is disposed on the line between at least two adjacent lift drive units in each lift drive group;

[0009] A third isolation device is provided at least on the line between two adjacent lift drive units in each lift drive group, excluding the second isolation device.

[0010] Optionally, the second isolation device is disposed on the line between two adjacent lift drive units located in the middle of each lift drive group.

[0011] Optionally, the second isolation device is disposed on the line of the middle lift drive unit in each of the lift drive groups, near the power supply unit.

[0012] Optionally, the third isolation device is connected in parallel with the second isolation device on the line between two adjacent lift drive units.

[0013] Optionally, the initial state of the second isolation device is the open state, and the initial state of the third isolation device, which is connected in parallel with the second isolation device, is the closed state.

[0014] To achieve the above objectives, the present invention provides a flight drive fault detection method, which includes the following steps:

[0015] If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to disconnect in order to identify the target lift drive group with the short circuit fault.

[0016] The second and third isolation devices are controlled to open or close to identify a target lift drive unit with a short-circuit fault in the target lift drive group and to isolate the target lift drive unit.

[0017] Optionally, after the step of controlling the opening or closing of the second and third isolation devices, the method further includes:

[0018] Control the closure of the first isolation device and / or the second isolation device so that the remaining lift drive units other than the target lift drive unit can continue to operate.

[0019] Optionally, when the lift drive assembly includes the second isolation device and the third isolation device connected in parallel, and the second isolation device is in an open state, the step of controlling the opening or closing of the second isolation device and the third isolation device includes:

[0020] The third isolation device, which is connected in parallel with the second isolation device in the target lift drive group, is disconnected to divide the target lift drive group into two groups of lift drive groups to be screened.

[0021] If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes only one lift drive unit, then the lift drive unit is determined to be the target lift drive unit.

[0022] If a short circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, the third isolation device in the lift drive group to be screened with the short circuit fault is controlled to disconnect, so as to identify the target lift drive unit with the short circuit fault and isolate the target lift drive unit.

[0023] The steps of controlling the closure of the first isolation device and / or the second isolation device include:

[0024] The first isolation device is closed to reconnect the lift drive group to be screened, which is not connected to the power supply unit, to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

[0025] Optionally, after the step of disconnecting the third isolation device on the line between two adjacent lift drive units located in the middle of the target lift drive group, the method further includes:

[0026] If there is no short circuit fault in the lift drive group to be screened connected to the power supply unit, then the third isolation device in the other lift drive group to be screened is disconnected.

[0027] The steps of controlling the closure of the first isolation device and / or the second isolation device include:

[0028] The second isolation device between the lift drive groups to be screened is closed so that the remaining lift drive units other than the target lift drive unit can continue to operate.

[0029] Optionally, in each of the lifting drive groups, only the second isolation device is provided on the line between two adjacent lifting drive units located in the middle, or the second isolation device is provided on the line of the lifting drive unit located in the middle of each lifting drive group near the power supply unit. The step of controlling the opening or closing of the second isolation device and the third isolation device includes:

[0030] The second isolation device in the target lift drive group is disconnected to divide the target lift drive group into two groups of lift drive groups to be screened.

[0031] If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes only one lift drive unit, then the lift drive unit is determined to be the target lift drive unit.

[0032] If a short circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, then the third isolation device in the lift drive group to be screened with the short circuit fault is disconnected to identify the target lift drive unit with the short circuit fault and isolate the target lift drive unit.

[0033] The steps of controlling the closure of the first isolation device and / or the second isolation device include:

[0034] The first isolation device is closed to reconnect the lift drive group to be screened, which is not connected to the power supply unit, to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

[0035] Optionally, after the step of disconnecting the second isolation device in the target lift drive group, the method further includes:

[0036] If there is no short circuit fault in the lift drive group to be screened connected to the power supply unit, then the corresponding third isolation device in the other lift drive group to be screened is disconnected.

[0037] The steps of controlling the closure of the first isolation device and / or the second isolation device include:

[0038] The second isolation device between the lift drive groups to be screened is closed so that the remaining lift drive units other than the target lift drive unit can continue to operate.

[0039] Optionally, after the step of disconnecting the third isolation device in the lift drive group to be screened due to a short-circuit fault, the method further includes:

[0040] If a short circuit fault occurs in the lift drive unit connected to the power supply unit, then the lift drive unit connected to the power supply unit is determined to be the target lift drive unit;

[0041] The steps of controlling the closure of the first isolation device and / or the second isolation device include:

[0042] The second isolation device is closed to reconnect the lift drive unit that is not connected to the power supply unit to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

[0043] Optionally, after the step of disconnecting the third isolation device in the lift drive group to be screened due to a short-circuit fault, the method further includes:

[0044] If the lift drive unit connected to the power supply unit does not have a short circuit fault, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit.

[0045] Optionally, after the step of controlling the closure of the second isolation device between the lift drive groups to be screened, the method further includes:

[0046] If a short circuit fault occurs in the lift drive unit connected to the power supply unit, then the lift drive unit with a second isolation device installed on the line of another lift drive group to be screened is identified as the target lift drive unit.

[0047] The steps of controlling the closure of the first isolation device and / or the second isolation device include:

[0048] The first isolation device is closed to reconnect the lift drive unit that is not connected to the power supply unit to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

[0049] Optionally, after the step of controlling the closure of the second isolation device between the lift drive groups to be screened, the method further includes:

[0050] If the lift drive unit connected to the power supply unit does not have a short circuit fault, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit.

[0051] To achieve the above objectives, the present invention also provides a flight drive system, the flight drive system including a memory, a processor, and a flight drive fault detection program stored in the memory and executable on the processor, wherein when the flight drive fault detection program is executed by the processor, it implements the various steps of the flight drive fault detection method as described above.

