Measurement and control power supply function unit digital simulation modeling method and system

Abstract

The invention discloses a digital simulation modeling method and system for a measurement and control power supply function unit, and relates to the technical field of digital modeling of power supply function units. Power supply function modeling: constructing a signal source; setting model circuit parameters; different signal sources are connected with a resistor according to the types of the signal sources, the resistor is connected with a control switch, and basic function modeling of the power supply is completed; after power supply basic function modeling is completed, protection function modeling connection is carried out based on a power supply interface, and protection function setting is completed; setting a model to output an electric energy condition outwards, and outputting a controlled model; power supply model integration is realized based on the constructed power supply interface and power supply function; and performing fault simulation based on the integrated power supply model. The design of the power supply unit responds to the urgent demands of improving the digitization level of the measurement and control system and shortening the research and development period.

Description

Technical Field

[0001] This invention relates to the field of digital modeling technology for power supply functional units, and more specifically to a digital simulation modeling method and system for measurement and control power supply functional units. Background Technology

[0002] Measurement and control systems are crucial in modern engineering, industry, and scientific research, ensuring the stable and efficient operation of equipment in complex environments. Fields such as aerospace, automated production, and medical instruments rely on real-time feedback and adjustment to optimize performance, conserve resources, and ensure safety. With technological advancements, measurement and control systems need to improve their intelligence and automation levels to cope with multitasking and complex environments. However, current equipment suffers from low levels of digitization, long development cycles, and inefficient traditional development models, making it difficult to identify problems promptly. Therefore, improving digitization and shortening development cycles have become urgent needs.

[0003] Therefore, digital modeling and simulation technologies are crucial, enabling early identification of technical defects, shortening R&D cycles, and improving equipment reliability. Modular, unit-level modeling allows for flexible adjustments and reuse, avoiding the need for starting from scratch each time, reducing costs, and improving development efficiency. Among these units, the power supply functional unit plays a vital role in various measurement and control equipment and systems, providing stable power support. Whether in automated testing systems, data acquisition systems, laboratory power supply equipment, or industrial automation and aerospace measurement and control systems, the power supply functional unit ensures the normal operation of equipment and systems, guaranteeing the accuracy and reliability of testing and monitoring. By providing appropriate voltage, current, and frequency output, the power supply unit provides the necessary power to the equipment, supporting the stable and efficient operation of the entire measurement and control system.

[0004] Therefore, digital simulation of the power supply functional unit is used to construct a measurement and control functional unit library, effectively addressing the current problems of low digitization and long development cycles in measurement and control equipment. Simultaneously, the power supply functional unit provides suitable electrical signal output functions for most measurement and control equipment, thereby ensuring the normal operation of the equipment system. Summary of the Invention

[0005] In view of this, the present invention provides a digital simulation modeling method and system for a power supply functional unit in measurement and control. The design of the power supply unit responds to the urgent need to improve the digitalization level of measurement and control systems and shorten the R&D cycle. Through digital modeling and simulation technology, the digital simulation of the power supply functional unit not only solves the efficiency problem in the traditional R&D model, but also provides reliable power output support for a wider range of measurement and control equipment, ensuring the normal operation of the equipment and the stability of the system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A digital simulation modeling method for a measurement and control power supply functional unit includes:

[0008] Power interface construction;

[0009] Power supply function modeling includes: constructing signal sources; setting model circuit parameters; connecting different signal sources with resistors according to the signal source type, connecting resistors with control switches, and completing the basic power supply function modeling; after completing the basic power supply function modeling, performing protection function modeling and connection based on the power supply interface, and completing the protection function settings; setting the conditions for the model to output electrical energy, and outputting the controlled model.

[0010] Power model integration is achieved based on the constructed power interface and power functions;

[0011] Fault simulation based on integrated power supply model.

[0012] Preferably, the power interface includes a switch control interface, an analog circuit interface, and a warning signal interface;

[0013] The switch control interface is used to control the power supply to start and stop via control parameters;

[0014] Analog circuit interfaces are used to form power output loops;

[0015] The warning signal interface is used to monitor whether the output voltage and output current in the power output circuit exceed the warning threshold and to issue a warning signal.

