A force-adaptive variable-section truss conversion component

Abstract

The present invention discloses a force-adaptive variable-section truss conversion component, which includes three main parts: a variable-section body, an intelligent sensing system, and an adaptive adjustment mechanism; the variable-section body is made of high-strength steel, adopts a hollow design, and the cross-section can be changed between rectangular, circular, and elliptical; the intelligent sensing system includes a strain sensor, a displacement sensor, and a data processing unit, which are used to monitor the stress condition of the component in real time; the adaptive adjustment mechanism is composed of an electric hydraulic cylinder and a control system, which can adjust the cross-sectional shape and size of the component according to the sensing data. The various parts of the present invention are interconnected by high-precision ball joints and retractable connectors to form an integral structure; it has the characteristics of strong adaptive ability, high material utilization, safety and reliability, and is suitable for buildings and bridge projects under various complex stress environments.

Description

Technical Field

[0001] The invention relates to a force-adaptive variable-section truss conversion component, belonging to the technical field of civil engineering structure design and intelligent building technology. Background Art

[0002] In modern construction and bridge engineering, truss structures are widely used due to their advantages such as light weight, high strength and large span. However, traditional truss structures usually adopt fixed-section designs, which are difficult to adapt to complex and changing load conditions, often leading to material waste or insufficient load-bearing capacity. In addition, in extreme weather or earthquakes, fixed-section truss structures are difficult to adjust quickly to adapt to sudden load changes, posing safety risks.

[0003] At present, some variable cross-section truss structures have been proposed, but most designs still have the following problems: first, the cross-section variation range is limited, which makes it difficult to meet the needs under extreme conditions; second, the adjustment mechanism is complex and the reaction speed is slow, which makes it difficult to respond to sudden load changes in time; third, there is a lack of intelligent monitoring and adaptive adjustment capabilities, which requires manual intervention, is inefficient and has the risk of misoperation. Therefore, the development of an intelligent truss conversion component that can automatically adjust the cross-section according to the real-time stress condition has important engineering application value. Summary of the invention

[0004] The purpose of the present invention is to provide a force-adaptive variable-section truss conversion component, aiming to overcome the defects existing in the prior art, realize the intelligent, lightweight and high-efficiency adjustment of the truss structure, improve the safety and adaptability of the structure, and reduce material consumption and construction costs.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A force-adaptive variable-section truss conversion component, comprising a variable-section body, an intelligent sensing system and an adaptive adjustment mechanism, characterized in that: the variable-section body is made of high-strength steel, adopts a hollow design, and the cross-section can be changed between rectangular, circular and elliptical; the intelligent sensing system comprises a strain sensor, a displacement sensor and a data processing unit for real-time monitoring of the stress condition of the component; the adaptive adjustment mechanism is composed of an electric hydraulic cylinder and a control system, and can adjust the cross-sectional shape and size of the component according to the sensing data; the variable-section body, the intelligent sensing system and the adaptive adjustment mechanism are interconnected by a high-precision ball joint and a retractable connector to form an integral structure; when the external load changes, the intelligent sensing system captures stress and deformation information, the data processing unit analyzes the optimal cross-sectional form, and the adaptive adjustment mechanism immediately changes the geometric parameters of the component to keep it in the optimal stress state at all times; the maximum bearing capacity of the component is 80kN, and the adjustable range of the cross-sectional area is 50-200cm2 , the response time is less than 0.5s.

[0007] Furthermore, the specific structure of the variable-section body includes: an outer shell, an internal movable plate and a driving device; the outer shell is made of Q345 steel, with a wall thickness of 10 mm and a length of 3000 mm; the internal movable plate is composed of 4 mutually perpendicular steel plates, each of which is 8 mm thick and has the same length as the outer shell; the driving device includes 4 groups of electric push rods, each group of electric push rods is installed at the four corners of the outer shell and connected to the corresponding internal movable plates; the internal movable plates are connected to each other through high-strength hinges, and the rotation angle range of the hinges is 0°-180°; the maximum thrust of the electric push rods The force is 20kN, the stroke is 100mm, and it works in coordination with the adaptive adjustment mechanism through the control system; when the cross-sectional shape needs to be changed, the control system controls the electric push rod to push or pull the internal movable plate according to the analysis results of the data processing unit, so that it changes between a rectangle (200mm×100mm), a circle (diameter 160mm) and an ellipse (major axis 200mm, minor axis 100mm); flanges are provided at both ends of the variable-section body for connection with other components, the diameter of the flange is 250mm, the thickness is 20mm, and it is fixed with 8 M20 high-strength bolts.

