A DSP-based integrated computing system for power-on and guidance control of a projectile

Abstract

This invention relates to the field of embedded computing system technology, and provides a DSP-based integrated computing system for missile power-on and guidance control. The system includes a comprehensive control computing module, a communication module, a discrete input detection module, and a power conversion module. The comprehensive control computing module includes a DSP processing circuit, and the discrete input detection module includes a discrete isolation acquisition circuit. The power conversion module includes a primary power conversion module and a secondary power conversion module. This application simplifies the system structure, allowing the hardware platform in the missile guidance control system to be shared with the electrical control box in the electrical system, eliminating the waste of control computing circuitry caused by simple electrical control requirements, and realizing power supply to various devices inside the missile according to the power-on sequence.

Description

Technical Field

[0001] This invention relates to the field of embedded computing system technology, and in particular to a DSP-based integrated computing system for missile power-on and guidance control. Background Technology

[0002] A missile typically consists of a guidance and control system, a warhead system, a propulsion system, and an electrical system. Each system has an independent control unit, and they work together to achieve the desired strike effect. The guidance and control system is the core of the missile, including information acquisition (such as the seeker and inertial navigation), control calculation, and execution units. The control calculation unit communicates with the various systems within the missile to acquire information and issue control commands. Another core component is the electrical system, which handles the power distribution for the entire missile and is the power source for all systems, making it crucial to the overall design.

[0003] Traditional power distribution systems typically consist of a thermal battery, an electronic control box, and cables. The electronic control box utilizes a processor or MCU to perform basic control calculations, controlling the power-on sequence of modules within the missile according to power-on timing requirements, and then transferring power to other units via cables. In this approach, the simple functional requirements of the electronic control box occupy an entire control computing platform. Furthermore, other systems within the missile, besides interconnecting with the guidance and control system, also require additional connections to the electronic control box to transmit the signals necessary for power-on timing control. This design complicates the internal interconnection wiring and results in wasted computing resources, increased weight, and higher costs. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a DSP-based integrated computing system for missile power-on and guidance control, in order to solve the problems of complex interconnection of various modules within the missile, waste of computing resources, and increased weight and cost in the prior art.

[0005] This invention provides a DSP-based integrated computing system for missile power-on and guidance control, specifically comprising:

[0006] A comprehensive control calculation module, which includes a DSP processing circuit;

[0007] A communication module, which is used for the integrated control and computing module to communicate with external devices;

[0008] A discrete input detection module is used to collect discrete quantity information and power supply information of the external device, and report the discrete quantity information and power supply information to the integrated control calculation module. The discrete input detection module includes a discrete quantity isolation acquisition circuit.

[0009] The power conversion module includes a primary power conversion module and a secondary power conversion module. The primary power conversion module supplies power to the external device based on the power-on control command issued by the integrated control and calculation module. The secondary power conversion module supplies power to the integrated control and calculation module, the communication module, the discrete input detection module, and the primary power conversion module by converting the primary power supply to the secondary power supply.

[0010] Furthermore, the DSP processing circuit includes a DSP core configuration circuit, a reset circuit, a clock circuit, and a storage circuit. The DSP core configuration circuit includes digital signal processing functions, serial port protocol processing and communication functions, digital input / output functions, and memory access functions. The reset circuit is connected to the DSP core configuration circuit to reset the DSP processor. The clock circuit is connected to the DSP core configuration circuit to provide a clock signal. The storage circuit is connected to the DSP core configuration circuit and receives commands from the DSP processor to perform data storage and retrieval operations.

[0011] Furthermore, the communication module includes an isolation interface circuit, which connects the integrated control computing module and the external device respectively, and the communication module adopts the RS422 communication protocol.