[0052] To achieve the above objectives, the present invention also provides a computer-readable storage medium storing a flight drive fault detection program, which, when executed by a processor, implements the various steps of the flight drive fault detection method as described above.

[0053] This invention provides a flight drive system, its fault detection method, and a computer-readable storage medium. If a short-circuit fault is detected in the flight drive system, the system controls a first isolation device to disconnect to identify the target lift drive group with the short-circuit fault. It then controls the opening or closing of a second and third isolation device to identify the target lift drive unit with the short-circuit fault within the target lift drive group and isolates the target lift drive unit. By identifying the target lift drive unit with the short-circuit fault within the target lift drive group, the fault location is accurately determined, and the short-circuited lift drive unit is isolated, ensuring the normal operation of the flight drive system. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the flight drive system in this invention;

[0055] Figure 2 This is a schematic diagram of the flight drive system in this invention;

[0056] Figure 3 This is a schematic diagram of the flight drive system in this invention;

[0057] Figure 4 This is a schematic diagram of the flight drive system in this invention;

[0058] Figure 5 This is a schematic diagram of the flight drive system in this invention;

[0059] Figure 6 This is a schematic diagram of the flight drive system in this invention;

[0060] Figure 7 This is a schematic diagram of the hardware structure of the flight drive system according to an embodiment of the present invention;

[0061] Figure 8 This is a flowchart illustrating the first embodiment of the flight drive fault detection method of the present invention;

[0062] Figure 9 This is a schematic diagram of the flight drive system in this invention;

[0063] Figure 10 This is a flowchart illustrating a second embodiment of the flight drive fault detection method of the present invention;

[0064] Figure 11 This is a schematic diagram of the flight drive system in this invention;

[0065] Figure 12 This is a schematic diagram of the flight drive system in this invention;

[0066] Figure 13 This is a schematic diagram of the flight drive system in this invention;

[0067] Figure 14 This is a schematic diagram of the flight drive system in this invention;

[0068] Figure 15 This is a schematic diagram of the flight drive system in this invention;

[0069] Figure 16 This is a detailed flowchart of step S21 of the fourth embodiment of the flight drive fault detection method of the present invention.

[0070] Figure 17 This is a schematic diagram of the flight drive system in this invention;

[0071] Figure 18 This is a schematic diagram of the flight drive system in this invention;

[0072] Figure 19 This is a schematic diagram of the flight drive system in this invention;

[0073] Figure 20 This is a schematic diagram of the flight drive system in this invention;

[0074] Figure 21 This is a schematic diagram of the flight drive system in this invention.

[0075] Explanation of icon numbers:

[0076] 101 Power supply unit 201 Lift electric drive unit 301 First isolation device 302 Second isolation device 303 Third isolation device 401 Distribution copper busbar

[0077] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0078] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0079] The main solution of this invention is as follows: if a short circuit fault is detected in the flight drive system, the first isolation device is controlled to disconnect to identify the target lift drive group with the short circuit fault; the second and third isolation devices are controlled to open or close to identify the target lift drive unit with the short circuit fault in the target lift drive group and isolate the target lift drive unit.

[0080] By identifying the target lift drive unit with a short circuit fault in the target lift drive group, the fault location was accurately determined, and the short-circuited lift drive unit was isolated, ensuring the normal operation of the flight drive system.

[0081] Reference Figure 1 or Figure 2 The present invention provides a flight drive system, the flight drive system comprising:

[0082] At least two power supply units 101;

[0083] At least two sets of lift drive groups, and multiple sets of the lift drive groups are connected in parallel and connected to the power supply unit 101. The lift drive group includes multiple lift drive units 201.

[0084] A first isolation device 301 is disposed on the line between adjacent lift drive groups;

[0085] The second isolation device 302 is disposed on the line between at least two adjacent lift drive units 201 in each lift drive group;

[0086] The third isolation device 303 is provided at least on the line between two adjacent lift drive units 201 in each lift drive group, excluding the second isolation device.

[0087] Optionally, the power supply unit 101 provides power to each lift drive unit 201. Optionally, the power supply unit 101 is a battery or power cabinet, etc. Figure 5 and Figure 6 As shown, the power supply unit 101 is equipped with a fuse and a BMS (Battery Management System). For short-circuit faults in the power supply circuit and the power supply line of the lift drive unit 1, the fuse inside the power supply unit 101 can effectively isolate the short circuit and prevent its continued occurrence. The BMS inside the power supply unit 101 detects the presence of short-circuit current in real time and can effectively drive the first isolation device 301, the second isolation device 302, and the third isolation device 303 to perform protective actions. For example, as... Figure 3 or Figure 4 As shown, the two power supply units 101 respectively drive the first isolation device 301, the second isolation device 302 and the third isolation device 303 to perform the safety operation.

[0088] Optionally, the lift drive unit 201 can be a motor or other types of load.

[0089] Optionally, the lifting drive groups are connected in parallel and then connected to the power supply unit 101. Each lifting drive group includes multiple lifting drive units 201. For example, two power supply units 101 and two lifting drive groups are used, but the number of power supply units 101 and lifting drive groups is not limited to two. Figure 1 or Figure 2 As shown, the lift drive group 1 includes lift drive units 201a, 201b, 201c and 201d; the lift drive group 2 includes lift drive units 201e, 201f, 201g and 201h. The lift drive group 1 and the lift drive group 2 are connected in parallel and then connected to the power supply unit 101.

