A control device for aircraft lip anti-icing

Abstract

The present invention belongs to the field of aviation electrical technology, specifically relating to a control device for aircraft lip anti-icing. It comprises a discrete quantity acquisition module, an analog quantity acquisition module, a PWM module, a driver module, a power switch module, an MCU module, a data storage module, an alarm module, and a communication module. The power switch module includes a primary power switch and a secondary power switch. The discrete quantity acquisition module acquires externally input manual and automatic anti-icing signals; the analog quantity acquisition module acquires externally input temperature sensor signals and partition current signals; the PWM module, driver module, and power switch module distribute externally input three-phase AC 115V / 400Hz power signals to the voltage signals required for independent operation of partitions [1,…,n]; the MCU module performs logical judgment and processing of information; and the data storage module stores status and alarm information. This device has the advantages of redundant design, optimized control, status acquisition, and hierarchical regulation.

Description

Technical Field

[0001] The present invention belongs to the field of aviation electrical technology, and in particular relates to a control device for anti-icing of an aircraft lip. Background Art

[0002] When an aircraft flies in icing conditions, icing may occur, particularly on the lip, compromising flight safety. Control devices are designed to prevent ice from forming on the engine lip when operating in icing conditions. Existing control devices suffer from issues such as insufficient redundancy, illogical control logic, incomplete status collection, and ungraded alarm output. Summary of the Invention

[0003] Purpose of the invention: To provide a control device for aircraft lip anti-icing, aiming to solve the problems of insufficient redundancy design, unreasonable control logic, incomplete status collection, and non-graded alarm output in existing control devices.

[0004] Technical solution:

[0005] A control device for aircraft lip anti-icing includes a discrete quantity acquisition module, an analog quantity acquisition module, a PWM module, a drive module, a power switch module, an MCU module, a data storage module, an alarm module, and a communication module. The power switch module includes a primary power switch and a secondary power switch.

[0006] The discrete quantity acquisition module collects the external input anti-icing manual signal and anti-icing automatic signal;

[0007] The analog acquisition module collects external input temperature sensor signals and partition current signals;

[0008] The PMW module, drive module and power switch module distribute the external input three-phase AC115V / 400Hz power signal to the voltage signal required for the independent operation of partitions [1,…,n];

[0009] The MCU module serves as a logic control unit and is connected to the power switch module, data storage module, alarm module, communication module, discrete quantity acquisition module, and analog quantity acquisition module to perform logical judgment and processing of information;

[0010] The data storage module stores status information and alarm information; the alarm module outputs alarm signals;

[0011] The communication module is used to realize information interaction between the integrated management computer and the MCU module.

[0012] Furthermore, the alarm module includes a first-level alarm output and a second-level alarm output.

[0013] Furthermore, two temperature sensors are arranged in each partition to detect the temperature of the partition; and each partition detects three-phase current.

[0014] Furthermore, the voltage conversion module is used to convert the external input DC28V power supply signal into different voltage signals required for the operation of each module inside the control device.

[0015] Furthermore, the communication module is used to send information including temperature sensor temperature and status, partition current and status, control device status, software version, anti-icing automatic signal, anti-icing manual signal, and alarm information to the integrated management computer; the integrated management computer is used to send information including atmospheric temperature, altitude, indicated airspeed, time, wheel load signal, icing signal, maintenance instructions, and valid bits to the communication module.

[0016] Furthermore, the alarm module is used to issue a first-level alarm when any of the following faults occurs: over-temperature current fault, partition overcurrent fault, first-level power switch circuit breaker fault, second-level power switch circuit breaker fault, and communication transmission fault.

[0017] Furthermore, the alarm module is used to issue a secondary alarm when any of the following faults occurs: temperature sensor fault, over-temperature fault, over-current fault, data storage fault, secondary power switch short circuit fault, and communication reception fault.

