Stability augmentation control device of main and standby modes

Abstract

The invention provides a main / standby mode stability augmentation control device, which comprises two groups of stability augmentation control modules, one of the two groups of stability augmentation control modules is a stability augmentation control main channel, and the other one of the two groups of stability augmentation control modules is a stability augmentation control standby channel; the stability augmentation control main channel and the stability augmentation control main channel realize mutual switching of working channels through data interaction; each of the stability augmentation control main channel and the stability augmentation control standby channel comprises an instruction branch and a monitoring branch; the instruction branch circuit is used for receiving a sensor signal and outputting a first switch instruction through the instruction branch circuit, the monitoring branch circuit is used for receiving the sensor signal and generating a second switch instruction through the monitoring branch circuit, and when the first switch instruction is consistent with the switch instruction, an EHSV driving current is output. And the safety of the stability augmentation control system is enhanced through the stability augmentation control device in the main and standby modes.

Description

Technical Field

[0001] The present invention relates to the technical field of avionics equipment, and in particular to a stabilization control device in a primary-standby mode. Background Art

[0002] When the fly-by-wire flight control system and analog backup fail for special aircraft, the mechanical backup alone cannot complete the heading control of the aircraft, so the stability augmentation control device is used to assist the pilot in completing the heading control in the mechanical backup mode. By adding heading stability augmentation control to the lower rudder control loop, lateral acceleration and yaw rate are introduced to improve Dutch roll damping and improve heading static stability.

[0003] The stabilization control device collects the aircraft's yaw rate through a fiber optic gyro and the aircraft's lateral acceleration through an accelerometer. After calculation by the control law, it outputs the corresponding control command, which is amplified by the servo drive and converted into a drive current to the electro-hydraulic servo valve to complete the stabilization control of the lower rudder. At the same time, the stabilization control device is also the management component of the stabilization system, responsible for the redundancy management and logical judgment of the entire system, the conversion of working modes, and the realization of system status reporting, fault alarm and the BIT function of the entire stabilization system.

[0004] The stability augmentation control device is a core component of the mechanical backup flight control system, and its availability is of vital importance. If the stability augmentation control system fails during the mechanical backup control process, the aircraft will experience a Dutch roll divergence, making the aircraft uncontrollable. Summary of the invention

[0005] In view of this, the embodiments of this specification provide a stabilization control device in a primary and secondary mode to achieve the purpose of enhancing the safety of the stabilization control system.

[0006] The embodiments of this specification provide the following technical solutions:

[0007] A stabilization control device in a main and standby mode, comprising:

[0008] Two groups of stabilization control modules, wherein one group of the two groups of stabilization control modules is a main stabilization control channel, and the other group of the two groups of stabilization control modules is a backup stabilization control channel;

[0009] The main channel of the stabilization control realizes the mutual switching of the working channels through data interaction with the main channel of the stabilization control;

[0010] The main channel of the stability augmentation control and the backup channel of the stability augmentation control both include a command branch and a monitoring branch;

[0011] The command branch is used to receive the sensor signal and output the first switch indication through the command branch. The monitoring branch is used to receive the sensor signal and generate the second switch indication through the monitoring branch. When the first switch indication and the second switch indication are consistent, the EHSV drive current is output.

[0012] Furthermore, the instruction branch and the monitoring branch both include:

[0013] Sensor acquisition unit, control law calculation unit, fault monitoring unit and cross-channel monitoring unit;

[0014] Collecting a plurality of sensor data through a sensor acquisition unit, and inputting the plurality of sensor data into a control law calculation unit;

[0015] The control law calculation unit calculates the sensor data and generates a digital control command signal;

[0016] The cross-channel monitoring unit is used to monitor the consistency of the digital control command signal of the command branch and the digital control command signal of the monitoring branch;

[0017] The fault monitoring unit is used to monitor various faults in the branch where the fault monitoring unit is located.