[0090] Optionally, both the first isolation device 301 and the second isolation device 302 can be SSPCs (Solid-State Power Controllers). The SSPC is bidirectional, capable of quickly cutting off short-circuit current within 30µs, and can detect the direction of the short-circuit current, driving the third isolation device 303 to trip based on the current direction. The SSPC has a reconfiguration function; when the SSPC recloses to detect a short-circuit fault, it uses the inductance of the power supply line to pre-charge the lift drive unit, preventing high current damage to the device caused by connecting the power supply unit 101 to a capacitive load. Using the solid-state power controller and line inductance to pre-charge the lift drive unit improves the safety of reconnecting the lift drive unit; the solid-state power controller quickly controls the third isolation device (intelligent active fuse) to disconnect based on the direction of the short-circuit current, reducing fault identification time.

[0091] Optionally, such as Figure 5 and Figure 6 As shown, the third isolation device 303 can be an intelligent active fuse. The fuse can effectively receive control from the power supply unit 101BMS or SSPC to actively disconnect large short-circuit currents. The disconnection time of this intelligent active fuse is much shorter than the thermal melting time of a traditional passive fuse, effectively reducing fault isolation time and power distribution system reconfiguration time.

[0092] Optionally, the first isolation device 301 is disposed on the line between adjacent lift drive groups. When the first isolation device 301 is disconnected, the line between adjacent lift drive groups is disconnected. For example, as shown... Figure 1 or Figure 2 As shown, the first isolation device 301 is located between the lift drive group 1 and the lift drive group 2. When the first isolation device 301 is disconnected, the lift drive group 1 is connected to the power supply unit 101a, and the lift drive group 2 is connected to the power supply unit 101b.

[0093] Optionally, the second isolation device 302 is disposed on the line between at least two adjacent lift drive units 201 in each lift drive group. Optionally, the second isolation device 302 is disposed on the line between two adjacent middle lift drive units 201 in each lift drive group. When each lift drive group includes an even number of lift drive units, for example, a lift drive group includes 4 lift drive units, the second isolation device 302 in each lift drive group is disposed on the line between two middle adjacent lift drive units 201, for example, as shown in... Figure 1 or Figure 2As shown, in lift drive group 1, the second isolation device 302 is installed on the line between lift drive unit 201b and lift drive unit 201c, and in lift drive group 2, the second isolation device 302 is installed on the line between lift drive unit 201f and lift drive unit 201g.

[0094] Optionally, the second isolation device 302 is disposed on the line of the middle lift drive unit 201 in each lift drive group, near the power supply unit 101. When each lift drive group includes an odd number of lift drive units, for example, a lift drive group includes 3 lift drive units, the second isolation device 302 in each lift drive group is disposed on the line of the middle lift drive unit 201, near the power supply unit 101. For example, as shown in... Figure 3 or Figure 4 As shown, in the lift drive group 1, the second isolation device 302 is installed on the line between the lift drive unit 201a and the lift drive unit 201b, and in the lift drive group 2, the second isolation device 302 is installed on the line between the lift drive unit 201g and the lift drive unit 201h.

[0095] Optionally, the third isolation device 303 is disposed on the line between any two adjacent lift drive units 201 in each lift drive group, excluding the second isolation device 302, such as... Figure 2 or Figure 4 As shown, one of a second isolation device 302 or a third isolation device 303 is provided on the line between each lift drive group. When the second isolation device 302 is disconnected, the lift drive group is divided into two parts. For example, as shown... Figure 1 As shown, a second isolation device 302 is provided between the lift drive unit 201b and the lift drive unit 201c. When the second isolation device 302 in the lift drive group 1 is disconnected, the lift drive group 1 is divided into two parts: one part consists of lift drive units 201a and 201b, and the other part consists of lift drive units 201c and 201d. Figure 2 As shown, in the lift drive group 1, a third isolation device 303a is provided between lift drive unit 201a and lift drive unit 201b, and a third isolation device 303c is provided between lift drive unit 201c and lift drive unit 201d. When the third isolation device 303a is disconnected, the line between lift drive unit 201a and lift drive unit 201b is disconnected, and when the third isolation device 303c is disconnected, the line between lift drive unit 201c and lift drive unit 201d is disconnected.

[0096] Optionally, the third isolation device 303 and the second isolation device 302 are connected in parallel on the line between two adjacent lift drive units 201. For example, as shown... Figure 1 As shown, the third isolation device 303b is disposed between the lift drive unit 201b and the lift drive unit 201c. The second isolation device 302a and the third isolation device 303b are connected in parallel and then connected between the lift drive unit 201b and the lift drive unit 201c.

[0097] Optionally, the second isolation device 302 on the line between two adjacent lift drive units 201 located in the middle position of each lift drive group is initially in an open state, and the third isolation device 303 is initially in a closed state. For example, as shown... Figure 1 As shown, the initial state of the second isolation device 302a is the open state, and the initial state of the third isolation device 303b is the closed state.

[0098] Optionally, the lift drive units 201 located at the edge are directly connected to the power supply unit 101. For example, such as... Figure 1 or Figure 2 As shown, the lift drive unit 201a is directly connected to the power supply unit 101, and the lift drive unit 201h is also directly connected to the power supply unit 101.

[0099] Optionally, a power distribution copper busbar 401 is provided between the power supply unit 101 and the lift drive unit.

[0100] In the technical solution of this embodiment, by setting a first isolation device 301, a second isolation device 302 and a third isolation device 303, when a short circuit fault occurs in the flight drive system, the fault point is determined by each isolation device, that is, the flight drive system where the short circuit fault occurs, and the lift drive system where the short circuit fault occurs is isolated to ensure the normal operation of the flight drive system.

[0101] As one implementation scheme, the flight propulsion system can be as follows: Figure 7 As shown.

[0102] The embodiments of the present invention relate to a flight drive system, which includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to enable communication between these components.