[0016] Preferably, the signal source types include voltage sources and current sources. Voltage sources include DC voltage sources, stepped voltage sources, sinusoidal voltage sources, or pulse voltage sources, and current sources include DC current sources, stepped current sources, sinusoidal current sources, or pulse current sources.

[0017] Preferably, different signal sources are connected to resistors according to the type of signal source, including:

[0018] For voltage sources, the signal source is connected in series with the resistor; for current sources, the signal source is connected in parallel with the resistor.

[0019] Preferably, the model circuit parameter settings include output voltage settings, output current settings, internal resistance value settings, and warning threshold settings.

[0020] Preferably, protection function modeling and connection are based on the power interface, specifically including:

[0021] The switch control interface is connected to the control switch;

[0022] The analog circuit interface includes a negative interface and a positive interface. The negative interface is connected to the control switch, and the positive interface is connected to the signal source. The positive and negative interfaces are connected to the external power circuit to form a loop.

[0023] The warning signal interface is connected to the negative interface and the positive interface respectively.

[0024] Preferably, completing the protection function settings includes:

[0025] The warning signal interface determines whether the output voltage or output current exceeds the warning threshold. If it does, a warning signal is issued and the signal source output value is set to 0. Otherwise, the power module operates normally.

[0026] Preferably, the model is set to output electrical energy under certain conditions, and the controlled output model is specifically configured as follows:

[0027] The external control parameters are monitored through the switch control interface. When the control parameter is 0, the power is turned off by opening the control switch. When the control parameter is 1, the power is turned on by closing the control switch.

[0028] Preferably, the fault simulation includes overvoltage simulation and short-circuit simulation.

[0029] A digital simulation system for a measurement and control power supply functional unit, comprising:

[0030] Interface modeling module: used to build power interfaces;

[0031] Functional Modeling Module: Used for power supply function modeling, including: constructing signal sources; setting model circuit parameters; connecting different signal sources with resistors according to the signal source type, connecting resistors with control switches to complete the basic function modeling of the power supply; after completing the basic function modeling of the power supply, performing protection function modeling and connection based on the power supply interface, and completing the protection function settings; setting the conditions for the model to output electrical energy, and outputting the controlled model.

[0032] Power Model Integration Module: Used to integrate power models based on the constructed power interfaces and power functions;

[0033] Fault Modeling Module: Used for fault simulation based on an integrated power supply model.

[0034] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a digital simulation modeling method and system for a power supply functional unit. Through modular unit-level modeling, different power supply modules can be flexibly reused and adjusted, which not only reduces modeling costs and development cycle, but also significantly improves development efficiency. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 The flowchart of a digital simulation modeling method for a power supply functional unit provided by the present invention is shown.

[0037] Figure 2 The overall simulation structure diagram provided for this invention.

[0038] Figure 3 This is the overall modeling circuit diagram of the DC voltage source of the present invention.

[0039] Figure 4 This is a simulation circuit.

[0040] Figure 5 The diagram shows the verification results of the frequency amplitude setting for the experimental simulation circuit of this invention.

[0041] Figure 6 The diagram shows the verification results of the duty cycle setting in the experimental simulation circuit of this invention.

[0042] Figure 7 The diagram shows the verification results of the protection mechanism of the experimental simulation circuit of this invention.

[0043] Figure 8 This is a schematic diagram of a digital simulation system for a measurement and control power supply functional unit provided by the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] This invention discloses a digital simulation modeling method for a measurement and control power supply functional unit, such as... Figure 1 and Figure 2 As shown, it includes:

[0046] The power interface provides a channel for interaction between the power supply and the outside world. The analog circuit interface connects to the external power circuit, and the power supply model functions for the external circuit through this interface. The switch control interface reads external control parameters and controls the opening and closing of the power supply model. The warning signal interface monitors the internal parameters of the power supply in real time and compares them with the warning threshold parameters. When the internal parameters of the power supply are detected to be too high, a warning signal is output to the outside, and the power supply output value is set to 0.

