Flight driving system and fault detection method therefor, and computer readable storage medium

Abstract

A flight driving system and a fault detection method therefor, and a computer readable storage medium. The method comprises: if it is detected that a short-circuit fault exists in a flight driving system, controlling a first isolation device (301) to be opened so as to determine a target lift driving group having the short-circuit fault; and controlling opening or closing of a second isolation device (302) and a third isolation device (303), so as to determine, in the target lift driving group, a target lift driving unit (201) having the short-circuit fault, and isolating the target lift driving unit (201). By determining a target lift driving unit (201) having a short-circuit fault in a target lift driving group, the fault position is accurately determined, and the target lift driving unit (201) having the short-circuit fault is isolated, thereby ensuring the normal operation of the flight driving system.

Description

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

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202310710046.1 filed on June 14, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of flying vehicles, and in particular to a flying drive system, a fault detection method thereof, and a computer-readable storage medium. Background Art

[0004] Flight propulsion systems typically utilize a multi-system redundant, high-voltage architecture. This architecture includes multiple power supply units and multiple lift electric drive units. The flight propulsion system 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. In this case, failure to accurately identify the fault point can often lead to the inability of multiple lift drive units and power supply units to operate, resulting in a safety incident.

[0005] Summary of the Invention

[0006] The main purpose of this application is to provide a flight drive system and its fault detection method and computer-readable storage medium, aiming to solve the problem of how to improve the accuracy of flight drive fault detection.

[0007] To achieve the above objectives, the present application provides a flight drive system, which includes:

[0008] At least two power supply units;

[0009] at least two lift drive groups, each of the lift drive groups being connected in parallel and connected to the power supply unit, the lift drive group comprising a plurality of lift drive units;

[0010] a first isolation device, the first isolation device being provided on a line between adjacent lift drive groups;

[0011] a second isolation device, the second isolation device being provided on a line between at least two adjacent lift drive units in each lift drive group;

[0012] A 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.

[0013] In one embodiment, the second isolation device is provided on a line between two adjacent lift driving units located in the middle of each lift driving group.

[0014] In one embodiment, the second isolation device is provided on a line of the lift driving unit located in the middle of each lift driving group close to the power supply unit.

[0015] In one embodiment, the third isolation device and the second isolation device are arranged in parallel on a line between two adjacent lift drive units.

[0016] In one embodiment, the initial state of the second isolation device is an open state, and the initial state of the third isolation device provided in parallel with the second isolation device is a closed state.

[0017] To achieve the above objectives, the present application provides a flight drive fault detection method, which includes the following steps:

[0018] If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to be disconnected to determine the target lift drive group with the short circuit fault;

[0019] The second isolation device and the third isolation device are controlled to be opened or closed, so as to determine a target lift drive unit with a short circuit fault in the target lift drive group and isolate the target lift drive unit.

[0020] In one embodiment, after the step of controlling the opening or closing of the second isolation device and the third isolation device, the method further includes:

[0021] The closing of the first isolation device and / or the second isolation device is controlled to allow the remaining lift driving units except the target lift driving unit to continue to operate.

[0022] In one embodiment, when the lift drive group 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:

[0023] controlling the third isolation device in the target lift driving group, which is connected in parallel with the second isolation device, to be disconnected, so as to divide the target lift driving group into two lift driving groups to be screened;

[0024] If a short circuit fault occurs in the lift drive group to be screened that is connected to the power supply unit, and the lift drive group to be screened includes only one lift drive unit, determining the lift drive unit as the target lift drive unit;

[0025] If a short-circuit fault occurs in the lift drive group to be screened, which is connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, disconnecting the third isolation device in the lift drive group to be screened that has the short-circuit fault, thereby determining a target lift drive unit that has the short-circuit fault and isolating the target lift drive unit;

[0026] The step of controlling the closing of the first isolation device and / or the second isolation device comprises:

[0027] The first isolation device is controlled to close so that the lift drive group to be screened that is not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and the remaining lift drive units except the target lift drive unit are controlled to continue operating.

[0028] In one embodiment, after the step of controlling the disconnection of the third isolation device on the line between two adjacent lift drive units in the target lift drive group, the method further comprises:

[0029] If the lift drive group to be screened, which is connected to the power supply unit, does not have a short circuit fault, controlling the third isolation device in another lift drive group to be screened to be disconnected;

[0030] The step of controlling the closing of the first isolation device and / or the second isolation device comprises:

[0031] The second isolation devices between the lift drive groups to be screened are controlled to be closed, so that the remaining lift drive units except the target lift drive unit continue to operate.

[0032] In one embodiment, in each lift drive group, only the second isolation device is provided on the line between two adjacent lift drive units located in the middle, or the second isolation device is provided on the line between the lift drive unit located in the middle and close to the power supply unit in each lift drive group, and the step of controlling the opening or closing of the second isolation device and the third isolation device includes:

[0033] controlling the second isolation device in the target lift driving group to be disconnected, so as to divide the target lift driving group into two lift driving groups to be screened;

[0034] If a short circuit fault occurs in the lift drive group to be screened that is connected to the power supply unit, and the lift drive group to be screened includes only one lift drive unit, determining the lift drive unit as the target lift drive unit;

[0035] If a short-circuit fault occurs in the lift drive group to be screened that is connected to the power supply unit, and the lift drive group to be screened includes at least two lift drive units, controlling the third isolation device in the lift drive group to be screened that has the short-circuit fault to be disconnected, so as to identify a target lift drive unit that has the short-circuit fault and isolate the target lift drive unit;

[0036] The step of controlling the closing of the first isolation device and / or the second isolation device comprises:

[0037] The first isolation device is controlled to close so that the lift drive group to be screened that is not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and the remaining lift drive units except the target lift drive unit are controlled to continue operating.

