A continuous variable speed regulation experiment system and method for marine ballast

Abstract

The application belongs to the technical field of variable speed regulation, and discloses a continuous variable speed regulation experiment system and method for ship ballast, which comprises a ballast water hardware system and an upper computer remote control system; the ballast water hardware system comprises a water tank, a water pump control system and a remote communication system, and the water pump control system comprises a PLC master control and a pipeline system; the application develops a ballast water control system for model test, which can be used to replace the pressure iron to realize the adjustment of the draft and improve the efficiency. The application simulates the real ship ballast process and realizes the automatic control of the ballast process. The application saves the time for the ballast condition adjustment process in the model test and improves the test efficiency. The application realizes the state simulation of the ship model under the complex sea conditions in the dynamic adjustment process, and can realize the ballast condition adjustment at different speeds; the application breaks through the limitation of the test range and can carry out more experiments.

Description

Technical Field

[0001] This invention belongs to the field of variable speed regulation technology, and in particular relates to a marine ballast continuously variable speed regulation experimental system and method. Background Technology

[0002] Water tank model testing is a crucial method for evaluating the hydrodynamic performance of ships and marine structures. Compared to numerical calculations, model testing offers higher accuracy, and its labor and material costs are significantly lower than those of prototype testing. However, in scaled-down model testing, to better assess the hydrodynamic performance of ships and marine structures in different marine environments, multiple operational condition tests are often required. These different conditions necessitate adjustments to the model's weight and center of gravity. Traditional methods involve lifting the model out of the water tank, manually adjusting and measuring its weight and center of gravity using weights of varying sizes and weights, before returning it to the tank. This repeated lifting and lowering of the model is time-consuming and can easily damage the model's hull.

[0003] Ballast water systems are a crucial technology in shipping engineering and marine control. Ballast water regulates a ship's draft, balance, and stability by altering its volume, thus meeting the needs of safe navigation, changes in load conditions, and hull attitude control. Existing ballast water management systems primarily focus on ballast water treatment, replacement, and sensor-based monitoring and control logic design. This includes the configuration of traditional ballast piping, valves, and pumps, as well as basic human-machine interface displays and manual control strategies, all aimed at meeting the requirements of the International Maritime Organization (IMO) regarding ballast water treatment and management.

[0004] For example, in the prior art, multiple pumps and valves are used to move ballast water between different tanks, and an automatic control unit is used to monitor the liquid level to maintain the balance of the hull. However, this technology is mainly limited to pump start-stop control based on static target values, and lacks the ability to continuously adjust speed for the ballast process. It cannot achieve real-time closed-loop feedback and continuous speed control during the adjustment process.

[0005] Therefore, in the existing technology, there is no experimental control method that can continuously and variably adjust the ballast water flow and level based on real-time closed-loop feedback. In particular, there are still technical deficiencies in realizing multi-tank coordinated adjustment and continuous load condition change control, which makes it difficult to meet the requirements of high-precision ship model ballast experiments for continuous adjustment performance. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a marine ballast continuously variable speed adjustment experimental system and method.

[0007] This invention is implemented as follows: a marine ballast continuously variable speed adjustment experimental system includes:

[0008] Ballast water hardware system and host computer remote control system;

[0009] The ballast water hardware system includes a water tank, a water pump control system, and a remote communication system. The water pump control system includes a PLC main controller and a pipeline system.

[0010] The host computer remote control system is developed using QT5.9 and includes a ballast water discharge control module, a real-time interface display module, a data processing and storage module, and a system debugging module.

[0011] The ballast water pumping and draining control module is used to set the operating modes, including three operating modes: fixed load condition adjustment of the ship model, continuous adjustable speed change between two load conditions, and maintaining the ship's center of gravity inertia in harsh environments. The pumping / draining speed and operating time can be set. At the same time, each water pump and solenoid valve can be individually controlled, which is convenient for installation and debugging before the experiment.

[0012] A real-time interface display module is used to monitor the experimental process;

[0013] The data processing and storage module is used for post-processing of data after the experiment.

[0014] The system debugging module is used for equipment debugging before the experiment, providing assurance for the water tank experiment.

[0015] Furthermore, the PLC main controller, model EPC-200, is developed using C language for the underlying hardware, and the configuration software is written using ST structured text language. Two EA8 modules are added as interface expansion, which can connect to a larger number of sensors. It is connected to the WIFI transparent transmission module through an Ethernet structure, and a stable communication message format is designed.

