Control device applied to airplane lip anti-icing

Abstract

The invention belongs to the technical field of aviation electrics, and particularly relates to a control device applied to airplane lip ice prevention. Comprising a discrete quantity acquisition module, an analog quantity acquisition module, a PWM module, a driving module, a power switch module, an MCU module, a data storage module, an alarm module and a communication module, wherein the power switch module comprises a primary power switch and a secondary power switch; wherein the discrete magnitude acquisition module acquires an anti-icing manual signal and an anti-icing automatic signal which are externally input; the analog quantity acquisition module acquires externally input temperature sensor signals and partition current signals; the PMW module, the driving module and the power switch module distribute externally input three-phase AC 115V / 400Hz power supply signals to voltage signals required by independent work of the subarea [1,..., n]; the MCU module performs logic judgment and processing on the information; the data storage module stores state information and alarm information. The method has the advantages of redundancy design, optimal control, state acquisition and hierarchical regulation and control.

Description

Technical Field

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

[0002] When an aircraft flies under icing weather conditions, icing may occur, especially icing of the lip, which affects flight safety. The control device is used to prevent the engine lip from icing when operating under icing conditions. Existing control devices have problems such as insufficient redundancy design, unreasonable 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 ungraded 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 acquires the anti-icing manual signal and the anti-icing automatic signal input externally;

[0007] The analog quantity acquisition module acquires the external input temperature sensor signal and partition current signal;

[0008] The PMW module, the drive module and the power switch module distribute the externally input three-phase AC 115V / 400Hz power supply signal to the voltage signal required for the independent operation of the partition [1,…,n];

[0009] The MCU module, as a logic control unit, is connected with 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 the information interaction between the integrated management computer and the MCU module.

[0012] Furthermore, the alarm module includes a primary alarm output and a secondary 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 and status of temperature sensors, 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 switch failure, first-level power switch circuit breaker fault, second-level power switch circuit breaker fault, and communication transmission failure.

[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 control device for aircraft lip anti-icing of the present invention collects external input anti-icing manual signals and anti-icing automatic signals through a discrete quantity acquisition module; collects external input temperature sensor PT[1,…,2n] signals and partition current I[1,…,3n] signals through an analog quantity acquisition module; converts external input DC28V power supply signals into different voltage signals required for the operation of each module inside the control device through a voltage conversion module; distributes external input three-phase AC115V / 400Hz power supply signals to voltage signals required for independent operation of partitions [1,…,n] through a PMW module, a drive module and a power switch module; the MCU module is connected with other modules (except the PMW module and the drive module) as a logic control unit to perform logical judgment and processing of information; stores state information and alarm information through a data storage module; outputs a first-level alarm signal and a second-level alarm signal through an alarm module; and performs information exchange with a comprehensive management computer through a communication module. It has the advantages of redundant design, optimized control, state acquisition and hierarchical regulation, and has good practical application value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure 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 insufficient redundancy design, unreasonable control logic, incomplete state collection, and non-grading of alarm output in existing control devices.

[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 signal required for independent operation of partition [1,…,n] through the PMW module, the drive module and the power switch module; the MCU module is used as a logic control unit and is connected with other modules (except the PMW module and the drive module) to perform logical judgment and processing of information; the status information and alarm information are stored through the data storage module; the first-level alarm signal and the second-level alarm signal are output through the alarm module; and information interaction is carried out with the integrated management computer through the communication module.

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

[0029] The present invention also 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 also 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] In the present invention, a data storage module is also included. The data storage module is connected to the MCU module and is used to store the temperature and status of the temperature sensor, the partition current and status, the control device status, the software version, the anti-icing automatic signal, the anti-icing manual signal, the atmospheric temperature, the altitude, the indicated airspeed, the time, the wheel load signal, the icing signal, the maintenance instruction, the valid bit, and the alarm information, so as to facilitate the use of the control rate optimization and the fault analysis.

[0032] In the present invention, a communication module is also included, and the communication module 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 the temperature and state of the temperature sensor, the partition current and state, the control device state, the software version, the anti-icing automatic signal, the anti-icing manual signal, and the alarm information; the information sent by the integrated management computer to the communication module includes the atmospheric temperature, altitude, indicated airspeed, time, wheel load signal, icing signal, maintenance instruction, and valid bit. The fully collected state interaction signal is easy to judge the health status of the anti-icing device, improves the fault detection rate and isolation rate, and shortens the maintenance time.

[0033] The present invention also includes an alarm module, which is connected to the MCU module and is divided into a primary alarm signal and a secondary alarm signal, so as to realize hierarchical control of the alarm signal and facilitate the formulation of targeted response measures.

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

[0035] A secondary alarm will be issued 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.

[0036] When any temperature of 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 of any partition exceeds the set over-temperature threshold (90°C, which can be adjusted according to actual working conditions), and the working current of the partition is detected to be greater than the minimum threshold (1A, which can be adjusted according to actual working conditions), the MCU module will cut off the primary power switch of the partition and issue a primary alarm. The primary power switch is used as an over-control operation when there is an over-temperature current fault, and cuts off the voltage output of the partition.

[0038] When the collected current of any phase of 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 of any phase of any partition exceeds the maximum threshold (1.2 times the rated current, which can be adjusted according to the actual working conditions), after the MCU module cuts off the secondary power switch of the partition, it still detects that the working current of the partition is greater than the minimum threshold (1A, which can be adjusted according to the actual working conditions), then the MCU module cuts off the primary power switch of the partition and issues a primary alarm at the same time. The primary power switch is used as an overcontrol operation when the partition overcurrent switch fails continuously, and cuts off the voltage output of the partition. In the present invention, it also includes a drive module and a PWM module, the common end of the drive module and the PWM module is connected to the external input anti-icing manual signal, and the other end is respectively connected to the primary power switch and the secondary power switch, which is used to realize 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 for heating logic judgment, directly connects the primary power switch of the power switch module, and connects the secondary power switch according to the established PWM duty cycle to realize the voltage output of the partition [1,…,n]. The manual anti-icing mode is a redundant design of the automatic anti-icing mode, which effectively reduces the anti-icing failure rate.

[0040] In the present invention, an MCU module is also included, and the MCU module is connected to other modules (except the drive module and the PWM module) for performing logical judgment and processing of information. In the automatic anti-icing mode, the MCU module relies on the temperature value of the temperature sensor of the partition to perform heating logic judgment. When the temperature of any temperature sensor in each partition is less than the lower limit threshold of the heating control temperature range (20°C, which can be adjusted according to the actual working conditions), the primary power switch and the secondary power switch of the power switch module are turned on to realize the voltage output of the corresponding partition.

[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 primary power switch and secondary power switch. The discrete quantity acquisition module acquires the anti-icing manual signal and the anti-icing automatic signal input externally; The analog quantity acquisition module acquires the external input temperature sensor signal and partition current signal; The PMW module, the drive module and the power switch module distribute the externally input three-phase AC 115V / 400Hz power supply signal to the voltage signal required for the independent operation of the partition [1,…,n]; The MCU module, as a logic control unit, is connected with 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 the information interaction between the integrated management computer and the MCU module.

2. The control device for aircraft lip anti-icing according to claim 1, characterized in that: The alarm module includes primary alarm output and secondary 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 and status of temperature sensors, 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.

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 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.

8. The control device for aircraft lip anti-icing according to claim 1, 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 1, 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, a secondary alarm is issued; when the partition overcurrent switch fails continuously, the primary power switch of the partition is cut off, and a primary alarm is issued.

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