[0008] Furthermore, the specific structure of the intelligent sensing system includes: a strain sensor, a displacement sensor, a data processing unit and a signal transmission module; the strain sensor is a resistance strain gauge with a sensitivity of 2.0±1% and a measuring range of ±3%, with a total of 8 gauges, which are evenly arranged along the length direction of the variable-section main body shell and pasted at a 45° angle to the shell surface for measuring axial strain and shear strain; the displacement sensor is a linear variable differential transformer (LVDT) type with a measuring range of ±50mm and an accuracy of 0.1% FS, with a total of 4 gauges, which are respectively installed at the four corners of the variable-section main body for monitoring section deformation; the data processing unit adopts a 32-bit ARMCortex-M4 processor with a main frequency of 168MHz, built-in 512KB flash memory and 128KBRAM, and can process sensor data in real time and perform finite element analysis; the signal transmission module adopts an industrial-grade wireless sensor The transmission technology has a transmission frequency of 2.4GHz and a transmission distance of not less than 100m, which is used to transmit the processed data to the control system of the adaptive adjustment mechanism; the strain sensor and the displacement sensor are connected to the data processing unit through a shielded cable, and the cable length does not exceed 1m to reduce signal interference; the data processing unit is packaged in a waterproof and dustproof shell with a size of 100mm×80mm×30mm, installed in the middle of the variable-section body, and fixed by 4 M6 shock-proof bolts; the sampling frequency of the intelligent sensing system is 100Hz, and the data update rate is 10Hz, ensuring that the dynamic stress condition of the component can be captured in time; when the detected strain value exceeds the preset threshold (the axial strain threshold is ±0.1%, and the shear strain threshold is ±0.05%) or the displacement value exceeds the preset threshold (±10mm), the data processing unit immediately triggers the adaptive adjustment mechanism to adjust the section.

[0009] Furthermore, the specific structure of the adaptive adjustment mechanism includes: an electric hydraulic cylinder, a control system, a hydraulic pump station and a hydraulic pipeline; the electric hydraulic cylinder adopts a double-acting cylinder design, with a cylinder diameter of 50mm, a maximum stroke of 100mm, and a maximum working pressure of 21MPa. There are 4 groups in total, which are respectively installed at the four corners of the variable-section body and fixedly connected to the internal movable plate. The connection adopts a ball joint to adapt to movements at different angles; the control system adopts an industrial-grade PLC with 16 digital inputs, 16 digital outputs, 8 analog inputs and 4 analog outputs, a main frequency of 200MHz, and a built-in 256MB storage space for receiving data from the intelligent sensor system and controlling the movement of the electric hydraulic cylinder; the hydraulic pump station includes a motor, a gear pump, a relief valve, a one-way valve and an oil tank. The motor power is 2.2kW, the pump displacement is 16ml / r, the maximum working pressure is 25MPa, and the oil tank capacity is 20L; the hydraulic pipeline adopts a high-pressure hose with a nominal pressure of 31.5MPa and an inner diameter of 10mm for connecting the hydraulic pump station and electric hydraulic cylinder; the control system communicates with the data processing unit of the intelligent sensing system through the RS485 interface, adopts the ModbusRTU protocol, and the communication rate is 115200bps; the control system is encapsulated in a waterproof and dustproof shell with a size of 200mm×150mm×80mm, installed on the outside of the variable-section body, and fixed by 4 M8 shock-proof bolts; the hydraulic pump station is installed at a distance of no more than 2m from the variable-section body and fixed by a vibration-damping base to reduce vibration and noise during operation; when receiving the adjustment instruction of the intelligent sensing system, the control system calculates the optimal cross-sectional shape according to the preset algorithm, and adjusts the shape of the variable-section body by controlling the extension and contraction of the electric hydraulic cylinder; the response time of the adaptive adjustment mechanism is less than 0.3s, the adjustment accuracy is ±0.1mm, and continuous or segmented adjustment can be achieved to meet the needs under different working conditions; the control system also has a self-diagnosis function, which can monitor the pressure, temperature and oil level of the hydraulic system in real time, and automatically alarm and take protective measures when abnormalities occur.

