A full-digital interconnection system of launch vehicle based on TTE bus

Abstract

The application discloses a kind of TTE bus-based launch vehicle full digital interconnection system, belongs to manned launch vehicle control system integration technical field.The application realizes the integration information interaction between the on-board equipment of launch vehicle control system and the rocket ground by unified TTE bus, avoids the heterogeneous of control system on-board bus and rocket ground bus;Avoid extra bus transmission information between rocket ground, at the same time, cancel the "reset" and other on-off control signal between rocket ground, are transmitted by TTE bus, greatly simplify the rocket ground interface type and rocket ground cable scale, compress the cost of control system.Meanwhile, using TTE bus to transmit rocket ground information, compared with on-off quantity, has higher reliability;Except data converter, the simplified and unified external communication interface between on-board equipment, help the productization and generalization design of equipment, can compress equipment cost, simplify design difficulty.

Claims

1. A fully digital interconnection system for launch vehicles based on the TTE bus, characterized in that, It includes several digital control devices connected via a TTE bus; the digital control devices include power distribution communication devices, functional node devices, and aggregation node devices; the power distribution communication devices are digital control power distributors used to implement the functions of a TTE switch; the functional node devices are digital control functional devices that interact with external information via the TTE bus; the aggregation node devices are devices used to convert local non-TTE messages and interact with other control system digital control devices via the TTE bus. The power distribution and communication equipment of each stage of the launch vehicle is connected to the power distribution and communication equipment of the adjacent stage through a triple-redundant bus; the functional node equipment and the aggregation node equipment are connected to the power distribution and communication equipment of the same stage as the nearest one; non-TTE bus equipment with communication needs is connected to the aggregation node equipment of the same stage as the nearest one. Each stage of the launch vehicle is equipped with at least one main power distribution communication device. When the conditions for a secondary power distribution communication device are met, one or two additional secondary power distribution communication devices are also provided. Each level of main power distribution communication equipment is connected to the main power distribution communication equipment of the adjacent level through a set of triple redundant buses, and each level of slave power distribution communication equipment is connected to the main power distribution communication equipment of its own level through a set of triple redundant buses; the number of power distribution communication equipment at each level of the launch vehicle does not exceed three.

2. The all-digital interconnection system for launch vehicles based on the TTE bus according to claim 1, characterized in that, The conditions for the power distribution communication equipment include: When the sum of the number of TTE terminal nodes corresponding to the functional node equipment and aggregation node equipment within this level, and other section power distribution communication equipment that has a physical connection with the main power distribution communication equipment within this level, exceeds 15, or when the number of controllable power distribution paths required within this level is greater than n, the number of power distribution communication equipment is one; where n is the maximum controllable power distribution path scale available for 1 power distribution communication equipment. When the sum of the number of TTE end nodes corresponding to the functional node equipment and aggregation node equipment within this level exceeds the number of TTE ports provided by two power distribution communication combinations, excluding those used for interconnection of power distribution communication combinations within and between levels, or when the number of controllable power distribution paths required within this level is greater than 2n, the number of power distribution communication devices shall be two.

3. The all-digital interconnection system for launch vehicles based on the TTE bus according to claim 1, characterized in that, The power distribution and communication equipment includes a power distribution unit, a power conversion unit, a switch, and a numerical control unit; The power distribution unit receives a 28V power input from an external power source. It uses an uncontrolled power distribution path to supply power to this equipment and a controlled power distribution path to supply power to other digital control equipment within the launch vehicle stage. The power conversion unit is used to convert the 28V power supply bus output by the power distribution unit into various voltages required by other units in the power distribution communication equipment; Switches are used for interconnection with CNC units and digital control equipment; The CNC unit receives control and power distribution commands from other digital control devices via the TTE bus, controls the power distribution unit to perform corresponding operations, and sends the status test information of its own power distribution unit, power conversion unit, and CNC unit to other devices via the TTE bus.

4. The all-digital interconnection system for launch vehicles based on the TTE bus according to claim 3, characterized in that, The system consists of three switches, forming a triple-redundant bus network; each of the three switches has 16 ports.

