Engine control SIP module and working method

Abstract

The invention discloses an engine control SIP module and a working method, the engine control SIP module comprises a main control DSP, an auxiliary control DSP, an analog input module and a rotary transformer excitation / decoding module which are integrated in the module, a corresponding external interface is arranged, engine control and motor control functions are realized by using an SIP technology, the system integration level is improved, and the working efficiency is improved. The miniaturization and modularization of the comprehensive controller of the engine are realized; the design complexity of the engine control system is reduced, the reliability of the engine control system is improved, the main control DSP generates a control instruction by comparing the received instruction of the upper computer with the collected engine state information, the auxiliary control DSP receives the control instruction and compares the control instruction with the collected motor state information, and the control instruction is sent to the main control DSP. And an adjusting instruction is generated and is output through the PWM output interface, so that the control on the engine and the motor is realized, and the functions of continuously monitoring and controlling the normal operation of the engine are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of engine control, and in particular relates to an engine control SIP module and a working method. Background Art

[0002] The engine integrated controller is an important control device for the engine control system, fuel system, and lubricating oil system. Its function is to receive command information from the host computer, process frequency signals, analog signals, and switch signals, drive the electric fuel pump and electric lubricating oil pump to operate according to the control law requirements, and monitor the engine status in real time to protect the safety of the engine.

[0003] As the system becomes smaller, the system platform places increasingly stringent requirements on the performance, size, weight and power consumption of the engine integrated controller.

[0004] The existing dedicated engine integrated controller hardware is implemented using monolithic integrated circuits and discrete devices, resulting in large size and high price of the entire product, which cannot meet the current requirements of miniaturization and low cost of products. Summary of the invention

[0005] The object of the present invention is to provide an engine control SIP module and a working method thereof, so as to overcome the technical problem that the existing engine integrated controller has a large volume.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions: An engine control SIP module comprises a main control DSP, an auxiliary control DSP, an analog input module and a resolver excitation / decoding module, wherein the engine control SIP module is provided with a CANFD module interface, an RS422 transceiver interface, a rotation speed interface, a switch quantity interface and an analog input interface connected to the main control DSP, and an RS422 transceiver interface, an analog input interface, a resolver excitation / decoding interface and a PWM output interface connected to the auxiliary control DSP; The main control DSP is used to receive engine status information and generate control instructions; The auxiliary control DSP is used to receive control instructions and motor status information from the main control DSP and output PWM control signals; The main control DSP and the auxiliary control DSP are connected via two SCIs, the analog input module is connected to the main control DSP and the auxiliary control DSP respectively, and the resolver excitation / decoding module is connected to the auxiliary control DSP.

[0007] Furthermore, the CANFD module interface is bidirectionally connected to the main control DSP via two SPIs.

[0008] Furthermore, the main control DSP and the auxiliary control DSP are bidirectionally connected to the RS422 transceiver interface through SCI respectively.

[0009] Furthermore, the engine control SIP module also includes a fault status judgment interface, and the fault status judgment interface and the auxiliary control DSP are connected via 2 IO channels.

[0010] Furthermore, the fault status judgment interface is an input interface.

[0011] Furthermore, the speed interface is connected to the main control DSP through two CAPs, the switch quantity interface is connected to the main control DSP through four IOs, and the PWM output interface is connected to the auxiliary control DSP through twelve PWMs.

[0012] Furthermore, the resolver excitation / decoding module is connected to the auxiliary control DSP via SPI.

[0013] Furthermore, the analog input module is connected to the main control DSP via SPI, and the analog input module is directly connected to the on-chip AD of the auxiliary control DSP.

[0014] Furthermore, the main control DSP, the auxiliary control DSP and the analog input module are integrated on the main control board, the resolver excitation / decoding module is arranged on the RDC board, and the main control board and the RDC board are connected.

[0015] In a second aspect, a working method of an engine control SIP module is provided, comprising the following steps: The main control DSP generates control instructions based on the host computer instructions and engine status information; The auxiliary control DSP receives control instructions and collects motor status information through the analog input interface and resolver excitation / decoding interface to generate adjustment instructions; The auxiliary control DSP outputs adjustment instructions through the PWM output interface.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides an engine control SIP module. A main control DSP, an auxiliary control DSP, an analog input module and a resolver excitation / decoding module are integrated in the SIP module, and corresponding external interfaces are provided. The SIP technology is used to realize engine control and motor control functions, thereby improving the system integration level, realizing the miniaturization and modularization of the engine integrated controller; reducing the design complexity of the engine control system, and improving the reliability of the engine control system; reducing the maintenance frequency of the engine integrated controller, and reducing the risk and impact of task delays caused by maintenance. The engine control module is particularly suitable for use environments where disassembly is inconvenient.