[0047] Power supply function modeling includes: constructing signal sources; setting model circuit parameters; connecting different signal sources with resistors according to the signal source type, connecting resistors with control switches, and completing the basic power supply function modeling; after completing the basic power supply function modeling, performing protection function modeling and connection based on the power supply interface, and completing the protection function settings; setting the conditions for the model to output electrical energy, and outputting the controlled model.

[0048] The power supply model is integrated, which integrates and constructs various current source and voltage source models, and builds a set of basic functional units for measurement and control power supply, which can be selected for modeling work of measurement and control system.

[0049] The simulation fault design constructs fault models for common power supply fault modes—overvoltage and open circuit—for reference in the fault simulation of measurement and control systems.

[0050] The modeling process of this invention will be described in detail below.

[0051] (1) Power interface construction:

[0052] Table 1 Power Interface Design

[0053]

[0054]

[0055] Analog Circuit Interface: During the establishment of the power supply model, the analog circuit positive and negative interface components in the Modelica electrical simulation library are first called as the analog circuit interface of the power supply. This interface is the basic model of the power supply functional unit, realizing the basic functions of the power supply. The external power supply circuit will be connected to this interface, and power will be supplied to the power supply circuit through this interface during the simulation.

[0056] The warning signal interface is implemented by calling the real output interface in the Modelica basic module. In the simulation, this interface monitors the output current or output voltage values ​​inside the power module in real time and outputs a signal to the outside indicating whether the power supply is working properly.

[0057] The switching control interface is implemented by calling the real input interface in the Modelica basic module. In the simulation, this interface receives control parameter signals from the outside in real time, and controls the switching state of the power supply model accordingly.

[0058] (2) Power Function Modeling

[0059] The power supply modeling approach is divided into two parts: signal source modeling and internal power supply composition. During modeling, the signal source and internal resistance are connected in parallel or series depending on the power supply type (current or voltage source) to simulate the power supply's current / voltage output characteristics and internal resistance characteristics. Then, a protection function is introduced to monitor the power supply's output voltage and current in real time, stopping power supply when these values ​​exceed a protection threshold. Finally, an output control function is introduced, using an external control switch to determine the power supply model's operating state. The internal composition of the power supply is analyzed first, as follows: Figure 3 The diagram shown is the internal schematic of the power supply, which consists of a signal source, resistors, control switches, and interface model.

[0060] The modeling process for each part will be described below:

[0061] (2-1) Signal source modeling:

[0062] First, construct a signal source. The signal source serves as the output energy of the power supply model and has a fixed voltage / current output function to provide stable power output to the circuit. Signal sources include DC voltage sources, DC current sources, stepped voltage sources, stepped current sources, sinusoidal voltage sources, sinusoidal current sources, pulse voltage sources, or pulse current sources.

[0063] (2-2) Define the main parameters:

[0064] Output voltage / current: For voltage sources, the main parameter is the output voltage, which is 15V by default; for current sources, the main parameter is the output current, which is 1A by default.

[0065] Internal resistance: The internal resistance characteristic of the power supply, with a default internal resistance value of 15Ω;

[0066] Warning thresholds for voltage and current: When the voltage or current exceeds the threshold, the power supply output is reduced to zero through internal judgment logic.

[0067] (2-3) Modeling of basic power supply functions

[0068] Based on the constructed signal source model, it is connected to the resistor model to simulate the power output-internal resistance characteristics of the power supply. For the voltage source model, the signal source is connected in series with the resistor; for the current source model, the signal source is connected in parallel with the resistor. This model is then connected to a control switch and an analog circuit interface to form the basic functional model of the power supply.

[0069] (2-4) Protection Function Modeling

[0070] After completing the basic power supply function modeling, protection function modeling and connection are performed based on the power supply interface. Specifically, the switch control interface is connected to the control switch; the analog circuit interface includes a negative interface and a positive interface. The negative interface is connected to the control switch, and the positive interface is connected to the signal source. The positive and negative interfaces are connected to the external power supply circuit to form a loop; the warning signal interface is connected to the negative and positive interfaces respectively.

[0071] The protection function is implemented by setting the internal equations of the power supply model. Specifically, the output current or output voltage of the power supply model is monitored in real time. The output voltage or output current is judged through the warning signal interface to determine whether it exceeds the warning threshold. When the output value is detected to be greater than the warning value, a warning signal is output to the outside, and the signal source output is set to 0 at the same time.