[0010] Furthermore, the connection and working mode of the variable-section body, the intelligent sensing system and the adaptive adjustment mechanism include: a high-precision ball joint, a retractable connector, a data fusion module and an optimization algorithm module; the high-precision ball joint is made of GCr15 bearing steel, with a nominal diameter of 40mm, a static load-bearing capacity of 100kN, an angle adjustment range of ±30°, and a total of 8, which are respectively installed on the flanges at both ends of the variable-section body, for connecting adjacent components and allowing a certain angle of rotation; the retractable connector is made of carbon fiber composite material, with a minimum length of 500mm, a maximum elongation of 200mm, and a tensile strength of not less than 1000MPa, a total of 4, evenly distributed around the variable-section body, one end is fixed to the variable-section body, and the other end is connected to the adjacent component, for adapting to the length adjustment when the section changes; the data fusion module adopts the Kalman filtering algorithm, which is integrated in the data processing unit, and is used to comprehensively analyze the data from the strain sensor and the displacement sensor to improve the measurement accuracy and reliability; the optimization algorithm module is based on genetic algorithm and finite element analysis, built into the control system, and is used for fast calculation Optimal cross-sectional form; when the external load changes, the specific workflow is as follows: a) the strain sensor and displacement sensor in the intelligent sensing system collect stress and deformation data of the component in real time; b) the data processing unit processes and analyzes the collected data through the data fusion module to generate a current stress state report; c) the control system receives the stress state report and calculates the optimal cross-sectional form through the optimization algorithm module; d) the electric hydraulic cylinder of the adaptive adjustment mechanism adjusts the geometric parameters of the variable cross-sectional body according to the calculation results; e) the retractable connector automatically adjusts the length as the cross-sectional changes to ensure the overall stability of the component; f) the high-precision ball joint allows the component to rotate slightly during the adjustment process to reduce internal stress; the total response time of the workflow does not exceed 0.5s, of which the data collection and fusion time does not exceed 0.1s, the optimization calculation time does not exceed 0.2s, and the cross-sectional adjustment time does not exceed 0.2s; the component can maintain the optimal stress state under the combined action of axial force of 0-80kN and bending moment of 0-10kN·m, and the adjustment range of the cross-sectional inertia moment is 1×10^5mm^4 to 5×10^5mm^4.

[0011] Furthermore, the maximum load-bearing capacity, cross-sectional area adjustment range and response time of the component are achieved by: high-strength material selection, precision drive system, fast response controller and safety monitoring module; the high-strength material is Q690 high-strength steel with a yield strength of not less than 690MPa, a tensile strength of not less than 770MPa and an elongation of not less than 14%, which is used to make the outer shell and internal movable plate of the variable-section body to ensure a maximum load-bearing capacity of 80kN; the precision drive system includes: a) 4 sets of servo motors with a rated power of 2kW and a maximum speed of 3000rpm, which are used to drive the hydraulic pump; b) a high-precision proportional valve with a response frequency of not less than 100Hz and a control accuracy of ±0.1%, which is used to accurately control the movement of the hydraulic cylinder; c) a position feedback sensor with a resolution of 0.01mm, which is used to monitor the position of the internal movable plate in real time;

[0012] The fast response controller uses an FPGA chip with a clock frequency of 200MHz and parallel processing capability to achieve an overall response time of less than 0.5s, including: a) a data acquisition module with a sampling rate of 10kHz and a time of no more than 0.1s; b) a data processing module with a pipeline architecture and a time of no more than 0.2s; c) an execution control module with a feedforward-feedback composite control strategy and a time of no more than 0.2s;