5. The all-digital interconnection system for launch vehicles based on the TTE bus according to claim 1, characterized in that, The functional node device includes a functional unit, a power conversion unit, and a numerical control unit; Functional units are used to implement control functions, including specific data acquisition and execution output; The power conversion unit is used to convert the 28V power supply bus output by the power distribution and communication equipment into various voltages required by other units within the equipment; The CNC unit receives control commands and data sent by other devices in the control system via the TTE bus, completes information processing and calculation, controls the functional units to perform corresponding operations, and sends the status test information of the power distribution unit, power conversion unit and CNC unit itself to other devices via the TTE bus. The number of CNC units is 1 to 3.

6. The all-digital interconnection system for launch vehicles based on the TTE bus according to claim 1, characterized in that, The aggregation node device includes one or more interface conversion units, power conversion units, and numerical control units; The interface conversion unit is used to receive non-TTE format interface information sent by various non-TTE bus devices within the unit and send it to the CNC unit. The power conversion unit is used to convert the 28V power supply bus output by the power distribution and communication equipment into various voltages required by other units within the equipment; The CNC unit receives non-TTE format messages forwarded by the interface conversion unit, performs calculations and data processing as needed, and then sends the data processing results, along with the power distribution unit, power conversion unit and CNC unit status test information of the device itself, to other devices via the TTE bus. The non-TTE bus interfaces include digital input interfaces and local bus interfaces.

7. A fully digital interconnection system for launch vehicles based on a TTE bus according to any one of claims 3 to 6, characterized in that, The numerical control unit includes a CPU subsystem and a TTE terminal node subsystem; The CPU subsystem is used to perform instruction data processing and calculation, and send the calculated instruction data to the TTE end node subsystem; the instruction data includes control commands or test data collected or received during the ground test or flight of the launch vehicle; The TTE end node subsystem is used to receive external TTE messages, parse them into instruction data and send them to the CPU subsystem, or receive instruction data transmitted by the CPU subsystem, frame them into TTE messages and send them to the TTE bus.

8. A fully digital interconnection system for launch vehicles based on a TTE bus according to claim 7, characterized in that, The CPU subsystem is equipped with a memory chip, external interface IP and related circuits. It communicates with other circuits in this CNC unit through the RapidIO interface, and based on the reset circuit, it performs a reset operation on the CNC unit and other functional circuits after receiving a reset command transmitted by the TTE bus. The TTE terminal node subsystem is equipped with a storage chip, external interface IP and related circuits, and is interconnected with the switch unit in the power distribution communication equipment at this level through the SGMII method via three redundant links L1n, L2n and L3n. The TTE end node subsystem and the CPU subsystem communicate with each other through the IO interface to exchange interrupt messages and through the PCIe bus to transmit data and instructions. TTE end node address configuration methods include: setting the MAC address to be unique across the entire network, and using a pre-allocation method to solidify it in the storage chip; The IP address is set using an external address strobe method, and the IP address of the TTE end node is dynamically identified after power-on.

9. A fully digital interconnection system for launch vehicles based on a TTE bus according to claim 8, characterized in that, The reset circuit is a reset circuit without a switch input. The reset operation includes: the CPU subsystem receiving three types of external TTE instructions related to device reset: reset, disable reset, and enable reset; wherein, after receiving the disable reset TTE instruction, the CPU subsystem sets the disable reset status bit in the register; after receiving the enable reset TTE instruction, the CNC unit resets the disable reset status bit in the register; after receiving the reset TTE instruction, the CPU subsystem first checks the status of the disable reset status bit in the register. If it is set, it does not respond to the reset instruction; if it is reset, it executes the corresponding reset action; the reset action process includes: a) the CPU subsystem internally generates a 200ms wide reset pulse signal, and simultaneously resets the CPU subsystem programmable logic controller part, the TTE terminal node subsystem, and other circuit units within the device; b) after the above reset process is completed, the CPU subsystem sets the reset register and resets the CPU subsystem processor part.

Images