[0072] (2-5) Modeling of controlled output functions:

[0073] The output control function is used to detect external control parameters and determine whether the power supply model outputs electrical energy. Specifically, equations are defined inside the power supply model to monitor the switch control interface signal in real time. When the control parameter is 1, the control switch is closed, and the power supply model outputs electrical energy normally; when the control parameter is 0, the control switch is open, and the power supply model disconnects from the outside world.

[0074] (3) Power model integration:

[0075] In this step, based on the constructed signal sources and functional modules, these modules are integrated into a resource package using a packaging statement, and a basic functional model is defined outside the package. Then, combined with the previously defined signal source model and other power supply components, different types of power supply models with outputs are integrated.

[0076] To ensure the scalability and flexibility of the model, a replacement selection statement is used to limit the selection range of functional models, allowing users to select different types of power supply models as needed.

[0077] (4) Fault simulation modeling

[0078] (4-1) Simulating Overvoltage: Overvoltage refers to the output voltage of a power supply exceeding its rated voltage. It can be simulated by multiplying the voltage supplied to the power-receiving device by a factor greater than 1. Declare an overvoltage power supply model and define an overvoltage factor parameter (e.g., 1.2) to represent the voltage gain under overvoltage conditions. Use a constant signal type as the signal source and set the normal rated voltage. Based on the normal voltage signal, add a gain module to multiply the voltage by the overvoltage factor to simulate the overvoltage situation.

[0079] (4-2) Simulating a Short Circuit: A short circuit occurs when the current increases sharply while the output voltage approaches zero. This can be simulated by reducing the voltage to almost zero while allowing the current to approach a certain limit. Declare a short-circuit power supply model. Set the voltage to almost zero (e.g., set the voltage to 0.1 or less using a constant module). Set the current to the limit of the rated current; a high gain factor can be used to simulate the current surge (e.g., a short-circuit factor of 10).

[0080] The present invention is as follows Figure 4 The circuit shown is simulated to verify whether the functional characteristics of the DC voltage source meet the requirements.

[0081] Depend on Figure 5 As can be seen, the red line represents the rated output voltage, the blue line represents the actual output voltage of the power supply, and the green line represents the external controlled signal. Figure 5 The left part shows the set voltage of 20V and frequency of 2Hz. At this time, the output voltage signal is not affected by the external controlled source. Figure 5 The right side shows a voltage amplitude of 10V, a frequency of 0.5Hz, and a control signal period of 2s with a duty cycle of 90%. Comparing the two figures, it can be seen that the output current can be controlled by adjusting different parameters such as frequency, amplitude, and the duty cycle of the external controlled source, indicating that the power supply unit can operate normally according to the parameter settings.

[0082] Depend on Figure 6 As can be seen, a DC voltage source simulation was performed. The red line represents the rated output voltage, the blue line represents the actual output voltage of the power supply, and the green line represents the external controlled signal. The voltage in the left figure is 10 and the duty cycle is 0.5; the voltage in the right figure is 20 and the duty cycle is 0.9. This example shows that the duty cycle and waveform of the output signal can be controlled by modifying the control mode.

[0083] Will Figure 4 The power supply in the circuit was replaced with a sinusoidal AC power supply for simulation to verify whether the power supply unit can cut off the current in time and thus protect the circuit when the output current and voltage exceed the user setting.

[0084] Depend on Figure 7 As can be seen, the green line represents the current passing through the resistor, and the red line represents the pulse control signal. The entire circuit is disconnected at approximately 0.1 seconds, and the output current is approximately 0, indicating that the protection switch is disconnected at this time. Furthermore, the warning interface outputs false, indicating that the protection circuit is correctly cut off at this time.

[0085] This invention provides a digital simulation system for a measurement and control power supply functional unit, such as... Figure 8 As shown, it includes:

[0086] Interface modeling module: used to build power interfaces;

[0087] Functional Modeling Module: Used for power supply function modeling, including: constructing signal sources; setting model circuit parameters; connecting different signal sources with resistors according to the signal source type, connecting resistors with control switches to complete the basic function modeling of the power supply; after completing the basic function modeling of the power supply, performing protection function modeling and connection based on the power supply interface, and completing the protection function settings; setting the conditions for the model to output electrical energy, and outputting the controlled model.