[0013] The safety monitoring module includes: a) an overload protection device, which triggers the protection mechanism within 0.01s when the load exceeds 80kN; b) a deformation monitoring system, which monitors the axial deformation and lateral deformation of the component in real time with an accuracy of 0.1mm; c) a fatigue life assessment unit, which assesses the cumulative fatigue damage of the component in real time based on the rain flow counting method;

[0014] The cross-sectional area can be adjusted in the range of 50-200 cm 2 ,The specific implementation methods are as follows: a) Minimum cross-section state: rectangular cross-section, size is 70.71mm×70.71mm, area is about 50cm 2 ; b) Maximum cross-section state: circular cross-section, diameter 159.57mm, area about 200cm 2 ; c) Intermediate state: elliptical cross section, the ratio of major axis to minor axis can be continuously adjusted between 1:1 and 2:1;

[0015] The specific distribution of the response time less than 0.5s is as follows: a) intelligent sensor system data acquisition and preliminary processing: ≤0.1s; b) data processing unit analysis and decision-making: ≤0.2s; c) adaptive adjustment mechanism execution adjustment: ≤0.2s;

[0016] The safety factor of the component under the maximum load-bearing state is not less than 1.5, and the design life under fatigue load is not less than 10^6 cycles.

[0017] The beneficial effects of the present invention are as follows: the intelligent and adaptive adjustment of truss conversion components is realized, which greatly improves the adaptability and safety of the structure; the use of high-strength and lightweight materials, such as Q690 high-strength steel and carbon fiber composite materials, reduces the dead weight of the components and facilitates installation and adjustment; the innovative variable cross-section design and precision drive system enable the components to quickly respond to load changes within 0.5s, greatly improving the dynamic performance of the structure; the integration of intelligent monitoring and self-diagnosis functions realizes all-round and real-time safety monitoring and improves the reliability of the structure; the optimized material utilization and variable cross-section design significantly reduce material consumption and have good economy and environmental protection; the modular design facilitates transportation, installation and maintenance, improves construction efficiency and reduces construction costs; the system's adaptive ability enables it to cope with various complex and extreme load conditions, expanding the application range of the truss structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the force-adaptive variable-section truss conversion component of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a variable cross-section body;

[0020] Figure 3 It is a schematic diagram of the layout of the intelligent sensor system;

[0021] Figure 4 is a structural schematic diagram of an adaptive adjustment mechanism;

[0022] Figure 5 This is a cross-sectional view of a high-precision ball joint;

[0023] Figure 6 is a schematic diagram of the structure of a retractable connector;

[0024] Figure 7 is a block diagram of a data processing unit;

[0025] Figure 8 is the block diagram of the control system;

[0026] Fig. 9 It is a schematic diagram of the component in different cross-sectional states;

[0027] Fig.10 Schematic diagram of force analysis of components. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1As shown, the force-bearing adaptive variable-section truss conversion member provided by the present invention comprises a variable-section body 1, an intelligent sensing system 2 and an adaptive adjustment mechanism 3. These three main parts are interconnected by a high-precision ball joint 4 and a telescopic connector 5 to form a complete intelligent structural system.

[0030] like Figure 2 As shown, the variable cross-section body 1 adopts a hollow design and consists of an outer shell 11, an internal movable plate 12 and a drive device 13. The outer shell 11 is made of Q345 steel, with a wall thickness of 10mm and a length of 3000mm, providing basic structural strength. The internal movable plate 12 is composed of 4 mutually perpendicular steel plates, each with a thickness of 8mm, which are connected to each other by high-strength hinges 14. The drive device 13 includes 4 sets of electric push rods 131, which are installed at the four corners of the outer shell 11 to push or pull the internal movable plate 12 to achieve the change of the cross-sectional shape.