[0016] Furthermore, the pipeline system consists of a water tank, a solenoid valve, an adjustable speed water pump, a level transmitter, and a flow meter.

[0017] Furthermore, each water tank can be equipped with a set of inlet pipes and a set of outlet pipes to exchange water with the outside of the ship, and water exchange between different water tanks can also be realized.

[0018] Furthermore, the level transmitter is placed inside the water tank; the ballast water hardware system is placed in the ship's hull compartment.

[0019] Furthermore, the remote communication system includes a Wi-Fi pass-through module of model HF2211.

[0020] Another objective of this invention is to provide a test method for continuous variable speed adjustment of marine ballast, comprising:

[0021] Step 1: The ship model is in a fixed, unloaded condition.

[0022] When a specific load condition needs to be achieved, the water tanks are positioned within the ship according to the pre-calculated water tank layout and ballast scheme. The ballast scheme is then manually set in the host computer control software, including setting the purge mode, purge speed to maximum, and stop level to the level corresponding to the fixed load condition. Clicking "Start Run" will cause the host computer to send a set of fixed-format communication messages to the PLC via UDP protocol. The PLC will parse the received messages, execute the instructions, and return an acknowledgment message of the received control instructions to the host computer. In addition, the PLC will collect the flow information of each pipeline and the level information of each water tank from the flow meter and level transmitter at a fixed frequency, package them, and send them to the host computer control terminal. The software will automatically parse the returned data, process it, plot it, and save it. The system will automatically stop when the target ballast scheme is achieved.

[0023] Step 2: The ship model alternates between empty and fully loaded states;

[0024] When continuous switching between two load conditions is required, the water tank layout and ballast scheme are pre-calculated, and the water tank positions are arranged in the hull according to the calculation. The ballast scheme is manually set in the host computer control software, the purge mode is set, and the purge speed can be adjusted according to experimental requirements. The stop liquid level is set to the liquid level corresponding to full load. Clicking "Start Run" will cause the host computer to send a set of fixed-format communication messages to the PLC via UDP protocol. The PLC will parse the received messages, execute the instructions, and return an acknowledgment message of the received control instructions to the host computer. In addition, the PLC will collect the flow information of each pipeline and the liquid level information of each water tank from the flow meter and level transmitter at a fixed frequency, package them, and send them to the host computer control terminal. The software will automatically parse the returned data, process, plot, and save it. The values ​​read by the sensors are compared with the target values ​​to achieve flow and liquid level closed loop. When the target ballast scheme is reached, the operation will automatically stop.

[0025] Step 3: Continuously adjust the center of gravity of the ship model load.

[0026] In complex sea conditions, the ship model may become unstable. When conducting tests under complex sea conditions, the current ballast status is manually set in the host computer control software to maintain the weight and center of gravity. The host computer will then send a set of fixed-format communication messages containing control commands to the PLC via the UDP protocol. The PLC will parse the received messages, execute the commands, and simultaneously return an acknowledgment message of the received control commands to the host computer. In addition, the PLC will collect the flow information of each pipeline and the liquid level information of each water tank from the flow meter and level transmitter at a fixed frequency, package them, and send them to the host computer control terminal. The software will automatically parse the returned data, process it, plot it, and save it. It will compare the values ​​read by the sensors with the target values ​​to achieve a closed loop for flow and liquid level. When the target ballast scheme is reached, the operation will automatically stop.

[0027] Another object of the present invention is to provide a computer device comprising a memory and a processor, the memory storing a computer program, which, when executed by the processor, causes the processor to perform the steps of the experimental method for continuous variable speed regulation of marine ballast.

[0028] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the experimental method for continuous variable speed regulation of marine ballast.

[0029] Another objective of this invention is to provide an information data processing terminal for implementing the marine ballast continuously variable speed adjustment experimental system.

[0030] Based on the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solution to be protected by this invention from the following aspects:

[0031] This invention aims to develop a continuously variable speed ballast adjustment system for scaled-down ship model experiments. The invention includes a ballast water control device, a host computer control and debugging system, and remote communication control for classifying, storing, and visualizing data from various sensors in the control system. During implementation, the ship model only needs to be hoisted once to achieve continuous adjustment of ballast weight, center of gravity position, and moment of inertia in the water. This significantly reduces experimental time costs and improves the safety factor of the experiment.