[0017] Preferably, the engine control SIP module further includes a fault status judgment interface, through which the fault status FAULT signal is read to realize the judgment of the power circuit fault status.

[0018] The present invention provides a working method of an engine control SIP module. The main control DSP generates a control instruction by comparing the received host computer instruction with the collected engine status information. The auxiliary control DSP receives the control instruction and compares it with the collected motor status information to generate an adjustment instruction and output it through a PWM output interface. The present invention realizes the control of the engine and the motor and has the function of continuously monitoring and controlling the normal operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a block diagram of an engine control SIP module in an embodiment of the present invention; Figure 2 This is a structural diagram of an engine control SIP module in an embodiment of the present invention; Figure 3 This is a flow chart of a working method of an engine control SIP module in an embodiment of the present invention; Figure 4 It is a structural diagram of an engine integrated controller based on an engine control SIP module in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] An engine control SIP module, such as Figure 1 As shown, it includes a main control DSP, an auxiliary control DSP, an analog input module and a resolver excitation / decoding module integrated in the module. The main control DSP and the auxiliary control DSP are bidirectionally connected through two SCIs. The resolver excitation / decoding module is connected to the auxiliary control DSP. The analog input module is connected to the main control DSP and the auxiliary control DSP respectively. The engine control SIP module includes a CANFD module interface, an RS422 transceiver interface, a speed interface, a switch quantity interface, an analog input interface, a resolver excitation / decoding interface and a PWM output interface. Among them, the CANFD module interface, RS422 transceiver interface, speed interface, switch quantity interface and analog input interface are connected to the main control DSP, and the RS422 transceiver interface, analog input interface, resolver excitation / decoding interface and PWM output interface are connected to the auxiliary control DSP. In particular, the analog input interface is connected to the main control DSP and the auxiliary control DSP respectively through the analog input module, and the resolver excitation / decoding interface is connected to the auxiliary control DSP through the resolver excitation / decoding module.

[0026] Two internal SCI communication interfaces are used for serial data exchange between the main control DSP and the auxiliary control DSP, and for sending and receiving control instructions and status information of the electric fuel pump and the electric lubricating oil pump; The main control DSP of the engine control SIP module is connected to the CANFD module through two SPI communication interfaces for data interaction with the host computer and can also be used for online software upgrades; The main control DSP and auxiliary control DSP are connected to the RS422 transceiver through SCI respectively, which is used for data interaction with the host computer and can also be used for online software upgrade. The CANFD module interface and RS422 transceiver interface are bidirectional interfaces. A bidirectional interface means that the interface can both receive and output signals. The speed interface, switch interface and analog input interface are input interfaces, the PWM output interface is an output interface, and the resolver excitation / decoding interface is also a bidirectional interface.

[0027] In an optional implementation, the CANFD module interface is bidirectionally connected to the main control DSP through two SPIs, the main control DSP and the auxiliary control DSP are bidirectionally connected to the RS422 transceiver interface through SCI respectively, the speed interface is connected to the main control DSP through two CAPs, the switch quantity interface is connected to the main control DSP through four IOs, the PWM output interface is connected to the auxiliary control DSP through twelve PWMs, the rotary transformer excitation / decoding module is connected to the auxiliary control DSP through SPI, the analog input module is connected to the main control DSP through SPI, and the analog input module is directly connected to the on-chip AD of the auxiliary control DSP.

[0028] In this embodiment, an engine control SIP module is provided, including a main control DSP, an auxiliary control DSP, an analog input module and a resolver excitation / decoding module. The main control DSP and the auxiliary control DSP are connected via two SCIs, the analog input module is connected to the main control DSP and the auxiliary control DSP respectively, and the resolver excitation / decoding module is connected to the auxiliary control DSP; The engine control SIP module is provided with a CANFD module interface, an RS422 transceiver interface, a speed interface, a switch quantity interface and an analog input interface connected to the main control DSP, and an RS422 transceiver interface, an analog input interface, a resolver excitation / decoding interface and a PWM output interface connected to the auxiliary control DSP; The engine control SIP module is also provided with a fault status judgment interface as an input interface, which is connected to the auxiliary control DSP through two IOs for power circuit fault status judgment.

[0029] Both the main control DSP and the auxiliary control DSP are connected to an external crystal oscillator for clock signal generation and signal frequency stabilization.

