A dual-redundancy synchronization circuit

Abstract

The application discloses a kind of dual-redundancy synchronous circuits, including servo control module redundancy 1 circuit and servo control module redundancy 2 circuit;Servo control module redundancy 1 circuit includes main control 1, resistance R1, resistance R2 and triode D1, for the +5V synchronous square wave signal that main control 1 sends out, is converted to 28V synchronous square wave signal and is sent to servo control module redundancy 2 circuit by the conversion of circuit;Servo control module redundancy 2 circuit includes main control 2, resistance R3, resistance R4 and photoelectric coupler U1, for the 28V synchronous square wave signal of redundancy 1, is converted to +5V synchronous square wave signal by the conversion of circuit, and carries out redundancy synchronization identification.By the setting of servo control module redundancy 1 circuit and servo control module redundancy 2 circuit, the effective shortening of square wave signal control between redundancy 1 and redundancy 2 can be carried out, to realize the synchronization between redundancy of emergency backup control system, guarantee the reliability of redundancy synchronization signal.

Description

Technical Field

[0001] This invention belongs to the field of flight control, specifically relating to a dual-redundant synchronization circuit. Background Technology

[0002] The emergency backup control system needs to obtain the signal source acquisition results and control law calculation results of its redundancy through data exchange between redundancies. These results are used for data voting and output, and synchronization between redundancies needs to be established. When two redundancies are synchronizing, initial synchronization must be completed first. After the initial synchronization is successfully established, periodic synchronization is performed to obtain its redundancy data and status information.

[0003] When two redundant emergency backup control systems are installed in the same chassis, the synchronization circuit can be achieved using the +5V synchronization square wave signal issued by the main controller 1, without the need for additional circuit configuration.

[0004] However, when the two redundant emergency backup control systems are installed in different chassis, and the installation distance between the two chassis is far and the cable transmission distance is long, the current +5V synchronous square wave signal level is low and easily interfered with, making the establishment of a reliable synchronization signal between the redundancies unreliable.

[0005] The emergency backup control system is configured with a 500μs high-level wait time for the initial power-on synchronization square wave signal between redundancies, and a 200μs high-level wait time for the periodic synchronization square wave signal after initial power-on synchronization. When using ordinary relays to transmit the synchronization square wave signal, the relays' on / off times are long, exceeding 2ms, which cannot meet the time requirements for initial power-on synchronization and periodic synchronization square wave signals between redundancies. Therefore, a circuit is needed to enable dual-redundancy synchronization, allowing the two redundancies to establish synchronization within a specified time for data transmission between them. Summary of the Invention

[0006] In view of this, the present invention provides a dual-redundancy synchronization circuit, which can realize the synchronization between redundancies in the emergency backup control system and ensure the reliability of the redundancy synchronization signal.

[0007] The technical solution adopted in this invention is: a dual-redundancy synchronous circuit, characterized in that: it includes a servo control module redundancy 1 circuit and a servo control module redundancy 2 circuit; The servo control module redundancy 1 circuit includes a main controller 1, resistors R1 and R2, and a transistor D1. The transistor is connected to a 28V power supply. The +5V synchronous square wave signal emitted by the main controller 1 is converted into a 28V synchronous square wave signal by the circuit and sent to the servo control module redundancy 2 circuit. The redundancy 2 circuit of the servo control module includes a main controller 2, resistors R3 and R4, and an optocoupler U1. The optocoupler U1 is connected to a +5V power supply and is used to collect the 28V synchronous square wave signal emitted by the redundancy 1 circuit of the servo control module. After being converted into a +5V synchronous square wave signal by the circuit, it is used for redundancy synchronization identification.

[0008] Furthermore, in the redundancy 1 circuit of the servo control module, the output terminal of the main controller 1 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the base of the transistor D1; the emitter of the transistor D1 is connected to the power ground; the collector of the transistor D1 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the 28V power supply; the collector of the transistor D1 outputs the 28V level signal of redundancy 1.

[0009] Furthermore, the resistor R1 is an RMK1608KB102FM, the resistor R2 is an RMK6332HB202BM, and the transistor D1 is a 2N2222.