[0032] This invention develops a ballast water displacement control system for model testing, which can replace ballast irons to adjust draft, improving efficiency. It simulates the actual ship load adjustment process, achieving automatic and controllable load adjustment. This saves time used for load condition adjustment in model testing, improving test efficiency.

[0033] This invention enables the simulation of ship model states under complex sea conditions during dynamic adjustment, and allows for the adjustment of load conditions at different rates; it breaks through the limitations of the test range and allows for more experiments to be conducted. Attached Figure Description

[0034] Figure 1 This is a structural block diagram of the marine ballast continuously variable speed adjustment experimental system provided in the embodiments of the present invention.

[0035] Figure 2 This is a diagram of the host computer interface provided in an embodiment of the present invention.

[0036] Figure 3 This is a flowchart of the experimental method for continuous variable speed adjustment of marine ballast provided in the embodiments of the present invention.

[0037] In the diagram: 1. Ballast water hardware system; 2. Water tank; 3. Water pump control system; 4. Remote communication system; 5. Host computer remote control system; 6. Ballast water discharge control module; 7. Real-time interface display module; 8. Data processing and storage module; 9. System debugging module. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] like Figure 1 As shown, the marine ballast continuously variable speed adjustment experimental system provided in this embodiment of the invention includes:

[0040] Ballast water hardware system 1 and host computer remote control system 5;

[0041] The ballast water hardware system 1 includes a water tank 2, a water pump control system 3 and a remote communication system 4. The water pump control system includes a PLC main control and a pipeline system.

[0042] like Figure 2 As shown, the host computer remote control system 5 is developed using QT5.9 and includes a ballast water discharge control module 6, a real-time interface display module 7, a data processing and storage module 8, and a system debugging module 9.

[0043] The ballast water pumping and draining control module 6 is used to set the operating mode, including three operating modes: fixed load condition adjustment of the ship model, continuous adjustable speed change between two load conditions, and ship center of gravity inertia maintenance under harsh environment. The pumping / draining speed and running time can be set. At the same time, each water pump and solenoid valve can be individually controlled, which is convenient for installation and debugging before the experiment.

[0044] The real-time interface display module 7 is used to monitor the experimental process;

[0045] Data processing and storage module 8 is used for post-processing of data after the experiment.

[0046] System debugging module 9 is used for equipment debugging before the experiment, providing assurance for the water tank experiment.

[0047] The PLC main controller provided in this embodiment of the invention is model EPC-200. The hardware underlying is developed using C language, the configuration software is written using ST structured text language, and two EA8 modules are added as interface expansion, which can connect more sensors. It is connected to the WIFI transparent transmission module through Ethernet structure, and a stable communication message format is designed, thereby realizing the communication between the main control system and the host computer control system.

[0048] The pipeline system provided in this embodiment of the invention consists of a water tank, a solenoid valve, an adjustable speed water pump, a level transmitter, and a flow meter.

[0049] The water tanks provided in this embodiment of the invention can be equipped with a set of inlet pipes and a set of outlet pipes to exchange water with the outside of the ship, and water exchange between different water tanks can also be realized.

[0050] The liquid level transmitter provided in this embodiment of the invention is placed inside the water tank; the ballast water hardware system is placed in the ship's hull compartment.

[0051] The remote communication system provided in this embodiment of the invention includes a WiFi pass-through module of model HF2211.

[0052] like Figure 3 As shown, the experimental method for continuous variable speed adjustment of marine ballast provided in this embodiment of the invention includes:

[0053] This invention enables continuous variable-speed adjustment of the ballast weight, center of gravity, and inertia of a ship model.

[0054] S101, Ship model in unloaded fixed condition;

[0055] When a specific load condition needs to be achieved, the water tanks are positioned within the ship according to the pre-calculated water tank layout and ballast scheme. The ballast scheme is then manually set in the host computer control software, including setting the purge mode, purge speed to maximum, and stop level to the level corresponding to the fixed load condition. Clicking "Start Run" initiates the process. The host computer sends a set of communication messages in a fixed format to the PLC via UDP protocol. The PLC parses the received messages, executes the instructions, and returns an acknowledgment message of the received control instructions to the host computer. In addition, the PLC collects the flow information of each pipeline and the level information of each water tank from the flow meter and level transmitter at a fixed frequency, packages it, and sends it to the host computer control terminal. The software automatically parses the returned data, processes it, plots it, and saves it. The process automatically stops when the target ballast scheme is achieved, thus realizing the automatic and rapid switching between the two load conditions.