[0018] Furthermore, the MCU module is used to cut off the secondary power switch of the partition when an over-temperature fault occurs, so that the working current of the partition is zero, and at the same time, a secondary alarm is issued;

[0019] When over-temperature and current fault occur, the first-level power switch of the partition is cut off and a first-level alarm is issued at the same time.

[0020] Furthermore, the MCU module is used to cut off the secondary power switch of the partition when an overcurrent fault occurs, so that the working current of the partition is zero, and at the same time, a secondary alarm is issued;

[0021] When the partition overcurrent switch fails continuously, the first-level power switch of the partition is cut off and a first-level alarm is issued at the same time.

[0022] Beneficial effects:

[0023] The present invention's control device for aircraft lip anti-icing uses a discrete quantity acquisition module to collect externally input manual and automatic anti-icing signals; an analog quantity acquisition module to collect externally input temperature sensor PT[1,…,2n] signals and partition current I[1,…,3n] signals; a voltage conversion module to convert externally input DC28V power signals into different voltage signals required for the operation of various modules within the control device; a PMW module, a driver module, and a power switch module to distribute externally input three-phase AC115V / 400Hz power signals to the voltage signals required for independent operation of partitions [1,…,n]; an MCU module, serving as a logic control unit, connects to other modules (except the PMW module and the driver module) to perform logical judgment and processing of information; a data storage module to store status and alarm information; an alarm module to output primary and secondary alarm signals; and a communication module to exchange information with an integrated management computer. This device has advantages such as redundant design, optimized control, status acquisition, and hierarchical regulation, and possesses promising practical application value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 2 is a schematic diagram of a control device for aircraft lip anti-icing according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention provides a control device for aircraft lip anti-icing, aiming to solve the problems of existing control devices such as insufficient redundancy design, unreasonable control logic, incomplete status collection, and non-graded alarm output.

[0026] like Figure 1 As shown, a control device for aircraft lip anti-icing includes a discrete quantity acquisition module, an analog quantity acquisition module, a voltage conversion module, a PWM module, a drive module, a power switch module (including a primary power switch and a secondary power switch), an MCU module, a data storage module, an alarm module (including a primary alarm output and a secondary alarm output) and a communication module.

[0027] The external input anti-icing manual signal and anti-icing automatic signal are collected through the discrete quantity acquisition module; the external input temperature sensor PT[1,…,2n] signal and partition current I[1,…,3n] signal are collected through the analog quantity acquisition module; the external input DC28V power supply signal is converted into different voltage signals required for the operation of each module inside the control device through the voltage conversion module; the external input three-phase AC115V / 400Hz power supply signal is distributed to the voltage signals required for independent operation of partition [1,…,n] through the PMW module, drive module and power switch module; the MCU module serves as a logical control unit and is connected to other modules (except the PMW module and drive module) to perform logical judgment and processing of information; the data storage module stores status information and alarm information; the alarm module outputs the first-level alarm signal and the second-level alarm signal; and the communication module exchanges information with the integrated management computer.

[0028] The analog acquisition module is connected to the MCU module and is used to collect temperature and current signals [1,…,3n] from temperature sensors [1,…,2n] arranged in partitions [1,…,n]. Two temperature sensors are arranged in each partition to detect the temperature of the partition; each partition detects three-phase current.

[0029] The present invention further includes a discrete quantity acquisition module, which is connected to the MCU module and is used to collect externally input anti-icing manual signals and anti-icing automatic signals as inputs for starting anti-icing.

[0030] The present invention further includes a voltage conversion module, which is used to convert the external DC28V power supply signal into the voltage signal (3.3V, 5V, ±15V) required for the operation of each module inside the control device.

[0031] The present invention also includes a data storage module, which is connected to the MCU module and is used to store temperature and status of temperature sensors, partition current and status, control device status, software version, anti-icing automatic signal, anti-icing manual signal, atmospheric temperature, altitude, indicated airspeed, time, wheel load signal, icing signal, maintenance instructions, valid bit, and alarm information, so as to facilitate control rate optimization and fault analysis.