[0010] Furthermore, in the redundant 2 circuit of the servo control module, one end of resistor R3 is connected to the collector of transistor D1, and the other end of resistor R3 is connected to the positive input terminal IN+ of optocoupler U1; the inverting input terminal IN- of optocoupler U1 is connected to power ground; the power supply voltage terminal VCC of optocoupler U1 is connected to +5V power supply; the output terminal OUT of optocoupler U1 is connected to one end of resistor R4 and the input terminal of main control 2; the other end of resistor R4 is connected to +5V power supply.

[0011] Furthermore, the resistor R3 is an RMK3225KB432JM model, the optocoupler U1 is a 6N137 model, and the resistor R4 is an RMK1608KB103FM model.

[0012] Furthermore, the 5V square wave signal of the +5V synchronous signal emitted by the main controller 1 needs to last for 200μs.

[0013] The beneficial effects of this invention are: by setting up the redundancy 1 circuit and the redundancy 2 circuit of the servo control module, the transmission of square wave signal control between redundancy 1 and redundancy 2 can be effectively shortened, thereby realizing the synchronization between redundancies of the emergency backup control system and ensuring the reliability of the redundancy synchronization signal. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the dual-redundant synchronous signal level conversion principle of the present invention.

[0015] Figure 2 This is the circuit connection diagram for the redundancy 1 of the servo control module.

[0016] Figure 3 This is the circuit connection diagram for the redundancy 2 of the servo control module. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, a dual-redundancy synchronization circuit includes a servo control module redundancy 1 circuit and a servo control module redundancy 2 circuit. The servo control module redundancy 1 circuit receives a +5V synchronization square wave signal, which is then converted into a 28V synchronization square wave signal and sent to the servo control module redundancy 2 circuit. The servo control module redundancy 2 circuit acquires the 28V synchronization square wave signal from redundancy 1, converts it back to a +5V synchronization square wave signal, and performs redundancy synchronization identification.

[0019] The servo control module redundancy 1 circuit includes main controller 1, resistors R1 and R2, and transistor D1. The redundancy 2 circuit includes resistors R3 and R4, optocoupler U1, and main controller 2.

[0020] like Figure 2 As shown, in the redundancy 1 circuit of the servo control module, the output terminal of the main controller 1 is connected to one end of resistor R1, and the other end of resistor R1 is connected to the base of transistor D1. The main controller 1 is used to output a +5V synchronous square wave signal for redundancy 1. The emitter of transistor D1 is connected to power ground; the collector of transistor D1 is connected to one end of resistor R2, and the other end of resistor R2 is connected to a 28V power supply; simultaneously, the collector of transistor D1 outputs the 28V level signal for redundancy 1.

[0021] Resistor R1 is RMK1608KB102FM, resistor R2 is RMK6332HB202BM, and transistor D1 is 2N2222.

[0022] The working principle of the redundancy 1 circuit of the servo control module is as follows: when the +5V synchronous square wave signal of redundancy 1 is ground, the transistor D1 is not conducting, and the level signal output to the redundancy 2 circuit of the servo control module is 28V; when the +5V synchronous square wave signal of redundancy 1 is 5V, the transistor D1 is saturated and conducting, and the level signal output to the redundancy 2 circuit of the servo control module is ground.

[0023] like Figure 3As shown, one end of resistor R3 in the redundancy 2 circuit of the servo control module is connected to the collector of transistor D1 to receive the 28V synchronization signal from the redundancy 1 circuit of the servo control module. The other end of resistor R3 is connected to the positive input terminal IN+ of optocoupler U1; the negative input terminal IN- of optocoupler U1 is connected to power ground; the power supply voltage terminal VCC of optocoupler U1 is connected to the +5V power supply; the output terminal OUT of optocoupler U1 is connected to one end of resistor R4 and the input terminal of main control 2. The other end of resistor R4 is connected to the +5V power supply.

[0024] Resistor R3 is RMK3225KB432JM, optocoupler U1 is 6N137, and resistor R4 is RMK1608KB103FM.

[0025] The working principle of the redundancy 2 circuit of the servo control module is as follows: when the 28V synchronous square wave signal output by the redundancy 1 circuit of the servo control module is ground, the optocoupler U1 is not turned on and outputs 5V; when the 28V synchronous square wave signal output by the redundancy 1 circuit of the servo control module is 28V, the optocoupler U1 is turned on and outputs ground.