[0056] S102, the ship model can switch between empty and fully loaded states;

[0057] When continuous switching between two load conditions is required, the water tank layout and ballast scheme are pre-calculated, and the water tank positions are arranged in the hull according to the calculation. The ballast scheme is manually set in the host computer control software, the purge mode is set, and the purge speed can be adjusted according to experimental requirements. The stop liquid level is set to the liquid level corresponding to full load. Clicking "Start Run" will cause the host computer to send a set of fixed-format communication messages to the PLC via UDP protocol. The PLC will parse the received messages, execute the instructions, and return an acknowledgment message of the received control instructions to the host computer. In addition, the PLC will collect the flow information of each pipeline and the liquid level information of each water tank from the flow meter and level transmitter at a fixed frequency, package them, and send them to the host computer control terminal. The software will automatically parse the returned data, process, plot, and save it. The values ​​read by the sensors are compared with the target values ​​to achieve flow and liquid level closed loop. When the target ballast scheme is reached, the operation will automatically stop, thus realizing the continuous adjustable speed switching process between the two load conditions.

[0058] S103, Continuous adjustment of the center of gravity of the ship model load;

[0059] In complex sea conditions, the model ship may become unstable. When conducting tests under complex sea conditions, the current ballast status is manually set in the host computer control software to maintain the weight and center of gravity. The host computer will send a set of fixed-format communication messages containing control commands to the PLC via the UDP protocol. The PLC will parse the received messages, execute the commands, and return an acknowledgment message of the received control commands to the host computer. In addition, the PLC will collect the flow information of each pipeline and the liquid level information of each water tank from the flow meter and level transmitter at a fixed frequency, package them, and send them to the host computer control terminal. The software will automatically parse the returned data, process, plot, and save it. It will compare the values ​​read by the sensors with the target values ​​to achieve a closed loop for flow and liquid level. When the target ballast scheme is reached, the operation will automatically stop, thereby maintaining the weight and center of gravity of the model ship under complex sea conditions.

[0060] The marine ballast continuous variable speed adjustment experimental system of this invention uses an information data processing terminal as the core control unit. Through unified coordination of the ballast execution subsystem and the sensing and acquisition subsystem, it achieves continuous adjustment and stable control of the ship model's load conditions. Before the experiment begins, the information data processing terminal sets the target load condition parameters according to the experimental requirements, including the target liquid level distribution or the target load center of gravity state, and writes the corresponding control strategy into the memory, which is then scheduled and executed by the processor.

[0061] During the experimental operation, the ballast execution subsystem, under the control commands output by the processor, performs water filling or drainage operations on multiple ballast tanks, and the filling and drainage rates can be continuously varied during operation. Simultaneously, the sensing and acquisition subsystem collects real-time information on the liquid level of each tank and the flow rate of the corresponding pipelines, and feeds the collected data back to the information data processing terminal. The processor analyzes and calculates the real-time collected data, compares the current ballast state with the preset target load condition, and determines the state deviation.

[0062] Based on the aforementioned state deviation, the processor dynamically generates adjustment instructions to correct the operating state of the ballast execution subsystem, ensuring that the drainage speed is continuously adjusted according to the deviation, thus forming a closed-loop adjustment mechanism. As the real-time ballast state gradually approaches the target load condition, the processor automatically reduces the adjustment amplitude to keep the load condition change process smooth and stable; when the target load condition is reached, the processor selects to maintain the current state or terminate the ballast operation according to the experimental mode.

[0063] The computer equipment and computer-readable storage medium store and execute the above experimental method steps, enabling the information data processing terminal to complete experimental tasks such as fixed load condition adjustment, continuous load condition change and load center of gravity maintenance in different experimental scenarios, thereby achieving high precision, continuity and controllability of the marine ballast test process.

[0064] Example 1: Continuous Variable Speed ​​Ballast Test under Fixed Load Conditions

[0065] In this embodiment, a marine ballast continuously variable speed adjustment experimental system is used to conduct a ballast experiment on a ship model under fixed load conditions. Before the experiment begins, the target liquid level distribution of each ballast tank is determined according to the target load condition of the ship model, and the target load condition is input into the remote control subsystem. After the system starts, the ballast execution subsystem simultaneously pumps water into multiple ballast tanks, and the sensing and acquisition subsystem collects the liquid level information of each tank and the flow information of the corresponding pipeline in real time, and transmits the collected data to the remote control subsystem.