[0012] Furthermore, the primary power conversion module includes a high-current conversion circuit and a low-current conversion circuit, and the high-current conversion circuit further includes:

[0013] The high-current transfer circuit receives a first control command sent by the integrated control calculation module. The first control command includes a first power-on sequence. The high-current transfer circuit supplies power to the high-current demand devices in the external devices according to the first power-on sequence. The high-current transfer circuit supplies power to the high-current demand devices in the external devices by outputting a switch quantity to control the electromagnetic relay or PMOS transistor through the DSP processing circuit. The high-current transfer circuit also includes the anti-reverse diode. The high-current transfer circuit provides filtered primary power to the secondary power conversion module. The secondary power conversion module supplies power to each module in the system based on the filtered primary power.

[0014] Furthermore, the low-current switching circuit also includes:

[0015] The low-current transfer circuit receives a second control command sent by the integrated control calculation module. The second control command includes a second power-on sequence. The low-current transfer circuit supplies power to devices in the external device that require instantaneous low current based on the second power-on sequence. The low-current transfer circuit includes a solid-state relay. The low-current transfer circuit uses the DSP processing circuit to output a switching quantity to control the solid-state relay, thereby supplying power to devices in the external device that require instantaneous low current.

[0016] Furthermore, the system also includes:

[0017] The secondary power conversion module includes a secondary power conversion circuit and a voltage conversion circuit. The secondary power conversion circuit is connected to the primary power conversion module. The secondary power conversion circuit converts the filtered primary power transmitted by the high-current conversion circuit into secondary power. The voltage conversion circuit converts the secondary power into the operating voltage of different modules in the system, thereby enabling power supply to different modules in the system.

[0018] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include: the present invention provides a DSP-based integrated computing system for missile power-on and guidance control, which simplifies the functional structure design of missile power-on control and power distribution, reduces the size and weight of the missile and lowers the cost by sharing the hardware platform resources of the guidance control system and the electronic control box. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the integrated computing system structure for missile power-on and guidance control based on DSP provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the implementation of the high-current switching circuit provided in an embodiment of the present invention. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] This invention provides a DSP-based integrated computing system for missile power-on and guidance control, which simplifies the functional structure design of missile power-on control and power distribution. By sharing the hardware platform resources of the guidance control system and the electronic control box, the size and weight of the missile are reduced, and the cost is lowered.

[0025] according to Figure 1 As shown, the present invention provides an integrated computing system for missile power-on and guidance control based on DSP, specifically comprising: a comprehensive control computing module, which includes a DSP processing circuit; a communication module, used for communication between the comprehensive control computing module and external devices; a discrete input detection module, used for collecting discrete quantity information and power supply information of the external devices and reporting the discrete quantity information and power supply information to the comprehensive control computing module, the discrete input detection module including a discrete quantity isolation acquisition circuit; and a power conversion module, which includes a primary power conversion module and a secondary power conversion module, wherein the primary power conversion module supplies power to the external devices according to the power-on control command issued by the comprehensive control computing module; and the secondary power conversion module supplies power to the comprehensive control computing module, the communication module, the discrete input detection module, and the primary power conversion module by converting the primary power to the secondary power.

[0026] Specifically, the integrated control and calculation module completes the acquisition and calculation of various data from the integrated power-on and guidance control platform, and generates guidance and power-on control commands according to the preset guidance law, realizing the functions of power-on and guidance control for the entire missile; the communication module is an RS422 serial communication interface, which receives control commands from the integrated control and calculation module and completes information interaction between the integrated computing platform and the missile's onboard servo motors, seeker head, and other equipment; the discrete input detection module receives important discrete information and missile-related power supply information, realizing the function of identifying the missile's power supply status and the presence status of various devices inside the missile, and transmits the acquired status back to the integrated control and calculation module; the primary power conversion module receives power-on control commands from the integrated control and calculation module, realizing the function of powering other devices inside the missile according to the preset power-on sequence; the secondary power conversion module completes the conversion from primary power to secondary power and provides the required voltages, such as 3.3V and 1.2V, to various modules within the integrated computing platform.