[0088] Power Model Integration Module: Used to integrate power models based on the constructed power interfaces and power functions;

[0089] Fault Modeling Module: Used for fault simulation based on an integrated power supply model.

[0090] The specific implementation process and method of the system in this embodiment are the same, and will not be repeated here.

[0091] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0092] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A digital simulation modeling method for a TT&C power function unit, characterized in that, The method comprises the following steps: Power interface construction; Power function modeling, including: constructing a signal source; setting model circuit parameters; connecting different signal sources with resistors according to signal source types, connecting resistors and control switches, and completing basic power function modeling; after completing basic power function modeling, connecting protection function modeling based on the power interface, and completing protection function setting; setting model external output power conditions, and outputting a controlled model; Integrating power models based on the constructed power interface and power function; Fault simulation based on integrated power models.

2. The digital simulation modeling method of a TT&C power supply functional unit according to claim 1, characterized in that, The power interface comprises a switch control interface, an analog circuit interface, and a pre-warning signal interface; The switch control interface is used to control power start and stop through control parameters; The analog circuit interface is used to form a power output loop; The pre-warning signal interface is used to monitor whether the output voltage and output current in the power output loop exceed the pre-warning threshold, and to send a pre-warning signal.

3. The digital simulation modeling method of a TT&C power supply functional unit according to claim 1, characterized in that, The signal source types include voltage sources and current sources, and the voltage sources include direct current voltage sources, step voltage sources, sinusoidal voltage sources, or pulse voltage sources, and the current sources include direct current current sources, step current sources, sinusoidal current sources, or pulse current sources.

4. The digital simulation modeling method of a TT&C power supply functional unit according to claim 3, characterized in that, Connecting different signal sources with resistors according to signal source types comprises: For voltage sources, connecting the signal source with the resistor in series, and for current sources, connecting the signal source with the resistor in parallel.

5. The method of claim 2, wherein the method further comprises: The model circuit parameter setting comprises output voltage setting, output current setting, resistor resistance value setting, and pre-warning threshold setting.

6. The digital simulation modeling method of a TT&C power supply functional unit according to claim 5, characterized in that, Connecting protection function modeling based on the power interface comprises: The switch control interface is connected with the control switch; The analog circuit interface comprises a negative interface and a positive interface, the negative interface is connected with the control switch, the positive interface is connected with the signal source, and the positive interface and the negative interface are connected with external power circuits to form a loop; The pre-warning signal interface is connected with the negative interface and the positive interface respectively.

7. The method according to claim 6, wherein, Completing protection function setting comprises: Judging whether the output voltage or the output current exceeds the pre-warning threshold through the pre-warning signal interface, if yes, sending a pre-warning signal, and setting the signal source output value to 0, otherwise, the power module operates normally.

8. The digital simulation modeling method of a TT&C power supply functional unit according to claim 2, characterized in that, Setting model external output power conditions, and outputting a controlled model specifically comprises: Monitoring external control parameters through the switch control interface, when the control parameter is 0, turning off the control switch to turn off the power, and when the control parameter is 1, turning on the control switch to turn on the power.

9. The digital simulation modeling method of a TT&C power supply functional unit according to claim 1, characterized in that, The fault simulation comprises overvoltage simulation and short circuit simulation.

10. A digital simulation system of a TT&C power function unit, characterized in that, The method comprises the following steps: Interface modeling module: used for constructing a power interface; Function modeling module: used for power function modeling, including: constructing a signal source; setting model circuit parameters; connecting different signal sources with resistors according to signal source types, connecting resistors and control switches, and completing basic power function modeling; after completing basic power function modeling, connecting protection function modeling based on the power interface, and completing protection function setting; setting model external output power conditions, and outputting a controlled model; Power model integration module: used for integrating power models based on the constructed power interface and power function; Fault modeling module: used for fault simulation based on integrated power models.

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