[0066] During ballasting, the remote control subsystem continuously compares real-time liquid level information with the target liquid level and dynamically adjusts the water pumping speed based on the deviation, ensuring continuous variation in the pumping speed throughout the operation. Once the liquid level in each tank reaches the range corresponding to the target load condition, the system automatically reduces the pumping speed and stops the ballasting operation, thus achieving stable ballasting under fixed load conditions. This embodiment verifies the system's ability to achieve continuous variable speed control through closed-loop feedback during fixed load condition adjustment.

[0067] Example 2: Continuous transition between no-load and full-load states

[0068] In this embodiment, the system is used to conduct a continuous load condition change experiment on the ship model from an empty state to a fully loaded state. During the experiment, the remote control subsystem sets the fully loaded state as the target load condition, and the ballast execution subsystem performs ballasting at a high water injection rate in the initial stage to shorten the overall experiment time. The sensing and acquisition subsystem acquires liquid level and flow information in real time and updates it to the remote control subsystem at a predetermined frequency.

[0069] As the ballast process progresses and the real-time liquid level gradually approaches the target level, the remote control subsystem gradually reduces the water pumping speed according to the liquid level change trend. This ensures that the ballast process exhibits continuous and smooth changes, avoiding adverse effects on the model's attitude caused by sudden changes in load conditions. This embodiment demonstrates that the system can achieve continuous transitions between different load conditions and achieve a smooth transition through continuous speed adjustment, supporting the claims of the continuously variable speed control system.

[0070] Example 3: Multi-tank coordinated ballast regulation

[0071] In this embodiment, the system is equipped with multiple independent ballast tanks, distributed at different locations on the ship model to simulate different load distributions. The remote control subsystem generates a multi-tank coordinated ballast scheme based on the target load conditions, enabling different tanks to execute different pumping and draining strategies during the same experiment. The sensing and acquisition subsystem collects the liquid level and flow rate information of each tank, achieving multi-channel status perception.

[0072] During ballasting, the remote control subsystem comprehensively analyzes the liquid level changes in each water tank and dynamically adjusts the corresponding pumping and draining speeds of each tank, enabling the tanks to operate collaboratively at different speeds, thereby achieving coordinated adjustment of the overall load distribution of the ship model. This embodiment illustrates that the system can not only adjust a single water tank but also achieve multi-tank collaborative closed-loop control, thus supporting the relevant claims regarding multi-tank collaborative adjustment.

[0073] Example 4: Load Center of Gravity Dynamic Holding Experiment

[0074] In this embodiment, the system is used to simulate an experimental scenario of maintaining the center of gravity of a ship model load under complex conditions. At the start of the experiment, the remote control subsystem sets the target load center of gravity based on the current ballast state and switches the system to the center of gravity maintenance mode. In this mode, the ballast execution subsystem does not use a single liquid level target as the control basis, but achieves overall load stability through the coordinated adjustment of multiple water tanks.

[0075] During the experiment, when the model ship was disturbed by external forces causing a change in the liquid level of one of the tanks, the sensing and acquisition subsystem detected the changes in liquid level and flow rate in real time. The remote control subsystem adjusted the pumping speed of other tanks according to the deviation, so that the overall load center of gravity was restored to the target state. This embodiment verifies the system's ability to dynamically maintain the load center of gravity under non-static conditions through continuous variable speed adjustment.

[0076] Example 5: Ballast Experiment under Remote Control Conditions

[0077] In this embodiment, the ballast execution subsystem and the sensing and acquisition subsystem are located inside the ship model, while the remote control subsystem is located outside the hull. During the experiment, the remote control subsystem sends control commands to the ballast execution subsystem via communication, and simultaneously receives liquid level and flow information from the sensing and acquisition subsystem. The system completes the entire control process of the ballast experiment remotely.

[0078] During ballast loading, the remote control subsystem makes judgments and decisions based on real-time received data and continuously outputs constantly changing adjustment commands to achieve remote closed-loop control of the ballast speed. Experimental results show that even under remote control conditions, the system can maintain stable data interaction and adjustment effects, thus supporting the claims related to remote collaborative control.

[0079] Example 6: Comprehensive Experiment and Data Processing

[0080] In this embodiment, the system simultaneously records and processes experimental data while completing the ballast experiment. Liquid level and flow information collected by the sensing and acquisition subsystem are transmitted in real-time to the remote control subsystem during the experiment. The remote control subsystem parses and stores the data to form a complete experimental data record.