[0032] The present invention also includes a communication module, which is connected to the MCU module and the integrated management computer for information exchange. The information sent by the communication module to the integrated management computer includes temperature sensor temperature and status, zone current and status, control device status, software version, automatic anti-icing signal, manual anti-icing signal, and alarm information. The integrated management computer also sends information to the communication module including atmospheric temperature, altitude, indicated airspeed, time, wheel load signal, icing signal, maintenance instructions, and valid bits. The comprehensive collection of status interaction signals facilitates the determination of the health of the anti-icing system, improves fault detection and isolation rates, and shortens maintenance time.

[0033] The present invention also includes an alarm module, which is connected to the MCU module and is divided into a first-level alarm signal and a second-level alarm signal, thereby realizing hierarchical control of the alarm signal and facilitating the formulation of targeted response measures.

[0034] A level 1 alarm is issued when any of the following faults occurs: over-temperature current fault, partition over-current switch failure, level 1 power switch circuit breaker failure, level 2 power switch circuit breaker failure, communication transmission failure.

[0035] A secondary alarm will be issued when any of the following faults occurs: temperature sensor fault, over-temperature fault, over-current fault, data storage fault, secondary power switch short circuit fault, and communication reception fault.

[0036] When any temperature in any partition exceeds the set over-temperature threshold (90°C, which can be adjusted according to actual working conditions), the MCU module cuts off the secondary power switch of the partition, making the working current of the partition zero, and issues a secondary alarm at the same time;

[0037] If any temperature in any zone exceeds the set over-temperature threshold (90°C, adjustable based on actual operating conditions) and the operating current in that zone exceeds the minimum threshold (1A, adjustable based on actual operating conditions), the MCU module disconnects the primary power switch in that zone and issues a level 1 alarm. The primary power switch acts as an override for over-temperature and current fault conditions, shutting off the voltage output in that zone.

[0038] When the collected current of any phase in any partition exceeds the maximum threshold (1.2 times the rated current, which can be adjusted according to the actual working conditions), the MCU module cuts off the secondary power switch of the partition, making the working current of the partition zero, and issues a secondary alarm at the same time;

[0039] When the collected current in any phase of any partition exceeds the maximum threshold (1.2 times the rated current, adjustable based on actual operating conditions), the MCU module disconnects the partition's secondary power switch. If the partition's operating current still exceeds the minimum threshold (1A, adjustable based on actual operating conditions), the MCU module disconnects the partition's primary power switch and simultaneously issues a level 1 alarm. The primary power switch acts as an override in the event of a partition overcurrent fault, shutting off the partition's voltage output. The present invention also includes a driver module and a PWM module. The common terminal of the driver and PWM modules is connected to an externally input manual anti-icing signal, and the other terminals are connected to the primary and secondary power switches, respectively, to implement a manual anti-icing function. In manual anti-icing mode, the MCU module does not rely on the temperature value of the partition's temperature sensor to perform heating logic judgment. Instead, it directly connects the power switch module's primary power switch and the secondary power switch according to the predetermined PWM duty cycle to achieve voltage output for partitions [1,…,n]. Manual anti-icing mode, as a redundant design for automatic anti-icing mode, effectively reduces the rate of anti-icing failures.

[0040] The present invention also includes an MCU module, which is connected to other modules (except the driver module and PWM module) to perform logical judgment and information processing. In automatic anti-icing mode, the MCU module uses the temperature values of the zone temperature sensors to perform heating logic judgment. When the temperature of any temperature sensor in each zone is below the lower limit of the heating control temperature range (20°C, which can be adjusted according to actual operating conditions), the primary and secondary power switches of the power switch module are turned on to achieve voltage output for the corresponding zone.

[0041] When the temperature of any temperature sensor in each partition is greater than the upper limit threshold of the heating control temperature range (40°C, which can be adjusted according to actual working conditions), the secondary power switch of the power switch module is disconnected.