[0027] Furthermore, the integrated control and computing module includes a DSP processing circuit, which comprises a DSP core configuration circuit, a reset circuit, a clock circuit, and a storage circuit. The DSP core configuration circuit includes digital signal processing functions, RS422 / RS232 serial port protocol processing and communication functions, digital input / output functions, and memory access functions. The reset circuit is connected to the DSP core configuration circuit to reset the DSP processor. The clock circuit generates the clock required for serial port and DSP operation, and is connected to the DSP core configuration circuit to provide the clock signal. The storage circuit is connected to the DSP core configuration circuit, receives processor commands to perform data access operations, and realizes non-volatile storage and active memory expansion of programs and data.

[0028] Furthermore, the communication module includes an RS422 isolation interface circuit. This circuit connects the integrated control and computing module to the external connector, receives externally input differential RS422 data, converts it into a single-ended signal, and transmits it to the DSP processing circuit for data parsing and processing. It also receives single-ended data from the integrated control and computing module, converts it into a differential signal, and sends it to other devices via the external connector, thereby enabling information exchange. The RS422 isolation interface circuit isolates the internal ground of the integrated computing platform from the RS422 communication signal reference ground, and can employ optocoupler isolation or capacitive isolation to enhance communication security.

[0029] Furthermore, the discrete input detection module includes a discrete quantity isolation acquisition circuit. This circuit is connected to the integrated control and calculation module, acquiring important discrete quantity information from external inputs and missile power supply information to determine the current power supply status of the launch vehicle or battery. The discrete quantity isolation acquisition circuit transmits the acquisition results to the DSP processing circuit, which then uses a timing control algorithm to perform subsequent power-on control based on the acquired values. The discrete quantity isolation acquisition circuit has an isolation acquisition function (capacitive or optocoupler isolation can be used), achieving isolation between the secondary power supply within the integrated computing platform and the primary power supply on the missile, ensuring that the two power supply circuits do not interfere with each other.

[0030] Furthermore, the primary power conversion module includes a high-current conversion circuit and a low-current conversion circuit. See the schematic diagram for the implementation of the high-current conversion circuit. Figure 2 As shown, the high-current transfer circuit receives the first control command sent by the integrated control computing module and, according to the first power-on sequence requirements in the first control command, transfers high-current power to other devices within the missile. Power for other devices is provided by the integrated computing platform, and the steady-state transfer current can reach up to 25A. The high-current transfer circuit must meet the maximum power demand within the missile. The external power supply is switched using a processor output switching signal to control an electromagnetic relay or a high-power PMOS transistor. In the electromagnetic relay scheme, because the electromagnetic relay requires a high control signal current, the control signal directly output by the processor does not have the necessary driving capability. Therefore, a Darlington optocoupler is added at the back end of the processor to enhance the driving capability of the control signal before connecting it to the back-end controlled chip.

[0031] Preferably, to prevent reverse connection of the power supply, a reverse-biased diode with high current-carrying capacity needs to be added to the circuit. The diode can be a domestically produced super rectifier diode with a current-carrying capacity of at least 30A. In this embodiment, a TO-254 package is selected and placed close to the metal casing of the integrated computing platform to ensure heat dissipation. Besides connecting to external devices, the high-current transfer circuit also supplies filtered primary power to the integrated computing platform.

[0032] Furthermore, the low-current transfer circuit receives a second control command from the integrated control calculation module and transfers the primary power supply of some devices within the device to a low current according to the second power-on sequence requirements in the second control command. The transfer current duration is short, with a transient value not exceeding 10A, and the rated current carrying capacity requirement of the transfer circuit is low. The low-current transfer circuit includes a solid-state relay, which is directly controlled by the DSP processor outputting a switching signal to power devices in the external equipment that require instantaneous low current.

[0033] Furthermore, the secondary power conversion module includes a secondary power conversion circuit and a DC-DC voltage conversion circuit. The secondary power conversion circuit is connected to the primary power conversion module and uses a high-power DC-DC chip to convert the filtered primary power supply into the secondary power supply used by the integrated computing platform. The DC-DC voltage conversion circuit uses a DC-DC chip to further convert the secondary power supply into the operating voltage required by different chips in the platform, such as 3.3V, 1.2V, etc.