[0038] In one embodiment, after the step of controlling the second isolation device in the target lift driving group to disconnect, the method further includes:

[0039] If the lift drive group to be screened, which is connected to the power supply unit, does not have a short circuit fault, controlling the corresponding third isolation device in another lift drive group to be screened to be disconnected;

[0040] The step of controlling the closing of the first isolation device and / or the second isolation device comprises:

[0041] The second isolation devices between the lift drive groups to be screened are controlled to be closed, so that the remaining lift drive units except the target lift drive unit continue to operate.

[0042] In one embodiment, after the step of controlling the third isolation device in the lift drive group to be screened that has a short circuit fault to be disconnected, the method further includes:

[0043] If a short circuit fault occurs in the lift driving unit connected to the power supply unit, determining the lift driving unit connected to the power supply unit as the target lift driving unit;

[0044] The step of controlling the closing of the first isolation device and / or the second isolation device comprises:

[0045] The second isolation device is controlled 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 the remaining lift drive units except the target lift drive unit are controlled to continue to operate.

[0046] In one embodiment, after the step of controlling the third isolation device in the lift drive group to be screened that has a short circuit fault to be disconnected, the method further includes:

[0047] If the lift driving unit connected to the power supply unit does not have a short circuit fault, a lift driving unit not connected to the power supply unit is determined as the target lift driving unit.

[0048] In one embodiment, after the step of controlling the closing of the second isolation device between the lift drive groups to be screened, the method further comprises:

[0049] If a short circuit fault occurs in the lift drive unit connected to the power supply unit, a lift drive unit provided with a second isolation device on another lift drive group line to be screened is determined as the target lift drive unit;

[0050] The step of controlling the closing of the first isolation device and / or the second isolation device comprises:

[0051] The first isolation device is controlled 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 the remaining lift drive units except the target lift drive unit are controlled to continue operating.

[0052] In one embodiment, after the step of controlling the closing of the second isolation device between the lift drive groups to be screened, the method further comprises:

[0053] If the lift driving unit connected to the power supply unit does not have a short circuit fault, a lift driving unit not connected to the power supply unit is determined as the target lift driving unit.

[0054] To achieve the above-mentioned objectives, the present application also provides a flight drive system, which includes a memory, a processor, and a flight drive fault detection program stored in the memory and executable on the processor. When the flight drive fault detection program is executed by the processor, it implements the various steps of the flight drive fault detection method described above.

[0055] To achieve the above objectives, the present application also provides a computer-readable storage medium, which stores a flight drive fault detection program. When the flight drive fault detection program is executed by a processor, it implements the various steps of the flight drive fault detection method described above.

[0056] The present application provides a flight drive system, a fault detection method, and a computer-readable storage medium. If a short-circuit fault is detected in the flight drive system, a first isolation device is controlled to open to identify a 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 within the target lift drive group and isolate 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 lift drive unit with the short-circuit fault is isolated, ensuring the normal operation of the flight drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] FIG1 is a schematic structural diagram of the flight drive system in this application;

[0058] FIG2 is a schematic structural diagram of the flight drive system in this application;

[0059] FIG3 is a schematic structural diagram of the flight drive system in this application;

[0060] FIG4 is a schematic structural diagram of the flight drive system in this application;

[0061] FIG5 is a schematic structural diagram of the flight drive system in this application;

[0062] FIG6 is a schematic structural diagram of the flight drive system in this application;

[0063] FIG7 is a schematic diagram of the hardware structure of the flight drive system involved in an embodiment of the present application;

[0064] FIG8 is a flow chart of a first embodiment of a flight drive fault detection method of the present application;

[0065] FIG9 is a schematic structural diagram of the flight drive system in this application;

[0066] FIG10 is a flow chart of a second embodiment of the flight drive fault detection method of the present application;

[0067] FIG11 is a schematic structural diagram of the flight drive system in this application;

[0068] FIG12 is a schematic structural diagram of the flight drive system in this application;

[0069] FIG13 is a schematic structural diagram of the flight drive system in this application;

[0070] FIG14 is a schematic structural diagram of the flight drive system in this application;

[0071] FIG15 is a schematic structural diagram of the flight drive system in this application;

[0072] FIG16 is a detailed flowchart of step S21 of the fourth embodiment of the flight drive fault detection method of the present application;

[0073] FIG17 is a schematic structural diagram of the flight drive system in this application;

[0074] FIG18 is a schematic structural diagram of the flight drive system in this application;

[0075] FIG19 is a schematic structural diagram of the flight drive system in this application;

[0076] FIG20 is a schematic structural diagram of the flight drive system in this application;

[0077] FIG21 is a schematic structural diagram of the flight drive system in this application.

[0078] Description of Figure Numbers:

[0079] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0080] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0081] The main solution of the embodiment of the present application is: if a short circuit fault is detected in the flight drive system, the first isolation device is controlled to be disconnected to determine the target lift drive group with the short circuit fault; the second isolation device and the third isolation device are controlled to be opened or closed to determine the target lift drive unit with the short circuit fault in the target lift drive group, and isolate the target lift drive unit.