[0031] like Figure 3 As shown, the intelligent sensing system 2 includes a strain sensor 21, a displacement sensor 22, a data processing unit 23 and a signal transmission module 24. Eight strain sensors 21 are evenly arranged along the length direction of the shell of the variable cross-section body 1, and are pasted at an angle of 45° to the surface to measure axial strain and shear strain. Four displacement sensors 22 are installed at the four corners of the variable cross-section body 1 to monitor cross-sectional deformation. The data processing unit 23 uses a 32-bit ARM Cortex-M4 processor, which can process sensor data in real time and perform finite element analysis.

[0032] like Figure 4 As shown, the adaptive adjustment mechanism 3 is composed of an electric hydraulic cylinder 31, a control system 32, a hydraulic pump station 33 and a hydraulic pipeline 34. Four groups of double-acting electric hydraulic cylinders 31 are installed at the four corners of the variable-section body 1 and are fixedly connected to the internal movable plate 12. The control system 32 adopts an industrial-grade PLC to receive data from the intelligent sensor system 2 and control the movement of the electric hydraulic cylinder 31. The hydraulic pump station 33 provides a power source and is connected to the electric hydraulic cylinder 31 through a hydraulic pipeline 34.

[0033] like Figure 5 As shown, the high-precision ball joint 4 is made of GCr15 bearing steel, with a nominal diameter of 40 mm, a static load capacity of 100 kN, and an angle adjustment range of ±30°. The eight ball joints are respectively installed on the flanges 15 at both ends of the variable-section body 1, which are used to connect adjacent components and allow a certain angle of rotation, effectively reducing internal stress.

[0034] like Figure 6As shown, the retractable connector 5 is made of carbon fiber composite material, with a minimum length of 500 mm, a maximum elongation of 200 mm, and a tensile strength of not less than 1000 MPa. The four retractable connectors are evenly distributed around the variable cross-section body 1, one end of which is fixed to the variable cross-section body 1 and the other end is connected to the adjacent component, so as to adapt to the length adjustment when the cross-section changes.

[0035] like Figure 7 As shown, the data processing unit 23 has a built-in data fusion module 6, which uses a Kalman filtering algorithm to comprehensively analyze the data from the strain sensor 21 and the displacement sensor 22 to improve the measurement accuracy and reliability.

[0036] like Figure 8 As shown, the control system 32 has a built-in optimization algorithm module 7, which is used to quickly calculate the optimal cross-sectional form based on genetic algorithm and finite element analysis. When receiving the adjustment instruction from the intelligent sensor system 2, the control system 32 can complete the calculation and issue the adjustment instruction within 0.2s.

[0037] like Fig. 9 As shown, the cross-section of the component can be continuously changed between a rectangle of 200mm×100mm, a circle with a diameter of 160mm, and an ellipse with a major axis of 200mm and a minor axis of 100mm. The minimum cross-sectional area is about 50cm 2 , the maximum cross-sectional area is about 200cm 2 , to meet the force requirements under different working conditions.

[0038] like Fig.10 As shown in the figure, the component can maintain the optimal stress state under the combined action of 0-80kN axial force and 0-10kN·m bending moment. By adjusting the cross-sectional shape and size in real time, the component always maintains the optimal stress state, greatly improving the safety and efficiency of the structure.

[0039] The force-adaptive variable-section truss conversion component of the present invention realizes the intelligent and efficient adjustment of the truss structure through innovative structural design and advanced control strategy. The system has the characteristics of high strength, light weight, rapid response, intelligent monitoring, etc., which not only improves the safety and adaptability of the structure, but also reduces material consumption and construction costs. The application of this component will bring significant technological progress and economic benefits to the fields of civil engineering and intelligent buildings.