[0026] When the main controller 1 sends a +5V synchronous square wave signal (note that the 5V square wave needs to last for 200μs), it is converted into a 28V synchronous square wave signal by the saturated conduction of transistor D1 and sent to the redundancy 2 circuit of the servo control module. The redundancy 2 circuit of the servo control module takes the 28V synchronous square wave signal acquired from redundancy 1, turns it on via fast optocoupler U1, and converts the synchronous square wave signal sent by redundancy 1 into a +5V synchronous square wave signal for redundancy synchronization identification.

[0027] The synchronization signal identification method between redundancy 1 and redundancy 2 is the same. It is sent by redundancy 2 and received by redundancy 1, that is, the above-mentioned symmetrical circuit can be set between redundancy 2 and redundancy 1.

[0028] The synchronization time of this invention can be measured using a dual-channel oscilloscope. One channel of the oscilloscope measures the synchronization square wave signal emitted by main controller 1, while the second channel measures the synchronization square wave signal acquired by main controller 2. Approximately 20 μs after redundancy 1 emits the synchronization square wave signal, redundancy 2 receives the 5V synchronization square wave signal. This 20 μs time lag satisfies the high-level waiting time requirements for initial power-on synchronization and periodic synchronization between redundancies, thus achieving the synchronization function.

[0029] It should be noted that the synchronization level of this invention can be configured according to the specific product characteristics. For example, in the above scheme, helicopters commonly use a +28V power supply. Alternatively, the +15V internal power supply of the servo control module can be used. In this case, replacing +28V with +15V can also achieve synchronization. If a +15V power supply is used, the component parameters used in the circuit can be configured as follows: In the redundancy 1 circuit: resistor R1 is RMK1608KB102FM, resistor R2 is RMK6332HB202BM, and transistor D1 is 2N2222.

[0030] In the redundant circuit 2: resistor R3 is RMK3225KB102BM, optocoupler U1 is 6N137, and resistor R4 is RMK1608KB102FM.

Claims

1. A dual-redundant synchronous circuit, characterized in that: Includes servo control module redundancy 1 circuit and servo control module redundancy 2 circuit; The servo control module redundancy 1 circuit includes a main controller 1, resistors R1 and R2, and a transistor D1. The transistor is powered by a 28V supply. The +5V synchronous square wave signal emitted by the main controller 1 is converted into a 28V synchronous square wave signal by the circuit and sent to the servo control module redundancy 2 circuit. The output terminal of the main controller 1 is connected to one end of resistor R1, and the other end of resistor R1 is connected to the base of transistor D1. The emitter of transistor D1 is connected to power ground. The collector of transistor D1 is connected to one end of resistor R2, and the other end of resistor R2 is connected to the 28V supply. The collector of transistor D1 outputs the 28V level signal of redundancy 1. The servo control module redundancy 2 circuit includes a main controller 2, resistors R3 and R4, and an optocoupler U1. Optocoupler U1 is connected to a +5V power supply and is used to acquire the 28V synchronous square wave signal emitted by the servo control module redundancy 1 circuit. This signal is converted to a +5V synchronous square wave signal for redundancy synchronization identification. One end of resistor R3 is connected to the collector of transistor D1, and the other end is connected to the positive input terminal IN+ of optocoupler U1. The inverting input terminal IN- of optocoupler U1 is connected to power ground. The power supply voltage terminal VCC of optocoupler U1 is connected to a +5V power supply. The output terminal OUT of optocoupler U1 is connected to one end of resistor R4 and the input terminal of the main controller 2. The other end of resistor R4 is connected to a +5V power supply. The servo control module redundancy 1 sends a 28V synchronous square wave signal to the servo control module redundancy 2, which receives a 5V synchronous square wave signal with a delay time of 20μs.

2. The dual-redundant synchronous circuit as described in claim 1, characterized in that: The resistor R1 is an RMK1608KB102FM, the resistor R2 is an RMK6332HB202BM, and the transistor D1 is a 2N2222.

3. The dual-redundant synchronous circuit as described in claim 1, characterized in that: The resistor R3 is an RMK3225KB432JM model, the optocoupler U1 is a 6N137 model, and the resistor R4 is an RMK1608KB103FM model.

4. The dual-redundant synchronous circuit as described in claim 1, characterized in that: The +5V synchronous square wave signal emitted by the main controller 1 needs to have a duration of 200μs.

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