[0082] 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.

[0083] 1 or 2 , the present application provides a flight drive system, comprising:

[0084] at least two power supply units 101;

[0085] At least two lift drive groups, wherein the plurality of lift drive groups are connected in parallel and connected to the power supply unit 101 , and the lift drive group includes a plurality of lift drive units 201 ;

[0086] A first isolation device 301, wherein the first isolation device 301 is provided on a line between adjacent lift drive groups;

[0087] a second isolation device 302, the second isolation device 302 being provided on a line between at least two adjacent lift drive units 201 in each lift drive group;

[0088] The third isolation device 303 is at least provided on the line between two adjacent lift drive units 201 in each lift drive group except for the second isolation device.

[0089] In one embodiment, the power supply unit 101 is used to provide power for each lift drive unit 201. In one embodiment, the power supply unit 101 is a battery or a power cabinet, etc. As shown in Figures 5 and 6, a fuse and a BMS (Battery Management System) are provided inside the power supply unit 101. 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 and avoid the continuous occurrence of short-circuit conditions. The BMS inside the power supply unit 101 detects in real time whether there is a short-circuit current, and can effectively drive the first isolation device 301, the second isolation device 302 and the third isolation device 303 to perform a safety action. For example, as shown in Figure 3 or Figure 4, the two power supply units 101 respectively drive different first isolation devices 301, the second isolation device 302 and the third isolation device 303 to perform a safety action.

[0090] In one embodiment, the lift driving unit 201 may be a motor or other types of loads.

[0091] In one embodiment, each lift drive group is connected in parallel and then connected to the power supply unit 101, wherein each lift drive group includes multiple lift drive units 201. For example, two power supply units 101 and two lift drive groups are used as an example, but the number of power supply units 101 and lift drive groups is not limited to two. As shown in FIG1 or FIG2 , lift drive group 1 includes lift drive unit 201a, lift drive unit 201b, lift drive unit 201c, and lift drive unit 201d; lift drive group 2 includes lift drive unit 201e, lift drive unit 201f, lift drive unit 201g, and lift drive unit 201h. Lift drive group 1 and lift drive group 2 are connected in parallel and then connected to the power supply unit 101.

[0092] In one embodiment, both the first isolation device 301 and the second isolation device 302 can be SSPC (Solid-State Power Controller). SSPC is bidirectionally conductive and can quickly cut off the short-circuit current within 30us. It can also detect the direction of the short-circuit current and drive the third isolation device 303 to take action according to the current direction. SSPC has a reconstruction function, that is, when the SSPC is reclosed to detect a short-circuit fault, the inductance of the power supply line is used to pre-charge the lift electric drive unit to avoid the power supply unit 101 being connected to a capacitive load and causing a large current to damage the device. The use of a 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, i.e., the intelligent active fuse, to disconnect according to the direction of the short-circuit current, thereby reducing the fault identification time.

[0093] In one embodiment, as shown in Figures 5 and 6 , the third isolation device 303 may be an intelligent active fuse. The fuse can effectively accept control of the power supply unit 101BMS or SSPC to actively disconnect high short-circuit currents. The disconnection time of this intelligent active fuse is much shorter than the thermal blow time of a traditional passive fuse, effectively reducing the time required to isolate the fault and reconfigure the distribution system.

[0094] In one embodiment, a first isolation device 301 is disposed on the circuit between adjacent lift drive groups. When the first isolation device 301 is disconnected, the circuit between the adjacent lift drive groups is disconnected. For example, as shown in FIG1 or FIG2 , the first isolation device 301 is located between lift drive group 1 and lift drive group 2. When the first isolation device 301 is disconnected, lift drive group 1 is connected to power supply unit 101a, and lift drive group 2 is connected to power supply unit 101b.

[0095] In one embodiment, the second isolation device 302 is disposed on the line between at least two adjacent lift drive units 201 in each lift drive group. In one embodiment, the second isolation device 302 is disposed on the line between two adjacent lift drive units 201 located in the middle of each lift drive group. When each lift drive group includes an even number of lift drive units, for example, a lift drive group includes four lift drive units, the second isolation device 302 in each lift drive group is disposed on the line between two adjacent lift drive units 201 in the middle. For example, as shown in FIG1 or FIG2 , the second isolation device 302 in lift drive group 1 is disposed on the line between lift drive unit 201b and lift drive unit 201c, and the second isolation device 302 in lift drive group 2 is disposed on the line between lift drive unit 201f and lift drive unit 201g.

[0096] In one embodiment, the second isolation device 302 is disposed on a line between the middle lift drive unit 201 in each lift drive group and 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 three lift drive units, the second isolation device 302 in each lift drive group is disposed on a line between the middle lift drive unit 201 and the power supply unit 101. For example, as shown in FIG3 or FIG4 , the second isolation device 302 in lift drive group 1 is disposed on a line between lift drive unit 201a and lift drive unit 201b, and the second isolation device 302 in lift drive group 2 is disposed on a line between lift drive unit 201g and lift drive unit 201h.