[0018] Furthermore, the monitoring branch also includes:

[0019] Servo drive unit;

[0020] The servo drive unit is used to convert the digital control command signal into an EHSV drive current, and output the EHSV drive current to the electro-hydraulic servo valve.

[0021] Furthermore, the monitoring branch also includes:

[0022] Integrated warning unit;

[0023] The integrated warning unit is used to output an alarm signal when the digital control command signal of the command branch is inconsistent with the digital control command signal of the monitoring branch.

[0024] Furthermore, the cross-channel monitoring unit is also used to notify the comprehensive warning unit when the digital control command signal of the command branch and the digital control command signal of the monitoring branch are inconsistent.

[0025] Furthermore, the fault monitoring unit comprises:

[0026] and value monitoring, model monitoring and self-monitoring;

[0027] The sum value monitoring is used to monitor the validity of the sensor signal of the branch where the sum value monitoring is located;

[0028] Model monitoring is used to determine whether the sensor signal after AD conversion meets the requirements or needs of the predetermined model;

[0029] Self-monitoring is used to monitor faults in the branch where the self-monitoring is located.

[0030] Furthermore, the fault monitoring unit further comprises:

[0031] Comparative monitoring;

[0032] Comparative monitoring is used to compare the sensor signals of the command branch and the monitoring branch;

[0033] If the sensor signal of the command branch is consistent with the sensor signal of the comparison monitoring, the sensor signal is transmitted to the control law.

[0034] Furthermore, the instruction branch and the monitoring branch also include:

[0035] Channel fault logic;

[0036] Channel fault logic is used to control the output switching indication via fault logic.

[0037] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0038] The single channel of the active / standby mode stability augmentation control device adopts the working mode of command / monitoring branch comparison monitoring, thereby improving the fault detection coverage, enhancing the fault tolerance capability of the whole machine, and achieving high integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a system structure block diagram of the stabilization control device in the main and standby modes according to an embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of the working principle of the active-standby mode stabilization control device system of an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] like Figure 1 and Figure 2 As shown, a stabilization control device in a main and standby mode comprises:

[0045] Two groups of stabilization control modules, wherein one of the two groups of stabilization control modules is a main stabilization control channel, and the other group of stabilization control modules is a backup stabilization control channel. The main stabilization control channel and the main stabilization control channel realize mutual switching of working channels through data interaction.

[0046] Both the main channel of the stabilization control and the backup channel of the stabilization control include a command branch and a monitoring branch. The command branch is used to receive the sensor signal and output a first switch indication through the command branch. The monitoring branch is used to receive the sensor signal and generate a second switch indication through the monitoring branch. When the first switch indication and the second switch indication are consistent, the EHSV drive current is output.

[0047] Both the command branch and the monitoring branch include:

[0048] Sensor acquisition unit, control law calculation unit, fault monitoring unit and cross-channel monitoring unit. The sensor acquisition unit collects multiple sensor data and inputs the multiple sensor data into the control law calculation unit. The control law calculation unit calculates the sensor data and generates a digital control command signal. The cross-channel monitoring unit is used to monitor the consistency of the digital control command signal of the command branch and the digital control command signal of the monitoring branch.

[0049] The fault monitoring unit is used to monitor various faults in the branch where the fault monitoring unit is located.

[0050] The monitoring branch also includes: a servo drive unit;

[0051] The servo drive unit is used to convert the digital control command signal into an EHSV drive current, and output the EHSV drive current to the electro-hydraulic servo valve. Furthermore, the monitoring branch also includes: a comprehensive warning unit. The comprehensive warning unit is used to output an alarm signal when the digital control command signal of the command branch is inconsistent with the digital control command signal of the monitoring branch.

[0052] The cross-channel monitoring unit is also used to notify the integrated warning unit when the digital control command signal of the command branch is inconsistent with the digital control command signal of the monitoring branch.