Claims

1. A force-bearing adaptive variable-section truss conversion member, comprising a variable-section body (1), an intelligent sensing system (2) and an adaptive adjustment mechanism (3), characterized in that: The variable cross-section body (1) is made of high-strength steel and adopts a hollow design, and the cross-section can be changed between rectangular, circular and elliptical; The intelligent sensing system (2) comprises a strain sensor (21), a displacement sensor (22) and a data processing unit (23), and is used to monitor the stress condition of the component in real time; The adaptive adjustment mechanism (3) is composed of an electric hydraulic cylinder (31) and a control system (32), and can adjust the cross-sectional shape and size of the component according to the sensor data; The variable-section body (1), the intelligent sensing system (2) and the adaptive adjustment mechanism (3) are interconnected via a high-precision ball joint (4) and a retractable connector (5) to form an integral structure; when the external load changes, the intelligent sensing system (2) captures stress and deformation information, the data processing unit (23) analyzes the optimal section form, and the adaptive adjustment mechanism (3) then changes the geometric parameters of the component to keep it in the optimal stress state at all times; The maximum load-bearing capacity of the component is 80kN, and the cross-sectional area can be adjusted in the range of 50-200cm 2 , the response time is less than 0.5s.

2. The force-adaptive variable-section truss conversion component according to claim 1, characterized in that: The specific structure of the variable cross-section body (1) includes: an outer shell (11), an internal movable plate (12) and a driving device (13); the outer shell (11) is made of Q345 steel, with a wall thickness of 10 mm and a length of 3000 mm; the internal movable plate (12) is composed of four mutually perpendicular steel plates, each of which is 8 mm thick and has the same length as the outer shell (11); the driving device (13) includes four groups of electric push rods (131), each group of electric push rods (131) is installed at four corners of the outer shell (11) and connected to the corresponding internal movable plate (12); the internal movable plates (12) are connected to each other through high-strength hinges (14), and the rotation angle range of the hinges (14) is 0°-180°; The maximum thrust of the movable push rod (131) is 20 kN, and the stroke is 100 mm. The movable push rod (131) works in coordination with the adaptive adjustment mechanism (3) through the control system (32). When the cross-sectional shape needs to be changed, the control system (32) controls the electric push rod (131) to push or pull the internal movable plate (12) according to the analysis result of the data processing unit (23), so that the movable plate (12) changes between a rectangle (200 mm×100 mm), a circle (diameter 160 mm) and an ellipse (long axis 200 mm, short axis 100 mm). Both ends of the variable cross-sectional body (1) are provided with flanges (15) for connection with other components. The diameter of the flange (15) is 250 mm, the thickness is 20 mm, and it is fixed with 8 M20 high-strength bolts.

3. The force-adaptive variable-section truss conversion component according to claim 1, characterized in that: The specific structure of the intelligent sensing system (2) includes: A strain sensor (21), a displacement sensor (22), a data processing unit (23) and a signal transmission module (24); the strain sensor (21) is a resistance strain gauge with a sensitivity of 2.0±1% and a measurement range of ±3%. There are 8 of them in total, which are evenly arranged along the length direction of the outer shell of the variable-section body (1) and attached to the outer shell surface at an angle of 45°, and are used to measure axial strain and shear strain; The displacement sensor (22) is a linear variable differential transformer (LVDT) type, with a measurement range of ±50 mm and an accuracy of 0.1% FS. There are four displacement sensors in total, which are respectively installed at the four corners of the variable cross-section body (1) to monitor cross-section deformation. The data processing unit (23) uses a 32-bit ARM Cortex-M4 processor with a main frequency of 168 MHz, a built-in 512 KB flash memory and a 128 KB RAM, and is capable of processing sensor data in real time and performing finite element analysis; the signal transmission module (24) uses industrial-grade wireless transmission technology with a transmission frequency of 2.4 GHz and a transmission distance of not less than 100 m, and is used to transmit processed data to a control system (32) of the adaptive adjustment mechanism (3); The strain sensor (21) and the displacement sensor (22) are connected to the data processing unit (23) via a shielded cable, and the cable length does not exceed 1 m to reduce signal interference; The data processing unit (23) is packaged in a waterproof and dustproof housing with a size of 100 mm×80 mm×30 mm, and is installed in the middle of the variable-section body (1) and fixed by four M6 anti-vibration bolts; The sampling frequency of the intelligent sensing system (2) is 100 Hz, and the data update rate is 10 Hz, so as to ensure that the dynamic stress condition of the component can be captured in time; When the detected strain value exceeds a preset threshold value (the axial strain threshold value is ±0.1%, and the shear strain threshold value is ±0.05%) or the displacement value exceeds a preset threshold value (±10 mm), the data processing unit (23) immediately triggers the adaptive adjustment mechanism (3) to perform cross-section adjustment.