[0097] In one embodiment, a third isolation device 303 is disposed on the line between two adjacent lift drive units 201 in each lift drive group, excluding the second isolation device 302. As shown in FIG2 or FIG4 , one of the second isolation device 302 or the third isolation device 303 is disposed 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 in FIG1 , a second isolation device 302 is disposed between lift drive unit 201b and lift drive unit 201c. When the second isolation device 302 in lift drive group 1 is disconnected, lift drive group 1 is divided into two parts: one part is lift drive unit 201a and lift drive unit 201b, and the other part is lift drive unit 201c and lift drive unit 201d. As shown in Figure 2, in the lift drive group 1, a third isolation device 303a is provided between the lift drive unit 201a and the lift drive unit 201b, and a third isolation device 303c is provided between the lift drive unit 201c and the lift drive unit 201d. When the third isolation device 303a is disconnected, the line between the lift drive unit 201a and the lift drive unit 201b is disconnected. When the third isolation device 303c is disconnected, the line between the lift drive unit 201c and the lift drive unit 201d is disconnected.

[0098] In one embodiment, the third isolation device 303 and the second isolation device 302 are arranged in parallel on the line between two adjacent lift drive units 201. For example, as shown in FIG1 , the third isolation device 303b is arranged between lift drive unit 201b and lift drive unit 201c, and the second isolation device 302a and the third isolation device 303b are connected in parallel and then connected between lift drive unit 201b and lift drive unit 201c.

[0099] In one embodiment, the second isolation device 302 on the line between two adjacent lift drive units 201 located in the middle 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 in FIG1 , the second isolation device 302a is initially in an open state, and the third isolation device 303b is initially in a closed state.

[0100] In one embodiment, the lift drive units 201 at the edge are directly connected to the power supply unit 101. For example, as shown in FIG1 or FIG2 , the lift drive unit 201a is directly connected to the power supply unit 101, and the lift drive unit 201h is directly connected to the power supply unit 101.

[0101] In one embodiment, a power distribution copper bus 401 is provided between the power supply unit 101 and the lift drive unit.

[0102] In the technical solution of this embodiment, by providing 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, i.e., the flight drive system where the short-circuit fault occurs, is determined through each isolation device, and the lift drive system where the short-circuit fault occurs is isolated to ensure the normal operation of the flight drive system.

[0103] As an implementation solution, the flight drive system may be as shown in FIG7 .

[0104] The embodiment of the present application relates 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 achieve connection and communication between these components.

[0105] Memory 102 can be a high-speed RAM memory or a non-volatile memory, such as a disk drive. As shown in FIG7 , memory 102 , a computer-readable storage medium, can include a flight drive fault detection program. Processor 101 can be configured to invoke the flight drive fault detection program stored in memory 102 and execute the following flight drive fault detection method-related operations.

[0106] Based on the hardware architecture and structure of the above-mentioned flight drive system, an embodiment of the flight drive fault detection method of the present application is proposed.

[0107] 8 , which shows a first embodiment of a flight drive fault detection method of the present application, the flight drive fault detection method includes the following steps:

[0108] Step S10: If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to be disconnected to determine the target lift drive group with the short circuit fault.

[0109] In one embodiment, if a current short circuit is detected in the flight drive system, the first isolation device 301 is controlled to be disconnected, wherein the first isolation device 301 is arranged on the line between adjacent lift drive groups. As shown in Figure 1, the first isolation device 301 is arranged between lift drive group 1 and lift drive group 2, wherein lift drive group 1 includes lift drive unit 101a, lift drive unit 101b, lift drive unit 101c and lift drive unit 101d, and lift drive group 2 includes lift drive unit 101e, lift drive unit 101f, lift drive unit 101g and lift drive unit 101h.

[0110] After the first isolation device 301 is disconnected, the current magnitude and current direction in the lift drive group 1 and the lift drive group 2 are detected to determine the target lift drive group having the short circuit fault among the lift drive group 1 and the lift drive group 2 .

[0111] In one embodiment, when a short circuit occurs in the power supply line of the flight propulsion system, a first isolation device 301 detects whether the short-circuit current exceeds a threshold indicating a short-circuit current. If so, the first isolation device 301 automatically disconnects, completing primary fault isolation. As shown in Figure 9, primary fault isolation divides the flight propulsion system into lift drive group 1 and lift drive group 2. Furthermore, 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.

[0112] Step S20 : ​​Control the opening or closing of the second isolation device and the third isolation device to determine a target lift drive unit with a short circuit fault in the target lift drive group, and isolate the target lift drive unit.

[0113] In one embodiment, by controlling the opening or closing of the second isolation device and the third isolation device, the current magnitude and current direction in the lift drive unit 201 in the target lift drive group are detected, the range is further narrowed in the target lift drive group, the target lift drive unit with a short circuit fault is determined, and the target lift drive unit is isolated.

[0114] In one embodiment, after step S20, the method further includes: step S30 of controlling the closing of the first isolation device and the second isolation device to allow the remaining lift driving units except the target lift driving unit to continue to operate.

[0115] In one embodiment, the target lift drive unit in the target lift drive group with a short circuit fault is identified 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. In one embodiment, as shown in FIG2 , if the target lift drive group is lift drive group 1, the third isolation device 303a is controlled to be opened. If no short circuit current is present, it is determined that lift drive unit 201a has not experienced a short circuit fault. Next, the third isolation device 303a is controlled to be closed and the second isolation device 302a is controlled to be opened. If no short circuit current is present, it is determined that lift drive unit 201b has not experienced a short circuit fault. Next, the third isolation device 302a is controlled to be closed and the third isolation device 303c is controlled to be opened. If no short circuit current is present, it is determined that lift drive unit 201c has not experienced a short circuit fault and that lift drive unit 201d has experienced a short circuit fault, thereby accurately identifying the target lift drive unit with a short circuit fault.