[0053] The fault monitoring unit includes:

[0054] Sum value monitoring, model monitoring and self-monitoring. Sum value monitoring is used to check the validity of the sensor signal of the branch where the sum value monitoring is located. Model monitoring is used to determine whether the sensor signal after AD conversion meets the requirements or needs of the predetermined model. Self-monitoring is used to monitor the fault of the branch where the self-monitoring is located.

[0055] The fault monitoring unit also includes: comparison monitoring. The comparison monitoring is used to compare the sensor signals of the command branch and the monitoring branch. If the sensor signal of the command branch is consistent with the sensor signal of the comparison monitoring, the sensor signal is transmitted to the control law.

[0056] The command branch and the monitoring branch also include: channel fault logic, and the channel fault logic is used to control the output switch indication through the fault logic.

[0057] Specifically, the main and standby modes of the stabilization control device use two channels: a main stabilization control channel and a standby stabilization control channel ( Figure 1 The left and right parts of the system determine their own working status according to the results of the monitoring logic (self-monitoring and comparative monitoring) in a single channel (main channel and backup channel respectively). If the main channel is in a normal state, the main channel is used as the working channel. If the main channel is in an abnormal state and the backup channel is in a normal state, the system automatically switches to the backup channel. The main and backup channels obtain their respective working status from each other through the data exchange function.

[0058] The command branch / monitoring branch comparison monitoring working mode is adopted in a single channel, thereby improving the fault detection coverage and enhancing the fault tolerance capability of the whole machine.

[0059] As a core component of the mechanical backup flight control system, the stability augmentation control device with active and standby modes is of vital importance in terms of availability. If the stability augmentation control system fails during the mechanical backup control process, the aircraft will experience Dutch roll divergence, making it impossible to control the aircraft. Therefore, even in the mechanical backup mode, the stability augmentation control system still adopts a dual-dual redundancy configuration. The command / monitoring branch comparison monitoring working mode is adopted in a single channel, thereby improving the fault detection coverage, enhancing the fault tolerance capability of the entire aircraft, and achieving high integrity.

[0060] The stabilization control device of the main and standby modes of the present invention collects the yaw rate (sensor signal) of the aircraft through the fiber optic gyroscope (sensor), collects the lateral acceleration (sensor signal) of the aircraft through the accelerometer, and then calculates the control law, outputs the corresponding digital control command signal, and outputs the digital control command signal after consistency monitoring by the cross channel monitoring unit. The digital control command signal is amplified by the servo drive unit and converted into the EHSV drive current output electro-hydraulic to the servo valve to complete the stabilization control of the lower rudder.

[0061] At the same time, the stability augmentation control device is also the management component of the stability augmentation system, responsible for the redundancy management and logical judgment of the entire system, working mode conversion, and realizing system status reporting, fault alarm and BIT functions of the entire control system.

[0062] The command branch and monitoring branch of the stabilization control device with active and standby modes collect (sensor signals). Both the command branch and the monitoring branch calculate the control law, and the two branches work synchronously. Both the command branch and the monitoring branch perform sensor ( Figure 2 Fault monitoring unit) and value monitoring, comparison monitoring, model monitoring and self-monitoring. And value monitoring is used for the validity detection of the sensor signal of this channel (sensor signal before AD conversion. Model monitoring is used to check whether the sensor signal after AD conversion meets the requirements or needs of the predetermined model. Self-monitoring is used for faults of this branch. The command branch and the monitoring branch cross-transmit the digital control command signals of each level of monitoring surface calculated by the control law calculation unit, and monitor the consistency of the digital control command signals calculated by the control law calculation unit through the cross-channel monitoring unit. When the vote is consistent, the digital control command signals calculated by the sensor signal are output as EHSV drive current through the servo drive unit. The command branch outputs the switch indication through the channel fault logic control of this channel, and the monitoring branch outputs the switch indication through the channel fault logic control of this channel. When the vote is consistent, the drive current is output. Comparison monitoring is used to compare whether the sensor signals after AD conversion of the command branch and the monitoring branch are consistent. If the two are consistent, the sensor signal is transmitted to the control law calculation unit for processing. If they are inconsistent, an alarm signal is output through the comprehensive alarm unit.