[0081] After the experiment, the remote control subsystem processes and analyzes the recorded data to evaluate ballast speed changes, liquid level response characteristics, and system stability. By comparing and analyzing data from different experimental modes, the system's experimental performance in continuous variable speed regulation, closed-loop control, and multi-tank coordination can be verified. This embodiment demonstrates that the system can not only complete ballast regulation experiments but also provide data support for experimental result analysis, thus supporting the overall technical effects of the claims.

[0082] It should be noted that embodiments of the present invention can be implemented using hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated-design hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a carrier medium such as a disk, CD, or DVD-ROM, a programmable memory such as read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented using hardware circuitry such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field-programmable gate arrays, programmable logic devices, etc., or using software executed by various types of processors, or using a combination of the above-described hardware circuitry and software, such as firmware.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A marine ballast continuously variable speed adjustment experimental system, characterized in that, The system includes a ballast execution subsystem, a sensor acquisition subsystem, and a remote control subsystem; in, The ballast execution subsystem is used to perform water filling or drainage operations on multiple ballast water tanks, and can achieve continuous adjustment of the filling and drainage speed during operation; The sensing and acquisition subsystem is used to acquire liquid level and flow information related to ballast status in real time. The remote control subsystem is used to generate control commands based on the target load condition and to dynamically adjust the ballast execution subsystem according to the liquid level information and flow rate information. The ballast execution subsystem, the sensing and acquisition subsystem, and the remote control subsystem form a closed-loop collaborative relationship to achieve continuous adjustment and stable maintenance of the ship model's load status.

2. The marine ballast continuously variable speed adjustment experimental system as described in claim 1, characterized in that, The ballast execution subsystem includes multiple independently configured ballast water tanks, each capable of water intake or drainage, and coordinated control enables the overall load distribution of the ship model to be adjusted in a coordinated manner.

3. The marine ballast continuously variable speed adjustment experimental system as described in claim 1, characterized in that, The ballast execution subsystem can continuously adjust the pumping speed according to control commands during operation, rather than switching between preset discrete speed levels.

4. A continuously variable speed control system for marine ballast testing, employing the marine ballast continuously variable speed control experimental system as described in any one of claims 1 to 3, characterized in that, The control system includes: The target load setting unit is used to set the target load state of the ship model; The status sensing unit is used to acquire liquid level and flow information in real time during the ballast process; The control decision unit is used to compare the liquid level information and flow rate information with the target loading condition and generate continuously changing adjustment commands. An execution control unit is used to adjust the ballast water discharge speed in real time according to the adjustment command; The control decision unit and the execution control unit form a closed-loop regulation relationship to achieve a smooth transition or stable maintenance of the load condition during the ballast process.

5. The continuously variable speed control system as described in claim 4, characterized in that, The target load condition setting unit supports at least a fixed load condition adjustment mode, a continuous switching mode between two load conditions, and a load center of gravity holding mode.

6. The continuously variable speed control system as described in claim 4, characterized in that, The control decision unit and the execution control unit interact with each other via remote communication, enabling the control system to monitor and adjust the ballast process in real time from outside the hull.

7. A method for experimental adjustment of continuously variable speed marine ballast based on the system described in any one of claims 1 to 6, characterized in that, The method includes: Set the target loading conditions for the ship model; Real-time acquisition of liquid level and flow rate information related to the ballast state during ballasting process; The collected liquid level and flow rate information are compared with the target load conditions to generate continuously changing adjustment commands; The ballast water discharge speed is dynamically adjusted according to the adjustment command. Maintain or terminate ballast operations once the target load condition is reached.

8. The experimental method for continuous variable speed adjustment of marine ballast as described in claim 7, characterized in that, The target loading condition is a predetermined fixed loading condition, and the ballast process automatically stops after reaching the corresponding liquid level.

9. The experimental method for continuous variable speed adjustment of marine ballast as described in claim 7, characterized in that, The target load condition includes a continuous transformation process from an empty state to a fully loaded state or from a fully loaded state to an empty state, and the ballast speed is continuously adjusted according to the real-time status during the transformation process.

10. The experimental method for continuous variable speed adjustment of marine ballast as described in claim 7, characterized in that, Under load disturbance conditions, the dynamic maintenance of the ship model's load center of gravity is achieved by continuously comparing the real-time collected liquid level and flow information with the target load conditions.

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