[0116] In the technical solution of this embodiment, by determining 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.

[0117] Referring to FIG. 10 , FIG. 10 is a second embodiment of the flight drive fault detection method of the present application. Based on the first embodiment, step S20 includes:

[0118] Step S21, controlling the third isolation device in the target lift driving group, which is connected in parallel with the second isolation device, to be disconnected, so as to divide the target lift driving group into two lift driving groups to be screened;

[0119] Step S22: if the lift drive group to be screened, which is 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, determining the lift drive unit as the target lift drive unit;

[0120] Step S23: If the lift drive group to be screened, which is 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, controlling the third isolation device in the lift drive group to be screened with the short-circuit fault to be disconnected, so as to identify a target lift drive unit with the short-circuit fault, and isolating the target lift drive unit;

[0121] The step S30 includes:

[0122] Step S31 , controlling the first isolation device to close so that the lift drive group to be screened that is not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and the remaining lift drive units except the target lift drive unit continue to operate.

[0123] In one embodiment, the second isolation device 302 and the third isolation device 303 are positioned in parallel in the structure of the flight drive system, wherein the second isolation device 302 and the third isolation device 303 are positioned in parallel on the line between two adjacent lift drive units 201 in each lift drive group, with the second isolation device 302 being disconnected. For example, as shown in FIG1 , the second isolation device 302a and the third isolation device 303b are positioned in parallel between lift drive units 201b and 201c; the second isolation device 302b and the third isolation device 303e are positioned in parallel between lift drive units 201f and 201g. For example, as shown in FIG3 , the second isolation device 302a and the third isolation device 303b are connected in parallel and are disposed on the line between the lift drive unit 201a and the lift drive unit 201b, while the third isolation device 303b is disposed 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 disposed on the line between the lift drive unit 201g and the lift drive unit 201h.

[0124] In one embodiment, the third isolation device 303 in the target lift drive group, which is connected in parallel with the second isolation device 302, is controlled to be disconnected to divide the target lift drive group into two groups of lift drive groups to be screened, thereby completing secondary fault isolation. For example, as shown in FIG11 , when the target lift drive group is lift drive group 1, the third isolation device 303b connected in parallel with the second isolation device 302a is disconnected, and 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 shown in FIG14 , when the target lift drive group is lift drive group 1, after the third isolation device 303a connected in parallel with the second isolation device 302a is disconnected, 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 the other group of lift drive groups to be screened includes lift drive unit 201b and lift drive unit 201c.

[0125] In one embodiment, after the secondary fault is isolated, the first isolation device is controlled to close so that the lift drive group to be screened that is not connected to the power supply unit is 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.

[0126] In one embodiment, if a short circuit fault occurs in a lift drive group connected to a power supply unit and the lift drive group includes only one lift drive unit, the target lift drive unit is determined to be that lift drive unit. For example, as shown in FIG14 , a lift drive group includes only lift drive unit 201a.

[0127] In one embodiment, if a short circuit fault occurs in a lift drive group to be screened, connected to a 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 be disconnected, completing three-level fault isolation. This allows the target lift drive unit to be identified and isolated. For example, as shown in FIG12 , one lift drive group to be screened includes lift drive unit 201a and lift drive unit 201b, and another lift drive group 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 controlled to be disconnected, completing three-level fault isolation. In one embodiment, after three-level fault isolation, the second isolation device between the lift drive groups to be screened is controlled to be closed, allowing the remaining lift drive units, excluding the target lift drive unit, to continue operating. Exemplarily, as shown in FIG13 , the second isolation device 302 a is controlled to be closed.

[0128] In one embodiment, after step S21, the following further comprises: if a short circuit fault exists in the lift drive unit connected to the power supply unit, determining that the lift drive unit connected to the power supply unit is the target lift drive unit; and step S30 comprises: controlling the second 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 operation. For example, as shown in FIG13 , if a short circuit fault still exists in the line where lift drive unit 201a connected to the power supply unit is located, the target lift drive unit is determined to be lift drive unit 201a; if a short circuit fault does not exist in the line where lift drive unit 201a connected to the power supply unit is located, the target lift drive unit is determined to be lift drive unit 201b.

[0129] In one embodiment, after controlling the disconnection of the third isolation device in the lift drive group to be screened that has a short-circuit fault, if the lift drive unit connected to the power supply unit does not have a short-circuit fault, the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and no power reconstruction is required at this time.

[0130] In one embodiment, 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 the other lift drive group to be screened is controlled to be disconnected, completing three-level fault isolation. For example, as shown in FIG13 , one lift drive group to be screened includes lift drive unit 201a and lift drive unit 201b, and the other lift drive group to be screened includes lift drive unit 201c and lift drive unit 201d. 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 303c on the line between lift drive unit 201c and lift drive unit 201d is controlled to be disconnected, completing three-level fault isolation. If the line connecting lift drive unit 201c to the power supply unit still has a short circuit fault, the target lift drive unit is determined to be lift drive unit 201c. If the line connecting lift drive unit 201c to the power supply unit does not have a short circuit fault, the target lift drive unit is determined to be lift drive unit 201d. In one embodiment, after the third-level fault is isolated, the second isolation device between the lift drive groups to be screened is controlled to close, so that the remaining lift drive units other than the target lift drive unit continue to operate. For example, as shown in FIG13 , the second isolation device 302a is controlled to close.