[0063] Beneficial effects of the embodiments of the present invention:

[0064] The active-standby mode stabilization control device of the embodiment of the present invention adopts a command / monitoring branch comparison monitoring working mode in a single channel, thereby improving the fault detection coverage, enhancing the fault tolerance capability of the whole machine, and achieving high integrity; the active-standby mode stabilization control device adopts two channels, namely, the active and standby channels, and adopts a command / monitoring branch comparison monitoring working mode in a single channel, thereby improving the fault detection coverage, enhancing the fault tolerance capability of the whole machine; the stabilization control device adopting a 2×2 redundancy configuration has strong electrical and physical isolation, a simple system structure, and a high fault detection rate. A single stabilization control device can achieve fault-safe fault tolerance.

[0065] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with each other, and with each other.

Claims

1. A stabilization control device in active / standby mode, characterized in that: include: Two groups of stabilization control modules, wherein one group of the stabilization control modules in the two groups is a main stabilization control channel, and the other group of the stabilization control modules in the two groups is a backup stabilization control channel; The main stabilization control channel and the main stabilization control channel realize mutual switching of working channels through data interaction; The stability augmentation control main channel and the stability augmentation control backup channel both include a command branch and a monitoring branch; The instruction branch is used to receive a sensor signal and output a first switch indication through the instruction branch. The monitoring branch is used to receive a sensor signal and generate a second switch indication through the monitoring branch. When the first switch indication and the second switch indication are consistent, an EHSV drive current is output.

2. The active-standby mode stabilization control device according to claim 1, characterized in that: Both the command branch and the monitoring branch include: Sensor acquisition unit, control law calculation unit, fault monitoring unit and cross-channel monitoring unit; Collecting a plurality of sensor data through the sensor acquisition unit, and inputting the plurality of sensor data into the control law calculation unit; The control law calculation unit calculates the sensor data and generates a digital control command signal; The cross-channel monitoring unit is used to monitor the consistency of the digital control command signal of the command branch and the digital control command signal of the monitoring branch; The fault monitoring unit is used to monitor various faults of the branch where the fault monitoring unit is located.

3. The active-standby mode stabilization control device according to claim 2, characterized in that: The monitoring branch also includes: Servo drive unit; The servo drive unit is used to convert the digital control command signal into the EHSV drive current, and output the EHSV drive current to the electro-hydraulic servo valve.

4. The active-standby mode stabilization control device according to claim 2, characterized in that: The monitoring branch also includes: Integrated warning unit; The comprehensive warning unit is used to output an alarm signal when the digital control command signal of the command branch is inconsistent with the digital control command signal of the monitoring branch.

5. The active-standby mode stabilization control device according to claim 4, characterized in that: The cross-channel monitoring unit is also used to notify the comprehensive warning unit when the digital control command signal of the command branch and the digital control command signal of the monitoring branch are inconsistent.

6. The active-standby mode stabilization control device according to claim 2, characterized in that: The fault monitoring unit comprises: and value monitoring, model monitoring and self-monitoring; The sum value monitoring is used to monitor the validity of the sensor signal of the branch where the sum value monitoring is located; The model monitoring is used to determine whether the sensor signal after AD conversion meets the requirements or demands of a predetermined model; The self-monitoring is used to monitor the fault of the branch where the self-monitoring is located.

7. The active-standby mode stabilization control device according to claim 6, characterized in that: The fault monitoring unit also includes: Comparative monitoring; The comparison monitoring is used to compare the sensor signal of the command branch with the sensor signal of the monitoring branch; If the sensor signal of the command branch is consistent with the sensor signal of the comparison monitoring, the sensor signal is transmitted to the control law.

8. The active-standby mode stabilization control device according to claim 2, characterized in that: The instruction branch and the monitoring branch also include: Channel fault logic; The channel fault logic is used to output the switch indication through fault logic control.

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