Electrical design method based on system model

Abstract

The invention belongs to the field of electrical design, and particularly relates to an electrical design method based on a system model, which comprises the following steps of: 1, analyzing an input demand of an electrical system; 2, constructing an internal information interaction model of the electrical system; 3, constructing an internal electrical interaction model of the electrical system; 4, performing physical implementation based on the electrical interaction model in the electrical system to obtain an electrical interaction design result; and 5, returning an electrical interaction design result to the electrical interaction model in the electrical system. According to the method, the problems of inconsistent design requirements, difficulty in tracing, lagging of electrical design verification and the like in the development process are solved, the reliability of electrical design is improved, and cost reduction and benefit increase of product development are realized.

Description

Technical Field

[0001] The invention belongs to the field of electrical design, and in particular relates to an electrical design method based on a system model. Background Art

[0002] In the development process of some equipment, such as inertial measurement devices, designers need to complete the scheme design and production according to the inertial measurement device task book or input requirements. Electrical design verification can only be carried out after the inertial measurement device is physically assembled. During the development and production process, some problems such as changes in input requirements not being transmitted downward in a timely manner, existing design defects and human errors may not be exposed until the physical verification. In order to meet the requirements of the task book, the original design needs to be adjusted or even overturned, causing problems such as repeated design processes, increased development costs, and extended development cycles. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is how to provide an electrical design method based on a system model to solve the problems of repeated electrical design process and delayed design verification in the traditional development mode.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes an electrical design method based on a system model, which comprises the following steps:

[0007] Step 1: Analyze the input requirements of the electrical system;

[0008] Step 2: Construct the internal information interaction model of the electrical system;

[0009] Step 3: Construct the internal electrical interaction model of the electrical system;

[0010] Step 4: Perform physical implementation based on the internal electrical interaction model of the electrical system to obtain the electrical interaction design results;

[0011] Step 5: Feed the electrical interaction design results back to the electrical interaction model inside the electrical system.

[0012] Furthermore, the first step specifically includes: performing demand analysis from the task book requirements, stakeholders, use cases, activities and surrounding environment of the electrical system to obtain the system requirement table.

[0013] Furthermore, the second step specifically includes: constructing an internal information interaction model of the electrical system through an IBD diagram in the system modeling software, adding proxy ports to the sub-component model blocks with information interaction, adding information flows to the connecting lines, and electrically defining the information flows, wherein the information flows are power energy flows, digital information flows, or analog information flows.

[0014] Furthermore, the third step specifically includes:

[0015] Adding full ports to the component model block, wherein the full ports represent the physical ports actually formed by the sub-components;

[0016] If two components need to be connected by independent cables, add a cable model block;

[0017] On the IBD diagram frame, proxy ports are used to represent the external ports of the component and are connected to the corresponding full ports of the component.

[0018] A node definition design table for each circuit module is formed in the internal electrical interaction model of the electrical system.

[0019] Furthermore, the fourth step specifically includes:

[0020] Define the electrical connector model for each full port in the electrical system. According to the information flow in the port, combined with the current carrying capacity of a single node of the connector, and considering the redundant design, determine the minimum number of nodes of the connector. Then, combine the design constraints such as error-proofing design and plug-in / plug-out relationship to determine the model specifications of the electrical connector.

[0021] Construct node attributes and associate them with corresponding ports, clarify input and output attributes, and form a node definition design result table.

[0022] Furthermore, the fourth step also includes: automatically checking the matching of the electrical connector model and node definition selected for each interface.

[0023] (III) Beneficial effects

[0024] The present invention develops an electrical design method for equipment based on a system model, ensures the consistency and traceability of the input requirements of the equipment throughout the entire development life cycle through modeling, and pre-places physical verification through simulation, thereby reducing the construction and maintenance costs of the actual physical system, improving project development efficiency, and enhancing the reusability of knowledge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of the present invention;

[0026] Figure 2 A system requirement table in a specific embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of an internal information interaction model of an electrical system in a specific embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of an internal electrical interaction model of an electrical system in a specific embodiment of the present invention;

[0029] Figure 5 A node definition design table in a specific embodiment of the present invention;

[0030] Figure 6 The node definition design result table of the AP2 electrical interface in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0032] In a specific embodiment of the present invention, Figure 1 As shown in the figure, the system model-based electrical design method for electrical systems includes:

[0033] Step 1: Analyze the input requirements of the electrical system.