[0030] In this embodiment, an engine control SIP module is provided. The main idea of ​​the engine control module based on SIP technology is to realize traditional engine control and two-way DC permanent magnet synchronous motor control by integrating DSP processor and interface signal processing circuit. The block diagram of the engine control SIP module is shown in FIG. Figure 1 As shown, the main functions of its integration are as follows: a.Integrated with domestic DSP processor; b. 2-way internal SCI communication interface for serial data exchange between main control DSP and auxiliary control DSP, used to send / receive control instructions / status information of electric fuel pump and electric lubricating oil pump; c. 2-way SPI communication interface connected to CANFD communication interface, used for data interaction with the host computer, and can also be used for online software upgrade; d. 2-way SCI communication interface is used for data interaction with the host computer and can also be used for online software upgrade; e. Collection and processing of 2-way speed frequency signals and 4-way switch input signals; f. 1 SPI communication interface reads the digital information of the ADC circuit, and the ADC circuit collects 6 analog voltage signals and 2 Pt46 resistance signals conditioned by the instrument amplifier; g. ADC and expansion circuit are used to read the motor voltage, current and Pt100 temperature signals, which are processed by the auxiliary control DSP to realize motor control analog information feedback and fault diagnosis; h. 2-way resolver excitation / decoding circuit outputs 2-way excitation EXC signals and collects position SIN / COS signals to realize rotor position collection of fuel pump motor and lubricating oil pump motor; i. 12-channel PWM control output signals are output to the motor windings through the power circuit to drive and control the motor, and read the fault status FAULT signal for power circuit fault status judgment.

[0031] The internal block diagram of the engine control SIP module is as follows: Figure 2 As shown, the design consists of two substrates, namely the main control board and the RDC board; The main control board includes a dual DSP minimum system circuit and an analog input signal acquisition and processing circuit.

[0032] The DSP processor in the dual-DSP minimum system circuit uses the domestic C2000 series DSP processor, which runs at a main frequency of 150MHz and integrates 18KB RAM and 128KB FLASH memory on the chip; the data interaction between the main control DSP and the auxiliary control DSP is realized through 2-way SCI communication interfaces; the digital information of the CAN-FD communication circuit is processed through 2-way SPI communication interfaces (McBSP compatible) for data interaction with the host computer and online software upgrade; the data interaction with the host computer and online software upgrade are realized through 2-way external SCI communication interfaces; the speed frequency information is read through 2-way CAP interfaces; the 4-way switch quantity information is read through 4-way IO interfaces; the digital information of the ADC circuit from the analog input signal acquisition and processing circuit is read through 1-way SPI communication interface; the motor voltage, current and Pt100 temperature information from the analog input signal acquisition and processing circuit are read through the on-chip ADC interface; the digital information from the resolver excitation / decoding circuit is read through 1-way SPI communication interface; the PWM control signal is output through 12-way PWM interface for motor control; the 2-way FAULT signal is read through 2-way IO interfaces for fault status reading.

[0033] The analog input signal acquisition and processing circuit is used for analog voltage 1-6 signal filtering acquisition, Pt46 platinum resistor signal conditioning filtering acquisition, Pt100 platinum resistor signal conditioning filtering and motor voltage and current signal filtering. Among them, the Pt46 and Pt100 platinum resistor signal conditioning both use instrument amplifiers to adjust the signal amplitude to meet the corresponding ADC range; the analog voltage 1-6 signals and the conditioned Pt46 platinum resistor signals use domestic 16-bit ADC chips for data acquisition, analog-to-digital conversion and then send to the dual DSP minimum system through the SPI interface; the conditioned Pt100 platinum resistor signals, motor voltage and current signals use the on-chip 12-bit ADC in the dual DSP minimum system for data acquisition and analog-to-digital conversion; the above analog signal filtering circuits are all RC passive filtering circuits to filter out interference signals during signal transmission.

[0034] The RDC board contains the resolver excitation / decoding circuitry.

[0035] The resolver excitation / decoding circuit outputs two sinusoidal excitation voltage signals with an output frequency range of 2kHz-20kHz and a maximum output amplitude of 20V. p-p , its amplitude can be adjusted by the operational amplifier, and the maximum driving current is 200mA; the sin-cos position signals corresponding to the two sinusoidal excitation voltage signals can be read, and the maximum position resolution is 16 bits; the read position information is sent to the dual DSP minimum system through the SPI interface.