[0034] The embodiments of the present invention achieve the following technical effects:

[0035] 1. This invention provides a DSP-based integrated computing system for missile power-on and guidance control, which enables the hardware platform in the missile guidance control system to be shared with the electronic control box in the electrical system, eliminating the waste of control computing circuits for simple electronic control requirements, reducing internal interconnection of the missile, simplifying the functional structure, realizing the miniaturization and weight reduction of the missile, and achieving low-cost design.

[0036] 2. This invention uses a DSP chip as the core processor, supplemented by an RS422 communication circuit, a discrete quantity acquisition circuit, and a power conversion circuit, to realize the power supply to each device inside the missile according to the power-on sequence.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A DSP-based integrated computing system for missile power-on and guidance control, characterized in that, The system includes: A comprehensive control calculation module, which includes a DSP processing circuit; A communication module, which is used for the integrated control and computing module to communicate with external devices; A discrete input detection module is used to collect discrete quantity information and power supply information of the external device, and report the discrete quantity information and power supply information to the integrated control calculation module. The discrete input detection module includes a discrete quantity isolation acquisition circuit. The power conversion module includes a primary power conversion module and a secondary power conversion module. The primary power conversion module supplies power to the external device based on the power-on control command issued by the integrated control and calculation module. The secondary power conversion module supplies power to the integrated control and calculation module, the communication module, the discrete input detection module, and the primary power conversion module by converting the primary power supply to the secondary power supply. The primary power conversion module includes a high-current conversion circuit and a low-current conversion circuit, wherein the high-current conversion circuit further includes: The high-current transfer circuit receives a first control command sent by the integrated control calculation module. The first control command includes a first power-on sequence. The high-current transfer circuit supplies power to the high-current demand devices in the external devices according to the first power-on sequence. The high-current transfer circuit supplies power to the high-current demand devices in the external devices by outputting a switch quantity to control the electromagnetic relay or PMOS transistor through the DSP processing circuit. The high-current transfer circuit also includes a reverse protection diode. The high-current transfer circuit provides filtered primary power to the secondary power conversion module. The secondary power conversion module supplies power to each module in the system based on the filtered primary power. The low-current adapter circuit also includes: The low-current transfer circuit receives a second control command sent by the integrated control calculation module. The second control command includes a second power-on sequence. The low-current transfer circuit supplies power to devices in the external device that require instantaneous low current based on the second power-on sequence. The low-current transfer circuit includes a solid-state relay. The low-current transfer circuit uses the DSP processing circuit to output a switching quantity to control the solid-state relay, thereby supplying power to devices in the external device that require instantaneous low current.

2. The integrated computing system for missile power-on and guidance control based on DSP according to claim 1, characterized in that, The system also includes: The DSP processing circuit includes a DSP core configuration circuit, a reset circuit, a clock circuit, and a storage circuit. The DSP core configuration circuit includes digital signal processing, serial port protocol processing and communication, digital input / output, and memory access functions. The reset circuit is connected to the DSP core configuration circuit to reset the DSP processor. The clock circuit is connected to the DSP core configuration circuit to provide a clock signal. The storage circuit is connected to the DSP core configuration circuit and receives commands from the DSP processor to perform data storage and retrieval operations.

3. The integrated computing system for missile power-on and guidance control based on DSP according to claim 1, characterized in that, The communication module includes an isolation interface circuit, which connects the integrated control calculation module and the external device respectively. The communication module adopts the RS422 communication protocol.

4. The integrated computing system for missile power-on and guidance control based on DSP according to claim 1, characterized in that, The system also includes: The secondary power conversion module includes a secondary power conversion circuit and a voltage conversion circuit. The secondary power conversion circuit is connected to the primary power conversion module. The secondary power conversion circuit converts the filtered primary power transmitted by the high-current conversion circuit into secondary power. The voltage conversion circuit converts the secondary power into the operating voltage of different modules in the system, thereby enabling power supply to different modules in the system.

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