[0131] In one embodiment, after step S21, the further step includes: if a short circuit fault occurs in a lift drive unit connected to the power supply unit, determining that a lift drive unit provided with a second isolation device on the line of another lift drive group to be screened is the target lift drive unit; and 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 to operate. In one embodiment, after the third isolation device 303c is controlled to be opened and the second isolation device 302a is controlled to be closed, if no short-circuit fault exists in the lift drive units connected to the power supply unit 101, that is, no short-circuit fault is detected in the lift drive unit 201a, the lift drive unit 201b, and the lift drive unit 201c, then the target lift drive unit with the short-circuit fault is determined to be the lift drive unit 201d; if a short-circuit fault exists in the lift drive units connected to the power supply unit 101, that is, a short-circuit fault is detected in the lift drive unit 201a, the lift drive unit 201b, and the lift drive unit 201c, since the possibility of the short-circuit fault in the lift drive unit 201a and the lift drive unit 201b has been ruled out before, the target lift drive unit with the short-circuit fault is the lift drive unit 201c.

[0132] In one embodiment, after controlling the second isolation device between the lift drive groups to be screened to be closed, if the lift drive unit connected to the power supply unit does not have a short circuit fault, the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and power reconstruction is not required at this time.

[0133] 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 determined 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 a short-circuit fault is isolated, and power reconstruction is achieved by controlling the first isolation device and the second isolation device to ensure the normal operation of the flight drive system.

[0134] Referring to FIG. 16 , FIG. 16 is a third embodiment of the flight drive fault detection method of the present application. Based on the first or second embodiment, step S20 includes:

[0135] Step S24, controlling the second isolation device in the target lift driving group to be disconnected, so as to divide the target lift driving group into two lift driving groups to be screened;

[0136] Step S25: if the lift drive group to be screened, which is 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, determining the lift drive unit as the target lift drive unit;

[0137] Step S26: If the lift drive group to be screened, which is 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, disconnecting the third isolation device in the lift drive group to be screened that has the short-circuit fault, so as to identify the target lift drive unit that has the short-circuit fault.

[0138] The step S30 includes:

[0139] 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 is reconnected to the power supply unit of another lift drive group, and control the remaining lift drive units except the target lift drive unit to continue operating.

[0140] In one embodiment, this embodiment is based on the following arrangement of the second isolation device 302 and the third isolation device 303 in the structure of the flight drive system: In each lift drive group, only the second isolation device 302 is disposed on the line between two adjacent lift drive units 201 located in the middle. For example, as shown in FIG2 , in lift drive group 1, only the second isolation device 302a is disposed between lift drive unit 201b and lift drive unit 201c, the third isolation device 303a is disposed on the line between lift drive unit 201a and lift drive unit 201b, and the third isolation device 303c is disposed on the line between lift drive unit 201c and lift drive unit 201d. In lift drive group 2, only the 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 shown in FIG4 , 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, and 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, and the third isolation device 303e is provided on the line between lift drive unit 201f and lift drive unit 201g.

[0141] In one embodiment, the second isolation device 302 in the target lift drive group is controlled to be disconnected to divide the target lift drive group into two groups of lift drive groups to be screened, thereby completing secondary fault isolation. For example, as shown in FIG17 , when the target lift drive group is lift drive group 1, after the second isolation device 302a is disconnected, lift drive group 1 is divided into two groups of lift drive groups to be screened, one of which includes lift drive unit 201a and lift drive unit 201b, and the other includes lift drive unit 201c and lift drive unit 201d. For example, as shown in FIG17 , when the target lift drive group is lift drive group 1, after the second isolation device 302a is disconnected, lift drive group 1 is divided into two groups of lift drive groups to be screened, one of which includes lift drive unit 201a, and the other includes lift drive unit 201b and lift drive unit 201c.

[0142] In one embodiment, after the secondary fault is isolated, the first isolation device is controlled to close so that the lift drive group to be screened that is not connected to the power supply unit is 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.

[0143] In one embodiment, if a short circuit fault occurs in a lift drive group connected to a power supply unit and the lift drive group includes only one lift drive unit, the target lift drive unit is determined to be that lift drive unit. For example, as shown in FIG. 20 , the lift drive group includes only lift drive unit 201a.

[0144] In one embodiment, if a short circuit fault occurs in a lift drive group connected to a power supply unit, and the lift drive group includes at least two lift drive units, the third isolation device in the lift drive group with the short circuit fault is controlled to be disconnected, completing three-level fault isolation. This allows the target lift drive unit with the short circuit fault to be identified and isolated. For example, as shown in FIG18 , one lift drive group includes lift drive unit 201a and lift drive unit 201b, and another lift drive group includes lift drive unit 201c and lift drive unit 201d. If a short circuit fault occurs in the lift drive group 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 controlled to be disconnected, completing three-level fault isolation. In one embodiment, after three-level fault isolation, the second isolation device between the lift drive groups is controlled to be closed, allowing the remaining lift drive units, excluding the target lift drive unit, to continue operating. Exemplarily, as shown in FIG18 , the second isolation device 302 a is controlled to be closed.