[0103] Memory 102 can be high-speed RAM or stable memory (non-volatile memory), such as disk storage. Figure 7 As shown, the memory 102, which is a computer-readable storage medium, may include a flight drive fault detection program; and the processor 101 may be used to call the flight drive fault detection program stored in the memory 102 and perform related operations of the following flight drive fault detection method.

[0104] Based on the hardware architecture and structure of the flight drive system described above, an embodiment of the flight drive fault detection method of the present invention is proposed.

[0105] Reference Figure 8 , Figure 8 This is a first embodiment of the flight drive fault detection method of the present invention, which includes the following steps:

[0106] Step S10: If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to disconnect to identify the target lift drive group with the short circuit fault.

[0107] Optionally, if a short circuit is detected in the flight drive system, the first isolation device 301 is disconnected. The first isolation device 301 is located on the wiring between adjacent lift drive units. Figure 1 As shown, the first isolation device 301 is disposed between the lift drive group 1 and the lift drive group 2. The lift drive group 1 includes lift drive unit 101a, lift drive unit 101b, lift drive unit 101c and lift drive unit 101d, and the lift drive group 2 includes lift drive unit 101e, lift drive unit 101f, lift drive unit 101g and lift drive unit 101h.

[0108] Optionally, after the first isolation device 301 is disconnected, the detection of the magnitude and direction of the current in the lift drive group 1 and the lift drive group 2 can identify the target lift drive group where a short circuit fault has occurred.

[0109] Optionally, when a short-circuit fault occurs in the power supply line of the flight drive system, the first isolation device 301 detects whether the short-circuit current exceeds a predetermined short-circuit current threshold. If it does, the first isolation device 301 actively disconnects, completing the first-level fault isolation. For example, Figure 9 As shown, the first-level fault isolation divides the flight drive system into lift drive group 1 and lift drive group 2. At the same time, the first isolation device 301 determines whether the short-circuit fault is located in lift drive group 1 or lift drive group 2 based on the direction of the short-circuit current.

[0110] Step S20: Control the opening or closing of the second isolation device and the third isolation device to identify the target lift drive unit with a short circuit fault in the target lift drive group and isolate the target lift drive unit.

[0111] Optionally, by controlling the opening or closing of the second and third isolation devices, the magnitude and direction of the current in the lift drive unit 201 of the target lift drive group are detected, the range in the target lift drive group is further narrowed down, the target lift drive unit with short circuit fault is identified, and the target lift drive unit is isolated.

[0112] Optionally, after step S20, the method further includes step S30, controlling the closure of the first isolation device and the second isolation device so that the remaining lift drive units other than the target lift drive unit continue to operate.

[0113] Optionally, by sequentially opening or closing the second isolation device 302 and the third isolation device 303 between the lift drive units 201 in the target lift drive group, the target lift drive unit with a short-circuit fault is identified in the target lift drive group. Optionally, as... Figure 2 As shown, if the target lift drive group is lift drive group 1, the third isolation device 303a is opened. If there is no short-circuit current, it is determined that the lift drive unit 201a has not experienced a short-circuit fault. Next, the third isolation device 303a is closed and the second isolation device 302a is opened. If there is no short-circuit current, it is determined that the lift drive unit 201b has not experienced a short-circuit fault. Next, the third isolation device 302a is closed and the third isolation device 303c is opened. If there is no short-circuit current, it is determined that the lift drive unit 201c has not experienced a short-circuit fault, and the lift drive unit 201d has experienced a short-circuit fault, thus accurately identifying the target lift drive unit with a short-circuit fault.

[0114] In the technical solution of this embodiment, by identifying the target lift drive unit with a short circuit fault in the target lift drive group, accurately determining the fault location, and isolating the lift drive unit with the short circuit fault, the normal operation of the flight drive system is ensured.

[0115] Reference Figure 10 , Figure 10 This is a second embodiment of the flight drive fault detection method of the present invention. Based on the first embodiment, step S20 includes:

[0116] Step S21: Control the third isolation device in the target lift drive group that is connected in parallel with the second isolation device to disconnect, so as to divide the target lift drive group into two groups of lift drive groups to be screened;

[0117] Step S22: If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes only one lift drive unit, then the lift drive unit is determined to be the target lift drive unit.

[0118] Step S23: If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes at least two lift drive units, control the third isolation device in the lift drive group to be screened with the short circuit fault to disconnect, so as to identify the target lift drive unit with the short circuit fault and isolate the target lift drive unit.

[0119] Step S30 includes:

[0120] Step S31: Control the first isolation device to close so that the lift drive group to be screened that is not connected to the power supply unit can be reconnected to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

[0121] Optionally, this embodiment is based on the following configuration of the flight drive system structure, where the second isolation device 302 and the third isolation device 303 are arranged in parallel on the line between two adjacent lift drive units 201 located in the middle of each lift drive group, and the second isolation device 302 is in an open state. For example, as shown... Figure 1 As shown, the second isolation device 302a and the third isolation device 303b are connected in parallel and disposed between the lift drive unit 201b and the lift drive unit 201c; the second isolation device 302b and the third isolation device 303e are connected in parallel and disposed between the lift drive unit 201f and the lift drive unit 201g. For example, as... Figure 3 As shown, the second isolation device 302a and the third isolation device 303b are connected in parallel and are installed on the line between the lift drive unit 201a and the lift drive unit 201b. The third isolation device 303b is installed on the line between the lift drive unit 201b and the lift drive unit 201c. The second isolation device 302b and the third isolation device 303f are connected in parallel and are installed on the line between the lift drive unit 201g and the lift drive unit 201h.