4. The force-adaptive variable-section truss conversion component according to claim 1, characterized in that: The specific structure of the adaptive adjustment mechanism (3) includes: An electric hydraulic cylinder (31), a control system (32), a hydraulic pump station (33) and a hydraulic pipeline (34); The electric hydraulic cylinder (31) adopts a double-acting cylinder design, with a cylinder diameter of 50 mm, a maximum stroke of 100 mm, and a maximum working pressure of 21 MPa. There are 4 groups in total, which are respectively installed at the four corners of the variable-section body (1) and fixedly connected to the internal movable plate (12). The connection adopts a ball joint to adapt to movement at different angles. The control system (32) adopts an industrial-grade PLC, with 16 digital inputs, 16 digital outputs, 8 analog inputs and 4 analog outputs, a main frequency of 200 MHz, and a built-in 256 MB storage space, which is used to receive data from the intelligent sensor system (2) and control the movement of the electric hydraulic cylinder (31); The hydraulic pump station (33) includes a motor, a gear pump, a relief valve, a check valve and an oil tank. The motor power is 2.2 kW, the pump displacement is 16 ml / r, the maximum working pressure is 25 MPa, and the oil tank capacity is 20 L. The hydraulic pipeline (34) is a high-pressure hose with a nominal pressure of 31.5 MPa and an inner diameter of 10 mm, and is used to connect the hydraulic pump station (33) and the electric hydraulic cylinder (31); The control system (32) communicates with the data processing unit (23) of the intelligent sensor system (2) via an RS485 interface, using the Modbus RTU protocol, with a communication rate of 115200 bps; The control system (32) is encapsulated in a waterproof and dustproof housing with a size of 200 mm×150 mm×80 mm, installed on the outside of the variable-section body (1), and fixed by four M8 anti-vibration bolts; The hydraulic pump station (33) is installed at a position no more than 2 m away from the variable cross-section body (1) and is fixed by a vibration-damping base to reduce vibration and noise during operation; When receiving an adjustment instruction from the intelligent sensing system (2), the control system (32) calculates the optimal cross-sectional shape according to a preset algorithm, and adjusts the shape of the variable cross-sectional body (1) by controlling the extension and contraction of the electric hydraulic cylinder (31); The response time of the adaptive adjustment mechanism (3) is less than 0.3s, the adjustment accuracy is ±0.1mm, and continuous or segmented adjustment can be achieved to meet the needs under different working conditions; The control system (32) also has a self-diagnosis function, and can monitor the pressure, temperature and oil level of the hydraulic system in real time, and automatically alarm and take protective measures when an abnormality occurs.

5. The force-adaptive variable-section truss conversion component according to claim 1, characterized in that: The connection and working method of the variable cross-section body (1), the intelligent sensing system (2) and the adaptive adjustment mechanism (3) include: A high-precision ball joint (4), a telescopic connection part (5), a data fusion module (6) and an optimization algorithm module (7); The high-precision ball joint (4) is made of GCr15 bearing steel, has a nominal diameter of 40 mm, a static load capacity of 100 kN, an angle adjustment range of ±30°, and is 8 in total. They are respectively mounted on the flanges (15) at both ends of the variable-section body (1) to connect adjacent components and allow rotation at a certain angle. The retractable connector (5) is made of carbon fiber composite material, has a minimum length of 500 mm, a maximum elongation of 200 mm, a tensile strength of not less than 1000 MPa, and has a total of 4 pieces, which are evenly distributed around the variable cross-section body (1), one end of which is fixed to the variable cross-section body (1) and the other end is connected to an adjacent component, so as to adjust the length to adapt to changes in the cross-section; The data fusion module (6) adopts a Kalman filtering algorithm and is integrated in the data processing unit (23) for comprehensively analyzing the data from the strain sensor (21) and the displacement sensor (22) to improve the measurement accuracy and reliability; The optimization algorithm module (7) is based on genetic algorithm and finite element analysis, is built into the control system (32), and is used to quickly calculate the optimal cross-sectional form; When the external load changes, the specific working process is as follows: a) the strain sensor (21) and displacement sensor (22) in the intelligent sensing system (2) collect stress and deformation data of the component in real time; b) the data processing unit (23) processes and analyzes the collected data through the data fusion module (6) to generate a current stress state report; c) the control system (32) receives the stress state report and calculates the optimal cross-sectional form through the optimization algorithm module (7); d) the electric hydraulic cylinder (31) of the adaptive adjustment mechanism (3) adjusts the geometric parameters of the variable cross-sectional body (1) according to the calculation results; e) the telescopic connector (5) automatically adjusts the length as the cross-sectional changes to ensure the overall stability of the component; f) the high-precision ball joint (4) allows the component to rotate slightly during the adjustment process to reduce internal stress; The total response time of the workflow does not exceed 0.5s, of which the data acquisition and fusion time does not exceed 0.1s, the optimization calculation time does not exceed 0.2s, and the section adjustment time does not exceed 0.2s; The component can maintain an optimal stress state under the combined action of an axial force of 0-80 kN and a bending moment of 0-10 kN·m, and the adjustment range of the section inertia moment is 1×10^5mm^4 to 5×10^5mm^4.