Claims

1. A control device for aircraft lip anti-icing, characterized in that: It includes discrete quantity acquisition module, analog quantity acquisition module, PWM module, drive module, power switch module, MCU module, data storage module, alarm module and communication module. The power switch module includes a primary power switch and a secondary power switch. The discrete quantity acquisition module collects the external input anti-icing manual signal and anti-icing automatic signal; The analog acquisition module collects external input temperature sensor signals and partition current signals; The PMW module, drive module and power switch module distribute the external input three-phase AC115V / 400Hz power signal to the voltage signal required for the independent operation of partitions [1,…,n]; The MCU module serves as a logic control unit and is connected to the power switch module, data storage module, alarm module, communication module, discrete quantity acquisition module, and analog quantity acquisition module to perform logical judgment and processing of information; The data storage module stores status information and alarm information; the alarm module outputs alarm signals; The communication module is used to realize information interaction between the integrated management computer and the MCU module; The common end of the driver module and the PWM module is connected to the external input manual anti-icing signal, and the other end is connected to the primary power switch and the secondary power switch, respectively, to implement the manual anti-icing function. In the manual anti-icing mode, the MCU module does not rely on the temperature value of the temperature sensor of the partition to perform heating logic judgment, but directly turns on the primary power switch of the power switch module and turns on the secondary power switch according to the established PWM duty cycle to achieve voltage output for the partition [1, ..., n]. In automatic anti-icing mode, the MCU module relies on the temperature values of the temperature sensors in each zone to perform heating logic judgment. When the temperature of any temperature sensor in each zone is lower than the lower limit threshold of the heating control temperature range, the primary and secondary power switches of the power switch module are turned on to realize voltage output for the corresponding zone. When the temperature of any temperature sensor in each partition is greater than the upper limit threshold of the heating control temperature range, the secondary power switch of the power switch module is disconnected.

2. The control device for aircraft lip anti-icing according to claim 1, characterized in that: The alarm module includes level one alarm output and level two alarm output.

3. The control device for aircraft lip anti-icing according to claim 2, characterized in that: Two temperature sensors are arranged in each partition to detect the temperature of the partition; each partition detects the three-phase current.

4. The control device for aircraft lip anti-icing according to claim 3, characterized in that: The voltage conversion module is used to convert the external input DC28V power signal into different voltage signals required for the operation of each module inside the control device.

5. The control device for aircraft lip anti-icing according to claim 4, characterized in that: The communication module is used to send information including temperature sensor temperature and status, partition current and status, control device status, software version, anti-icing automatic signal, anti-icing manual signal, and alarm information to the integrated management computer; the integrated management computer is used to send information including atmospheric temperature, altitude, indicated airspeed, time, wheel load signal, icing signal, maintenance instructions, and valid bit to the communication module.

6. The control device for aircraft lip anti-icing according to claim 5, characterized in that: The alarm module is used to issue a first-level alarm when any of the following faults occurs: over-temperature current fault, partition over-current switch failure, first-level power switch circuit breaker fault, second-level power switch circuit breaker fault, and communication transmission failure.

7. The control device for aircraft lip anti-icing according to claim 6, characterized in that: The alarm module is used to generate a secondary alarm when any of the following faults occur: temperature sensor fault, over-temperature fault, over-current fault, data storage fault, secondary power switch short circuit fault, and communication reception fault.

8. The control device for aircraft lip anti-icing according to claim 7, characterized in that: The MCU module is used to cut off the secondary power switch of the partition when an over-temperature fault occurs, making the working current of the partition zero and issuing a secondary alarm at the same time; when an over-temperature current fault occurs, it cuts off the primary power switch of the partition and issues a primary alarm at the same time.

9. The control device for aircraft lip anti-icing according to claim 7, characterized in that: The MCU module is used to cut off the secondary power switch of the partition when an overcurrent fault occurs, so that the working current of the partition is zero, and at the same time issue a secondary alarm; when the partition overcurrent switch fails continuously, it cuts off the primary power switch of the partition and at the same time issues a primary alarm.

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