[0122] Optionally, the third isolation device 303, which is connected in parallel with the second isolation device 302 in the target lift drive group, is disconnected to divide the target lift drive group into two groups of lift drive groups to be screened, thus completing the secondary fault isolation. For example, as shown... Figure 11 As shown, when the target lift drive group is lift drive group 1, after disconnecting the third isolation device 303b connected in parallel with the second isolation device 302a, lift drive group 1 is divided into two groups of lift drive groups to be screened. One group of lift drive groups to be screened includes lift drive unit 201a and lift drive unit 201b, and the other group of lift drive groups to be screened includes lift drive unit 201c and lift drive unit 201d. For example, as... Figure 14 As shown, when the target lift drive group is lift drive group 1, after disconnecting the third isolation device 303a connected in parallel with the second isolation device 302a, lift drive group 1 is separated into two lift drive groups to be screened. One lift drive group to be screened includes lift drive unit 201a, and the other lift drive group to be screened includes lift drive unit 201b and lift drive unit 201c.

[0123] Optionally, after the secondary fault isolation, the first isolation device is closed to allow the lift drive group to be screened, which is not connected to the power supply unit, to reconnect to the power supply unit of another lift drive group, while the remaining lift drive units other than the target lift drive unit continue to operate.

[0124] Optionally, if a short-circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes only one lift drive unit, then that lift drive unit is determined to be the target lift unit. For example, such as... Figure 14 As shown, a group of lift drive units to be screened includes only lift drive unit 201a.

[0125] Optionally, if a short-circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, the third isolation device in the lift drive group to be screened with the short-circuit fault is disconnected to complete three-level fault isolation, thereby identifying the target lift drive unit with the short-circuit fault and isolating the target lift drive unit. For example, such as... Figure 12 As shown, one set of lift drive groups to be screened includes lift drive unit 201a and lift drive unit 201b, and another set of lift drive groups to be screened includes lift drive unit 201c and lift drive unit 201d. If a short-circuit fault occurs in the lift drive group to be screened connected to the power supply unit, the third isolation device 303a on the line between lift drive unit 201a and lift drive unit 201b is disconnected, completing three-level fault isolation. Optionally, after three-level fault isolation, the second isolation device between the lift drive groups to be screened is closed, so that the remaining lift drive units other than the target lift drive unit continue to operate. For example, as shown... Figure 13 As shown, the second isolation device 302a is closed.

[0126] Optionally, after step S21, the method further includes: if a short-circuit fault exists in the lift drive unit connected to the power supply unit, then the lift drive unit connected to the power supply unit is determined to be the target lift drive unit; step S30 includes: controlling the second isolation device to close, so that the lift drive unit not connected to the power supply unit can reconnect to the power supply unit of another lift drive group, and controlling the remaining lift drive units other than the target lift drive unit to continue operating. For example, as... Figure 13 As shown, if the line connecting the lift drive unit 201a to the power supply unit still has a short circuit fault, the target lift drive unit is determined to be lift drive unit 201a; if the line connecting the lift drive unit 201a to the power supply unit does not have a short circuit fault, the target lift drive unit is determined to be lift drive unit 201b.

[0127] Optionally, after the third isolation device in the lift drive group to be screened that has a short circuit fault is disconnected, if the lift drive unit connected to the power supply unit does not have a short circuit fault, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and power reconfiguration is not required.

[0128] Optionally, if the lift drive group to be screened connected to the power supply unit does not have a short-circuit fault, the third isolation device in another lift drive group to be screened is disconnected, completing the three-level fault isolation. For example, as shown... Figure 13 As shown, one set of lift drive groups to be screened includes lift drive units 201a and 201b, and another set includes lift drive units 201c and 201d. If there is no short-circuit fault in the lift drive groups to be screened connected to the power supply unit, the third isolation device 303c on the line between lift drive units 201c and 201d is disconnected, completing the three-level fault isolation. If a short-circuit fault still exists on the line where lift drive unit 201c is connected to the power supply unit, then lift drive unit 201c is determined to be the target lift drive unit; if there is no short-circuit fault on the line where lift drive unit 201c is connected to the power supply unit, then lift drive unit 201d is determined to be the target lift drive unit. Optionally, after the three-level fault isolation, the second isolation device between the lift drive groups to be screened is closed, so that the remaining lift drive units other than the target lift drive unit continue to operate. For example, as shown... Figure 13 As shown, the second isolation device 302a is closed.

[0129] Optionally, after step S21, the method further includes: if a short circuit fault exists in the lift drive unit connected to the power supply unit, then determine the lift drive unit with a second isolation device on the line of another lift drive group to be screened as the target lift drive unit; step S30 includes: controlling the first isolation device to close, so that the lift drive unit not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and controlling the remaining lift drive units other than the target lift drive unit to continue operating. Optionally, after controlling the third isolation device 303c to disconnect and the second isolation device 302a to close, if there is no short circuit fault in any of the lift drive units connected to the power supply unit 101, that is, no short circuit fault is detected in lift drive units 201a, 201b, and 201c, then the target lift drive unit with a short circuit fault is determined to be lift drive unit 201d; if there is a short circuit fault in any of the lift drive units connected to the power supply unit 101, that is, a short circuit fault is detected in lift drive units 201a, 201b, and 201c, since the possibility of a short circuit fault in lift drive units 201a and 201b has been ruled out beforehand, the target lift drive unit with a short circuit fault is lift drive unit 201c.

[0130] Optionally, after the second isolation device between the lift drive groups to be screened is closed, if there is no short circuit fault in the lift drive unit connected to the power supply unit, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and power reconfiguration is not required.

[0131] In the technical solution of this embodiment, by controlling the opening or closing of the second isolation device and the third isolation device, the target lift drive unit with a short circuit fault is identified in the target lift drive group, the fault location is accurately determined, and the efficiency of fault location determination is improved. The lift drive unit with the short circuit fault is isolated, and the power reconfiguration is achieved by controlling the first isolation device and the second isolation device to ensure the normal operation of the flight drive system.