[0145] In one embodiment, after step S24, the following further comprises: if a short circuit fault exists in the lift drive unit connected to the power supply unit, determining that the lift drive unit connected to the power supply unit is the target lift drive unit; and step S30 comprises: controlling the second 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 operation. For example, as shown in FIG20 , if a short circuit fault still exists in the line where lift drive unit 201a connected to the power supply unit is located, the target lift drive unit is determined to be lift drive unit 201a; and as shown in FIG21 , if a short circuit fault does not exist in the line where lift drive unit 201a connected to the power supply unit is located, the target lift drive unit is determined to be lift drive unit 201b.

[0146] In one embodiment, after controlling the disconnection of the third isolation device in the lift drive group to be screened that has a short-circuit fault, if the lift drive unit connected to the power supply unit does not have a short-circuit fault, the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and no power reconstruction is required at this time.

[0147] In one embodiment, 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 the other lift drive group to be screened is controlled to be disconnected, completing three-level fault isolation. For example, as shown in FIG19 , one lift drive group to be screened includes lift drive unit 201a and lift drive unit 201b, and the other lift drive group to be screened includes lift drive unit 201c and lift drive unit 201d. 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 303c on the line between lift drive unit 201c and lift drive unit 201d is controlled to be disconnected, completing three-level fault isolation. If the line connecting lift drive unit 201c to the power supply unit still has a short circuit fault, the target lift drive unit is determined to be lift drive unit 201c. If the line connecting lift drive unit 201c to the power supply unit does not have a short circuit fault, the target lift drive unit is determined to be lift drive unit 201d. In one embodiment, after the third-level fault is isolated, the second isolation device between the lift drive groups to be screened is controlled to close, so that the remaining lift drive units other than the target lift drive unit continue to operate. For example, as shown in FIG19 , the second isolation device 302 a is controlled to close.

[0148] In one embodiment, after step S24, the further step includes: if a short circuit fault occurs in a lift drive unit connected to the power supply unit, determining that a lift drive unit provided with a second isolation device on the line of another lift drive group to be screened is the target lift drive unit; and 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 to operate. In one embodiment, after the third isolation device 303c is controlled to be opened and the second isolation device 302a is controlled to be closed, if no short-circuit fault exists in the lift drive units connected to the power supply unit 101, that is, no short-circuit fault is detected in the lift drive unit 201a, the lift drive unit 201b, and the lift drive unit 201c, then the target lift drive unit with the short-circuit fault is determined to be the lift drive unit 201d; if a short-circuit fault exists in the lift drive units connected to the power supply unit 101, that is, a short-circuit fault is detected in the lift drive unit 201a, the lift drive unit 201b, and the lift drive unit 201c, since the possibility of the short-circuit fault in the lift drive unit 201a and the lift drive unit 201b has been ruled out before, the target lift drive unit with the short-circuit fault is the lift drive unit 201c.

[0149] In one embodiment, after controlling the second isolation device between the lift drive groups to be screened to be closed, if the lift drive unit connected to the power supply unit does not have a short circuit fault, the lift drive unit not connected to the power supply unit is determined to be the target lift drive unit, and power reconstruction is not required at this time.

[0150] 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 determined 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 a short-circuit fault is isolated, and power reconstruction is achieved by controlling the first isolation device and the second isolation device to ensure the normal operation of the flight drive system.

[0151] In the technical solution of this embodiment, the second isolation device 302 and the third isolation device 303 are controlled to be opened or closed, the target lift drive unit with a short-circuit fault is determined 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 201 with a short-circuit fault is isolated to ensure the normal operation of the flight drive system.

[0152] The present application also provides a flight drive system, which includes a memory, a processor, and a flight drive fault detection program stored in the memory and executable on the processor. When the flight drive fault detection program is executed by the processor, it implements the various steps of the flight drive fault detection method described in the above embodiment.

[0153] The present application also provides a computer-readable storage medium, which stores a flight drive fault detection program. When the flight drive fault detection program is executed by a processor, it implements the various steps of the flight drive fault detection method described in the above embodiment.

[0154] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0155] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, system, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, system, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, system, article, or device comprising the element.

[0156] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment system can be implemented by means of software plus the necessary general hardware platform, and of course it 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 application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, parking management equipment, air conditioner, or network equipment, etc.) to execute the system described in each embodiment of the present application.

[0157] The above are merely optional embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A flight drive system, wherein: The flight drive system comprises: At least two power supply units; At least two lift drive groups, each of which is connected in parallel and connected to the power supply unit, and the lift drive group includes a plurality of lift drive units; a first isolation device, the first isolation device being arranged on a line between adjacent lift drive groups; a second isolation device, the second isolation device being arranged on a line between at least two adjacent lift drive units in each lift drive group; A third isolation device is provided at least on a line between two adjacent lift driving units in each lift driving group other than the second isolation device.

2. The flight drive system according to claim 1, wherein: The second isolation device is arranged on a line between two adjacent lift driving units in the middle of each lift driving group.

3. The flight drive system according to claim 1, wherein: The second isolation device is arranged on a line of the lift driving unit located in the middle of each lift driving group and close to the power supply unit.

4. The flight drive system according to claim 1, wherein: The third isolating device and the second isolating device are arranged in parallel on a line between two adjacent lift driving units.

5. The flight drive system according to claim 4, wherein: The initial state of the second isolation device is an open state, and the initial state of the third isolation device arranged in parallel with the second isolation device is a closed state.