[0034] Based on the requirements of the electrical system's task book, stakeholders, use cases, activities, and surrounding environment, we conduct demand analysis to obtain a system requirement table to guide subsequent modeling and design work, such as Figure 2 shown.

[0035] The second step is to build an internal information interaction model of the electrical system.

[0036] In the system modeling software supporting SysML language version 1.5, the internal information interaction model of the electrical system is constructed through the IBD diagram:

[0037] On the blocks of the sub-component models that have information exchange between each other, proxy ports are added respectively, and information flows are added on the connecting lines. The information flows can be power flow, digital or analog information flow;

[0038] These information flows are clearly electrically defined (such as voltage, current, electrical interconnection standards, etc.).

[0039] In a specific embodiment of the present invention, Figure 3 As shown in the figure, the modules in the electrical system and the link relationships and communication standards between them are preliminarily sorted out. The relevant modules and link relationships include:

[0040] Circuit A exchanges information with circuits B1, B2, and B3; Circuit A exchanges information with circuit C;

[0041] Circuit A exchanges information with external equipment, and external equipment refers to equipment that is independent of the electrical system and exchanges information with the electrical system;

[0042] The arrows on the lines between circuits indicate the direction of information flow. “Information 1 Collection (RS422)” indicates that circuit A sends a command to collect information 1 to circuit C through the RS422 protocol. “Reply to information 1” indicates that circuit C replies to circuit A with the corresponding information 1. “±5V power supply” information flow indicates that circuit A provides ±5V power supply to circuit C.

[0043] "Information 2 collection" means that circuit A sends information 2 collection to circuit B1, and "reply information 2" means that circuit B1 replies corresponding information 2 to circuit A. The information interaction between circuit B2 and circuit B3 and circuit A is the same as circuit B1.

[0044] According to the above-mentioned representation method, information 3 can be collected, replied, and current supply between circuits can be set or other information can be transmitted in the model.

[0045] Step 3: Sort out electrical correlations and build an internal electrical interaction model of the electrical system.

[0046] The establishment of electrical connection relationship is the key to realizing the information interaction function. Therefore, based on the internal information interaction requirements of the system, the internal electrical relationship of the system is sorted out, the internal electrical interaction model of the electrical system is constructed, and the electrical interaction relationship, interaction method and required electrical interface between each circuit module are determined.

[0047] Conduct electrical interconnection design, analyze the information flow on the proxy ports of each component in the internal block diagram (IBD diagram) of the internal information interaction model of the electrical system, perform appropriate splitting and merging, and build the internal electrical interaction model of the electrical system through the IBD diagram in the system modeling software with reference to the system structure layout:

[0048] 1. Add a full port to the component model block to indicate the physical port actually formed by the sub-component.

[0049] 2. If two components need to be connected by an independent cable, a new cable model block (Block) must be added.

[0050] 3. On the IBD diagram frame, a proxy port is used to represent the port that the component leads out to the outside, and it is connected to the corresponding full port of the component.

[0051] In a specific embodiment of the present invention, Figure 4 As shown, circuit A electrically interacts with external devices of the system through interface AP3 and interface X2, where AP3 is the interface of circuit A, and X2 is equivalent to interface AP3. The above method indicates that interface AP3 is the external interface of the system;

[0052] Circuit A electrically interacts with circuit C via interface AP2 and interface CP1, where AP2 is the interface of circuit A and CP1 is the interface of circuit C;

[0053] Since the interactive information between circuit B1, circuit B2, circuit B3 and circuit A are the collection commands and replies of "information 2" and ±15V power supply, the W1G three-in-one cable is designed in combination with the structural layout of the system to realize the electrical connection between circuit A and circuit B1, circuit B2, circuit B3. One end of the cable is connected to circuit B1, circuit B2, circuit B3 through interfaces W1, W2, W3 respectively, and the other end electrically interacts with circuit A through interface W4 and interface AP1.

[0054] At this point, the electrical interactions and interaction methods between all modules within the electrical system are clarified, and at the same time, a node definition design table for each circuit module is formed in the electrical interaction model within the electrical system, such as Figure 5 shown.