[0132] Reference Figure 16 , Figure 16 In a third embodiment of the flight drive fault detection method of the present invention, based on the first or second embodiment, step S20 includes:

[0133] Step S24: Control the second isolation device in the target lift drive group to disconnect, so as to divide the target lift drive group into two groups of lift drive groups to be screened;

[0134] Step S25: If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes only one lift drive unit, then the lift drive unit is determined to be the target lift drive unit.

[0135] Step S26: If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes at least two lift drive units, then control the third isolation device in the lift drive group to be screened with the short circuit fault to disconnect, so as to determine the target lift drive unit with the short circuit fault.

[0136] Step S30 includes:

[0137] Step S32: Control the first isolation device to close, so that the lift drive group to be screened that is not connected to the power supply unit can be reconnected to the power supply unit of another lift drive group, and control the remaining lift drive units other than the target lift drive unit to continue to operate.

[0138] Optionally, this embodiment is based on the following configuration of the flight drive system, where the second isolation device 302 and the third isolation device 303 are positioned such that only the second isolation device 302 is provided on the line between two adjacent lift drive units 201 located in the middle of each lift drive group. For example, as shown... Figure 2 As shown, in lift drive group 1, only a second isolation device 302a is provided between lift drive unit 201b and lift drive unit 201c, a third isolation device 303a is provided on the line between lift drive unit 201a and lift drive unit 201b, and a third isolation device 303c is provided on the line between lift drive unit 201c and lift drive unit 201d. In lift drive group 2, only a second isolation device 302b is provided between lift drive unit 201f and lift drive unit g, a third isolation device 303d is provided on the line between lift drive unit 201e and lift drive unit 201f, and a third isolation device 303f is provided on the line between lift drive unit 201g and lift drive unit 201h. For example, as... Figure 4 As shown, in lift drive group 1, only the second isolation device 302a is provided on the line between lift drive unit 201a and lift drive unit 201b, while the third isolation device 303b is provided on the line between lift drive unit 201b and lift drive unit 201c. In lift drive group 2, only the second isolation device 302b is provided on the line between lift drive unit 201g and lift drive unit 201h, while the third isolation device 303e is provided on the line between lift drive unit 201f and lift drive unit 201g.

[0139] Optionally, the second isolation device 302 in the target lift drive group is disconnected to divide the target lift drive group into two groups of lift drive groups to be screened, thus completing a two-stage fault isolation. For example, as shown... Figure 17 As shown, when the target lift drive group is lift drive group 1, after disconnecting the second isolation device 302a, lift drive group 1 is divided into two groups of lift drive groups to be screened. One group of lift drive groups to be screened includes lift drive unit 201a and lift drive unit 201b, and the other group of lift drive groups to be screened includes lift drive unit 201c and lift drive unit 201d. For example, as... Figure 17 As shown, when the target lift drive group is lift drive group 1, after disconnecting the second isolation device 302a, lift drive group 1 is separated into two lift drive groups to be screened. One lift drive group to be screened includes lift drive unit 201a, and the other lift drive group to be screened includes lift drive unit 201b and lift drive unit 201c.

[0140] Optionally, after the secondary fault isolation, the first isolation device is closed to allow the lift drive group to be screened, which is not connected to the power supply unit, to reconnect to the power supply unit of another lift drive group, while the remaining lift drive units other than the target lift drive unit continue to operate.

[0141] Optionally, if a short-circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes only one lift drive unit, then that lift drive unit is determined to be the target lift unit. For example, such as... Figure 20 As shown, a group of lift drive units to be screened includes only lift drive unit 201a.

[0142] Optionally, if a short-circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, the third isolation device in the lift drive group to be screened with the short-circuit fault is disconnected to complete three-level fault isolation, thereby identifying the target lift drive unit with the short-circuit fault and isolating the target lift drive unit. For example, such as... Figure 18 As shown, one set of lift drive groups to be screened includes lift drive unit 201a and lift drive unit 201b, and another set of lift drive groups to be screened includes lift drive unit 201c and lift drive unit 201d. If a short-circuit fault occurs in the lift drive group to be screened connected to the power supply unit, the third isolation device 303a on the line between lift drive unit 201a and lift drive unit 201b is disconnected, completing three-level fault isolation. Optionally, after three-level fault isolation, the second isolation device between the lift drive groups to be screened is closed, so that the remaining lift drive units other than the target lift drive unit continue to operate. For example, as shown... Figure 18 As shown, the second isolation device 302a is closed.

[0143] Optionally, after step S24, the method further includes: if a short-circuit fault exists in the lift drive unit connected to the power supply unit, then the lift drive unit connected to the power supply unit is determined to be the target lift drive unit; step S30 includes: controlling the second isolation device to close, so that the lift drive unit not connected to the power supply unit can reconnect to the power supply unit of another lift drive group, and controlling the remaining lift drive units other than the target lift drive unit to continue operating. For example, as... Figure 20 As shown, if a short circuit fault still exists in the line connecting the lift drive unit 201a to the power supply unit, then the target lift drive unit is determined to be lift drive unit 201a; Figure 21 As shown, if there is no short circuit fault in the line where the lift drive unit 201a connected to the power supply unit is located, then the target lift drive unit is determined to be the lift drive unit 201b.

[0144] Optionally, after the third isolation device in the lift drive group to be screened that has a short circuit fault is disconnected, if the lift drive unit connected to the power supply unit does not have a short circuit fault, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and power reconfiguration is not required.