6. The force-adaptive variable-section truss conversion component according to claim 1, characterized in that: The maximum load-bearing capacity, cross-sectional area adjustment range and response time of the component are achieved by: Selection of high-strength materials (8), precision drive system (9), fast response controller (10) and safety monitoring module (11); The high-strength material (8) is Q690 high-strength steel, with a yield strength of not less than 690 MPa, a tensile strength of not less than 770 MPa, and an elongation of not less than 14%, and is used to make the outer shell (11) and the internal movable plate (12) of the variable-section body (1), ensuring a maximum load-bearing capacity of 80 kN; The precision drive system (9) comprises: a) 4 sets of servo motors (91) with a rated power of 2 kW and a maximum speed of 3000 rpm, used to drive the hydraulic pump; b) a high-precision proportional valve (92) with a response frequency of not less than 100 Hz and a control accuracy of ±0.1%, used to accurately control the movement of the hydraulic cylinder; c) a position feedback sensor (93) with a resolution of 0.01 mm, used to monitor the position of the internal movable plate (12) in real time; The fast response controller (10) adopts an FPGA chip with a clock frequency of 200 MHz and has parallel processing capability, and is used to achieve an overall response time of less than 0.5 s, and includes: a) a data acquisition module (101) with a sampling rate of 10 kHz and a time of no more than 0.1 s; b) a data processing module (102) adopting a pipeline architecture and a time of no more than 0.2 s; c) an execution control module (103) adopting a feedforward-feedback composite control strategy and a time of no more than 0.2 s; The safety monitoring module (11) comprises: a) an overload protection device (111), which triggers a protection mechanism within 0.01s when a load exceeding 80kN is detected; b) a deformation monitoring system (112), which monitors the axial deformation and lateral deformation of the component in real time with an accuracy of 0.1mm; c) a fatigue life assessment unit (113), which assesses the accumulated fatigue damage of the component in real time based on a rain flow counting method; The cross-sectional area can be adjusted in the range of 50-200 cm 2 The specific implementation methods are as follows: a) Minimum cross-section state: rectangular cross-section, size 70.71mm×70.71mm, area about 50cm 2 ; b) Maximum cross-section state: circular cross-section, diameter 159.57mm, area about 200cm 2 ; c) Intermediate state: elliptical cross section, the ratio of major axis to minor axis can be continuously adjusted between 1:1 and 2:1; The specific distribution of the response time less than 0.5s is as follows: a) intelligent sensor system (2) data collection and preliminary processing: ≤0.1s; b) data processing unit (23) analysis and decision-making: ≤0.2s; c) adaptive adjustment mechanism (3) execution adjustment: ≤0.2s; The safety factor of the component under the maximum load-bearing state is not less than 1.5, and the design life under fatigue load is not less than 10^6 cycles.

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