6. A method for detecting a flight drive fault, wherein: Applied to the flight drive system according to any one of claims 1 to 5, the flight drive fault detection method comprises: If a short circuit fault is detected in the flight drive system, the first isolation device is controlled to be disconnected to determine the target lift drive group with the short circuit fault; The second isolation device and the third isolation device are controlled to be opened or closed, so as to determine a target lift driving unit with a short circuit fault in the target lift driving group and isolate the target lift driving unit.

7. The flight drive fault detection method according to claim 6, wherein: After the step of controlling the opening or closing of the second isolation device and the third isolation device, the method further includes: The closing of the first isolation device and / or the second isolation device is controlled to allow the remaining lift driving units except the target lift driving unit to continue to operate.

8. The flight drive fault detection method according to claim 7, wherein: When the lift drive group 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 comprises: Controlling the third isolation device in the target lift driving group, which is connected in parallel with the second isolation device, to be disconnected, so as to divide the target lift driving group into two lift driving 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, determining the lift drive unit as the target lift drive unit; 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, the third isolation device in the lift drive group to be screened with the short circuit fault is controlled to be disconnected to determine the target lift drive unit with the short circuit fault, and isolate the target lift drive unit; The step of controlling the closing of the first isolation device and / or the second isolation device comprises: The first isolation device is controlled to be closed so that the lift drive group to be screened that is not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and the remaining lift drive units except the target lift drive unit are controlled to continue to operate.

9. The flight drive fault detection method according to claim 8, wherein: After the step of controlling the disconnection of the third isolation device on the line between two adjacent lift driving units in the target lift driving group, the method further includes: If the lift drive group to be screened connected to the power supply unit does not have a short circuit fault, controlling the third isolation device in another lift drive group to be screened to be disconnected; The step of controlling the closing of the first isolation device and / or the second isolation device comprises: The second isolation device between the lift driving groups to be screened is controlled to be closed, so that the remaining lift driving units except the target lift driving unit continue to operate.

10. The flight drive fault detection method according to claim 7, wherein: In each of the lift driving groups, only the second isolation device is provided on the line between two adjacent lift driving units in the middle, or the second isolation device is provided on the line of the lift driving unit in the middle of each of the lift driving groups close to the power supply unit, and the step of controlling the opening or closing of the second isolation device and the third isolation device comprises: Controlling the second isolation device in the target lift driving group to be disconnected, so as to divide the target lift driving group into two lift driving 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, determining the lift drive unit as the target lift drive unit; 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, the third isolation device in the lift drive group to be screened with the short circuit fault is controlled to be disconnected to determine the target lift drive unit with the short circuit fault, and isolate the target lift drive unit; The step of controlling the closing of the first isolation device and / or the second isolation device comprises: The first isolation device is controlled to be closed so that the lift drive group to be screened that is not connected to the power supply unit is reconnected to the power supply unit of another lift drive group, and the remaining lift drive units except the target lift drive unit are controlled to continue to operate.

11. The flight drive fault detection method according to claim 10, wherein: After the step of controlling the second isolation device in the target lift driving group to disconnect, the method further includes: If the lift drive group to be screened connected to the power supply unit does not have a short circuit fault, controlling the corresponding third isolation device in another lift drive group to be screened to be disconnected; The step of controlling the closing of the first isolation device and / or the second isolation device comprises: The second isolation device between the lift driving groups to be screened is controlled to be closed, so that the remaining lift driving units except the target lift driving unit continue to operate.

12. The flight drive fault detection method according to claim 8 or 10, wherein: After the step of controlling the third isolation device in the lift drive group to be screened that has a short-circuit fault to be disconnected, the method further includes: If a short circuit fault occurs in the lift driving unit connected to the power supply unit, determining the lift driving unit connected to the power supply unit as the target lift driving unit; The step of controlling the closing of the first isolation device and / or the second isolation device comprises: The second isolation device is controlled to be closed so that the lift driving unit not connected to the power supply unit is reconnected to the power supply unit of another lift driving group, and the remaining lift driving units except the target lift driving unit are controlled to continue to operate.

13. The flight drive fault detection method according to claim 8 or 10, wherein: After the step of controlling the third isolation device in the lift drive group to be screened that has a short-circuit fault to be disconnected, the method further includes: If the lift driving unit connected to the power supply unit does not have a short circuit fault, then the lift driving unit not connected to the power supply unit is determined as the target lift driving unit.

14. The flight drive fault detection method according to claim 9 or 11, wherein: After the step of controlling the closing 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 driving unit connected to the power supply unit, a lift driving unit provided with a second isolation device on another lift driving group line to be screened is determined as the target lift driving unit; The step of controlling the closing of the first isolation device and / or the second isolation device comprises: The first isolation device is controlled to be closed, so that the lift driving unit that is not connected to the power supply unit is reconnected to the power supply unit of another lift driving group, and the remaining lift driving units except the target lift driving unit are controlled to continue to operate.

15. The flight drive fault detection method according to claim 9 or 11, wherein: After the step of controlling the closing of the second isolation device between the lift drive groups to be screened, the method further includes: If the lift driving unit connected to the power supply unit does not have a short circuit fault, then the lift driving unit not connected to the power supply unit is determined as the target lift driving unit.

16. A flight drive system, wherein: 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 the flight drive fault detection program is executed by the processor, the various steps of the flight drive fault detection method as described in any one of claims 6-15 are implemented.

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