[0145] Optionally, if the lift drive group to be screened connected to the power supply unit does not have a short-circuit fault, the third isolation device in another lift drive group to be screened is disconnected, completing the three-level fault isolation. For example, as shown... Figure 19 As shown, one set of lift drive groups to be screened includes lift drive units 201a and 201b, and another set includes lift drive units 201c and 201d. If there is no short-circuit fault in the lift drive groups to be screened connected to the power supply unit, the third isolation device 303c on the line between lift drive units 201c and 201d is disconnected, completing the three-level fault isolation. If a short-circuit fault still exists on the line where lift drive unit 201c is connected to the power supply unit, then lift drive unit 201c is determined to be the target lift drive unit; if there is no short-circuit fault on the line where lift drive unit 201c is connected to the power supply unit, then lift drive unit 201d is determined to be the target lift drive unit. Optionally, after the three-level fault isolation, the second isolation device between the lift drive groups to be screened is closed, so that the remaining lift drive units other than the target lift drive unit continue to operate. For example, as shown... Figure 19 As shown, the second isolation device 302a is closed.

[0146] Optionally, after step S24, the method further includes: if a short circuit fault exists in the lift drive unit connected to the power supply unit, then determine the lift drive unit with a second isolation device on the line of another lift drive group to be screened as the target lift drive unit; step S30 includes: controlling the first isolation device to close, so that the lift drive unit not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and controlling the remaining lift drive units other than the target lift drive unit to continue operating. Optionally, after controlling the third isolation device 303c to disconnect and the second isolation device 302a to close, if there is no short circuit fault in any of the lift drive units connected to the power supply unit 101, that is, no short circuit fault is detected in lift drive units 201a, 201b, and 201c, then the target lift drive unit with a short circuit fault is determined to be lift drive unit 201d; if there is a short circuit fault in any of the lift drive units connected to the power supply unit 101, that is, a short circuit fault is detected in lift drive units 201a, 201b, and 201c, since the possibility of a short circuit fault in lift drive units 201a and 201b has been ruled out beforehand, the target lift drive unit with a short circuit fault is lift drive unit 201c.

[0147] Optionally, after the second isolation device between the lift drive groups to be screened is closed, if there is no short circuit fault in the lift drive unit connected to the power supply unit, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and power reconfiguration is not required.

[0148] In the technical solution of this embodiment, by controlling the opening or closing of the second isolation device and the third isolation device, the target lift drive unit with a short circuit fault is identified in the target lift drive group, the fault location is accurately determined, and the efficiency of fault location determination is improved. The lift drive unit with the short circuit fault is isolated, and the power reconfiguration is achieved by controlling the first isolation device and the second isolation device to ensure the normal operation of the flight drive system.

[0149] In the technical solution of this embodiment, the opening or closing of the second isolation device 302 and the third isolation device 303 is controlled to identify the target lift drive unit with a short circuit fault in the target lift drive group, accurately determine the fault location, improve the efficiency of fault location determination, and isolate the lift drive unit 201 with the short circuit fault to ensure the normal operation of the flight drive system.

[0150] The present invention also provides a flight drive system, the flight drive system including a memory, a processor, and a flight drive fault detection program stored in the memory and executable on the processor, wherein when the flight drive fault detection program is executed by the processor, it implements the various steps of the flight drive fault detection method as described in the above embodiments.

[0151] The present invention also provides a computer-readable storage medium storing a flight drive fault detection program, which, when executed by a processor, implements the various steps of the flight drive fault detection method described in the above embodiments.

[0152] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0153] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, system, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, system, article, or apparatus that includes that element.

[0154] Through the above description of the embodiments, those skilled in the art can clearly understand that the systems described in the embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, parking management device, air conditioner, or network device, etc.) to execute the systems described in the various embodiments of the present invention.

[0155] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A flight propulsion system, characterized in that, The flight propulsion system includes: At least two power supply units; At least two sets of lift drive groups are connected in parallel and then connected to the power supply unit. Each lift drive group includes multiple lift drive units, wherein the lift drive units located at the edge are directly connected to the power supply unit. A first isolation device is disposed on the line between adjacent lift drive groups; The second isolation device is disposed on the line between two adjacent lift drive units in the middle of each lift drive group, or the second isolation device is disposed on the line of the lift drive unit in the middle of each lift drive group near the power supply unit. Both the first isolation device and the second isolation device are solid-state power controllers. The third isolation device is installed on the line between two adjacent lift drive units in each lift drive group. The initial state of the second isolation device is open, and the initial state of the third isolation device, which is connected in parallel with the second isolation device, is closed. The third isolation device is an intelligent active safety device. The solid-state power controller is configured to control the intelligent active fuse to disconnect according to the direction of the short-circuit current, and the flight drive system is configured to, when a short-circuit fault is detected, determine the target lift drive group and the target lift drive unit with the short-circuit fault by controlling the opening or closing of the first isolation device, the second isolation device and the third isolation device, and isolate the target lift drive unit.

2. A method for detecting flight drive faults, characterized in that, The flight drive fault detection method, applied to the flight drive system of claim 1, includes: If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to disconnect, and the magnitude and direction of the current in the lift drive group are detected to determine the target lift drive group with the short circuit fault. Control the opening or closing of the second and third isolation devices to detect the magnitude and direction of the current in the lift drive unit of the target lift drive group, so as to identify the target lift drive unit with a short circuit fault in the target lift drive group and isolate the target lift drive unit; Control the closing of the first isolation device and / or the second isolation device so that the remaining lift drive units other than the target lift drive unit can continue to operate; Wherein, when the lift drive assembly is provided with the second isolation device and the third isolation device connected in parallel, and the second isolation device is in an open state, the step of controlling the opening or closing of the second isolation device and the third isolation device includes: The third isolation device, which is connected in parallel with the second isolation device in the target lift drive group, is disconnected to divide the target lift drive group into two groups of lift drive groups to be screened. If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes only one lift drive unit, then the lift drive unit is determined to be the target lift drive unit. If a short-circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, the third isolation device in the lift drive group to be screened with the short-circuit fault is controlled to disconnect, so as to identify the target lift drive unit with the short-circuit fault and isolate the target lift drive unit.