[0036] In another embodiment of the present invention, the engine integrated controller based on the engine control SIP module adopts the VPX or VNX standard size or the customized size based on the installation method, and the electrical interconnection adopts the high-reliability connector to realize the corresponding functions of the engine integrated controller. According to the design idea of ​​the present invention, a hardware product of the engine integrated controller based on the engine control SIP module is developed, such as Figure 4 As shown, it includes a control board, a driver board, a power board, a filter component and a chassis, and each module is interconnected through a high-reliability connector. The system test results show that the engine integrated controller using the engine control SIP module has excellent performance and small size, which can meet the requirements of miniaturization, standardization, and low-cost control of the engine integrated controller put forward by the aviation engine system.

[0037] Compared with the traditional engine integrated controller hardware circuit, the integrated controller implemented by the dual-processor engine control SIP circuit module has the following advantages: Reduces the design complexity of the engine control system and improves the reliability of the engine control system The present invention also provides a working method of an engine control SIP module, comprising the following steps: The main control DSP receives the host computer command through the CANFD module interface or RS422 transceiver interface, and collects the engine status information through the speed interface, switch interface and analog input interface; The main control DSP generates control instructions based on the host computer instructions and engine status information; The auxiliary control DSP receives control instructions and collects motor status information through the analog input interface and resolver excitation / decoding interface to generate adjustment instructions; The auxiliary control DSP outputs adjustment instructions through the PWM output interface.

[0038] In detail, the host computer instructions received by the main control DSP are also engine status information. By comparing with the actual engine status information collected, a control instruction is generated. The control instruction should be the motor information required for the actual engine status to reach the ideal engine status issued by the host computer. The control instruction, i.e. the required motor information, is transmitted to the auxiliary control DSP. The auxiliary control DSP compares and processes the control instruction, i.e. the required motor information, with the actual motor status information collected, and generates an adjustment instruction, which is output to the motor winding through the power circuit to realize the drive and control of the motor.

[0039] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An engine control SIP module, characterized in that: It includes a main control DSP, an auxiliary control DSP, an analog input module and a resolver excitation / decoding module. The engine control SIP module is provided with a CANFD module interface, an RS422 transceiver interface, a speed interface, a switch quantity interface and an analog input interface connected to the main control DSP, and an RS422 transceiver interface, an analog input interface, a resolver excitation / decoding interface and a PWM output interface connected to the auxiliary control DSP; The main control DSP is used to receive engine status information and generate control instructions; The auxiliary control DSP is used to receive control instructions and motor status information from the main control DSP and output PWM control signals; The main control DSP and the auxiliary control DSP are connected via two SCIs, the analog input module is connected to the main control DSP and the auxiliary control DSP respectively, and the resolver excitation / decoding module is connected to the auxiliary control DSP.

2. An engine control SIP module according to claim 1, characterized in that: The CANFD module interface is bidirectionally connected to the main control DSP via two SPI channels.

3. The engine control SIP module according to claim 1, characterized in that: The main control DSP and the auxiliary control DSP are bidirectionally connected to the RS422 transceiver interface through SCI respectively.

4. The engine control SIP module according to claim 1, characterized in that: The engine control SIP module also includes a fault status judgment interface, and the fault status judgment interface and the auxiliary control DSP are connected via 2 IO channels.

5. The engine control SIP module according to claim 4, characterized in that: The fault status judgment interface is an input interface.

6. The engine control SIP module according to claim 1, characterized in that: The speed interface is connected to the main control DSP through two CAPs, the switch quantity interface is connected to the main control DSP through four IOs, and the PWM output interface is connected to the auxiliary control DSP through twelve PWMs.

7. The engine control SIP module according to claim 1, characterized in that: The resolver excitation / decoding module is connected to the auxiliary control DSP via SPI.

8. The engine control SIP module according to claim 1, characterized in that: The analog input module is connected to the main control DSP via SPI, and the analog input module is directly connected to the on-chip AD of the auxiliary control DSP.

9. The engine control SIP module according to claim 1, characterized in that: The main control DSP, the auxiliary control DSP and the analog input module are integrated on the main control board, the resolver excitation / decoding module is arranged on the RDC board, and the main control board is connected with the RDC board.

10. A method for operating an engine control SIP module, characterized in that: The engine control SIP module according to any one of claims 1 to 9 comprises the following steps: The main control DSP receives the host computer command through the CANFD module interface or RS422 transceiver interface, and collects the engine status information through the speed interface, switch interface and analog input interface; The main control DSP generates control instructions based on the host computer instructions and engine status information; The auxiliary control DSP receives control instructions and collects motor status information through the analog input interface and resolver excitation / decoding interface to generate adjustment instructions; The auxiliary control DSP outputs adjustment instructions through the PWM output interface.

Images