[0055] Step 4: Perform physical implementation based on the internal electrical interaction model of the electrical system to obtain the electrical interaction design results.

[0056] The physical implementation mainly includes:

[0057] 1. Electrical connector selection, that is, defining the electrical connector model for each full port in the electrical system.

[0058] According to the information flow within the port, combined with the current-carrying capacity of a single node of the connector, and taking into account redundant design, the minimum number of nodes of the connector is determined; then the model specifications of the electrical connector are determined in combination with other design constraints such as error-proofing design and plug-in / plug-out relationships.

[0059] In a specific embodiment of the present invention, the electrical interface and its connection method are obtained from the internal electrical interaction model of the electrical system, the applicable electrical connector model and specification are selected according to the physical design, and they are updated to the internal electrical interaction model of the electrical system (constructed with an IBD diagram), and the interface (port) is named as "code: model specification".

[0060] 2. Node definition configuration.

[0061] Construct node properties (Flow Porperty) and associate them with corresponding ports, clarify input and output properties, and form a node definition design result table.

[0062] In a specific embodiment of the present invention, the selected electrical connector is configured to clarify the interface code, node number, signal characteristics and signal attributes, and obtain a node definition design result table, such as Figure 6 shown.

[0063] In a specific embodiment of the present invention, the physical implementation may further include a matching check, which automatically checks the matching of the electrical connector model and the node definition selected for each interface to ensure the accuracy of the electrical connector and the node definition.

[0064] Step 5: Feed the electrical interaction design results back to the electrical interaction model inside the electrical system.

[0065] The results of the physical realization in the fourth step are fed back to the internal electrical interaction model of the electrical system. The updated internal electrical interaction model of the electrical system carries the electrical design scheme and the electrical design results. The interface, interaction information, node definition and other information of the electrical design can be obtained through the internal electrical interaction model of the electrical system.

[0066] The present invention utilizes system models instead of design documents, thereby improving the reliability of electrical design, achieving cost reduction and efficiency improvement in product development, and solving problems such as inconsistent design requirements and difficulty in tracing, and delayed electrical design verification during the development process.

[0067] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electrical design method based on a system model, characterized in that: The steps include: Step 1: Analyze the input requirements of the electrical system; Step 2: Construct the internal information interaction model of the electrical system; Step 3: Construct the internal electrical interaction model of the electrical system; Step 4: Perform physical implementation based on the internal electrical interaction model of the electrical system to obtain the electrical interaction design results; Step 5: Feed the electrical interaction design results back to the electrical interaction model inside the electrical system.

2. The electrical design method based on system model according to claim 1, characterized in that: The first step specifically includes: conducting demand analysis based on the electrical system's task book requirements, stakeholders, use cases, activities, and surrounding environment to obtain the electrical system requirement table.

3. The electrical design method based on system model according to claim 2, characterized in that: The second step specifically includes: constructing an internal information interaction model of the electrical system through an IBD diagram in the system modeling software, adding proxy ports to the sub-component model blocks with information interaction, adding information flows to the connecting lines, and electrically defining the information flows, wherein the information flows are power supply energy flows, digital information flows, or analog information flows.

4. The electrical design method based on system model according to claim 3, characterized in that: The third step specifically includes: Adding full ports to the component model block, wherein the full ports represent the physical ports actually formed by the sub-components; If two components need to be connected by independent cables, add a cable model block; On the IBD diagram frame, proxy ports are used to represent the external ports of the component and are connected to the corresponding full ports of the component. A node definition design table for each circuit module is formed in the internal electrical interaction model of the electrical system.

5. The electrical design method based on system model according to claim 4, characterized in that: The fourth step specifically includes: Define the electrical connector model for each full port in the electrical system. According to the information flow in the port, combined with the current carrying capacity of a single node of the connector, and considering the redundant design, determine the minimum number of nodes of the connector. Then, combine the design constraints such as error-proofing design and plug-in / plug-out relationship to determine the model specifications of the electrical connector. Construct node attributes and associate them with corresponding ports, clarify input and output attributes, and form a node definition design result table.

6. The electrical design method based on system model according to claim 5, characterized in that: The fourth step also includes: automatically checking the matching of the electrical connector model and node definition selected for each interface.

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