3. The flight drive fault detection method as described in claim 2, characterized in that, The steps of controlling the closure of the first isolation device and / or the second isolation device include: The first isolation device is closed to reconnect the lift drive group to be screened, which is not connected to the power supply unit, to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

4. The flight drive fault detection method as described in claim 3, characterized in that, After the step of disconnecting the third isolation device in the target lift drive group that is connected in parallel with the second isolation device, the method further includes: If there is no short circuit fault in the lift drive group to be screened connected to the power supply unit, then the third isolation device in the other lift drive group to be screened is disconnected. The steps of controlling the closure of the first isolation device and / or the second isolation device include: The second isolation device between the lift drive groups to be screened is closed so that the remaining lift drive units other than the target lift drive unit can continue to operate.

5. A flight propulsion system, characterized in that, The flight propulsion system includes: At least two power supply units; At least two sets of lift drive groups are connected in parallel and then connected to the power supply unit. Each lift drive group includes multiple lift drive units, wherein the lift drive units located at the edge are directly connected to the power supply unit. A first isolation device is disposed on the line between adjacent lift drive groups; The second isolation device is provided only on the line between two adjacent lift drive units in the middle of each lift drive group, or the second isolation device is provided on the line of the lift drive unit in the middle of each lift drive group near the power supply unit. Both the first isolation device and the second isolation device are solid-state power controllers. The third isolation device is provided at least on the line between two adjacent lift drive units in each lift drive group, except for the second isolation device. The third isolation device is an intelligent active safety device. The solid-state power controller is configured to control the intelligent active fuse to disconnect according to the direction of the short-circuit current, and the flight drive system is configured to, when a short-circuit fault is detected, determine the target lift drive group and the target lift drive unit with the short-circuit fault by controlling the opening or closing of the first isolation device, the second isolation device and the third isolation device, and isolate the target lift drive unit.

6. A method for detecting flight drive faults, characterized in that, The flight drive fault detection method, applied to the flight drive system of claim 5, includes: If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to disconnect, and the magnitude and direction of the current in the lift drive group are detected to determine the target lift drive group with the short circuit fault. Control the opening or closing of the second and third isolation devices to detect the magnitude and direction of the current in the lift drive unit of the target lift drive group, so as to identify the target lift drive unit with a short circuit fault in the target lift drive group and isolate the target lift drive unit; Control the closing of the first isolation device and / or the second isolation device so that the remaining lift drive units other than the target lift drive unit can continue to operate; The steps of controlling the opening or closing of the second and third isolation devices include: The second isolation device in the target lift drive group is disconnected to divide the target lift drive group into two groups of lift drive groups to be screened. If the lift drive group to be screened connected to the power supply unit has a short circuit fault, and the lift drive group to be screened includes only one lift drive unit, then the lift drive unit is determined to be the target lift drive unit. If a short circuit fault exists in the lift drive group to be screened connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, then the third isolation device in the lift drive group to be screened with the short circuit fault is disconnected to identify the target lift drive unit with the short circuit fault and isolate the target lift drive unit. The steps of controlling the closure of the first isolation device and / or the second isolation device include: The first isolation device is closed to reconnect the lift drive group to be screened, which is not connected to the power supply unit, to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

7. The flight drive fault detection method as described in claim 6, characterized in that, After the step of disconnecting the second isolation device in the target lift drive group, the method further includes: If there is no short circuit fault in the lift drive group to be screened connected to the power supply unit, then the corresponding third isolation device in the other lift drive group to be screened is disconnected. The steps of controlling the closure of the first isolation device and / or the second isolation device include: The second isolation device between the lift drive groups to be screened is closed so that the remaining lift drive units other than the target lift drive unit can continue to operate.

8. The flight drive fault detection method as described in claim 4 or 6, characterized in that, After the step of disconnecting the third isolation device in the lift drive group to be screened due to a short-circuit fault, the method further includes: If a short circuit fault occurs in the lift drive unit connected to the power supply unit, then the lift drive unit connected to the power supply unit is determined to be the target lift drive unit; The steps of controlling the closure of the first isolation device and / or the second isolation device include: The second isolation device is closed to reconnect the lift drive unit that is not connected to the power supply unit to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

9. The flight drive fault detection method as described in claim 4 or 6, characterized in that, After the step of disconnecting the third isolation device in the lift drive group to be screened due to a short-circuit fault, the method further includes: If the lift drive unit connected to the power supply unit does not have a short circuit fault, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit.

10. The flight drive fault detection method as described in claim 4 or 7, characterized in that, After the step of controlling the closure of the second isolation device between the lift drive groups to be screened, the method further includes: If a short circuit fault occurs in the lift drive unit connected to the power supply unit, then the lift drive unit with a second isolation device installed on the line of another lift drive group to be screened is identified as the target lift drive unit. The steps of controlling the closure of the first isolation device and / or the second isolation device include: The first isolation device is closed to reconnect the lift drive unit that is not connected to the power supply unit to the power supply unit of another lift drive group, and the remaining lift drive units other than the target lift drive unit continue to operate.

11. The flight drive fault detection method as described in claim 4 or 7, characterized in that, After the step of controlling the closure of the second isolation device between the lift drive groups to be screened, the method further includes: If the lift drive unit connected to the power supply unit does not have a short circuit fault, then the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit.

12. A flight propulsion system, characterized in that, The flight drive system includes a memory, a processor, and a flight drive fault detection program stored in the memory and executable on the processor. When executed by the processor, the flight drive fault detection program implements the steps of the flight drive fault detection method as described in any one of claims 2-4 or 6-11.

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