Satellite truss structure antenna integrated with load and sensing

Abstract

The application belongs to the field of aerospace technology, and provides a satellite truss structure antenna integrated with bearing and sensing, which comprises satellite truss structure cells, each of which comprises a bearing and sensing truss member, and the bearing and sensing truss member is integrated with a bionic micro-vibration sensing unit and a bionic strain sensing unit for measuring and monitoring the static bending and dynamic micro-vibration of the bearing and sensing truss member; a master control chip unit for processing signals collected by the bionic micro-vibration sensing unit and the bionic strain sensing unit; a wireless data transmission unit for sending the collected signals processed by the master control chip unit to an upper computer; a self-powered unit; and a flexible circuit unit for integration and electrical connection. The application realizes real-time monitoring of the micro-vibration and strain of a single member or the whole truss antenna while playing the bearing function by designing the bearing and sensing truss member, and improves the light weight of the satellite antenna while integrating power supply.

Description

Technical Field

[0001] This invention belongs to the field of aerospace technology, and in particular relates to a satellite truss structure antenna that integrates load-bearing and sensing functions. Background Technology

[0002] As a key structural component of a satellite, the micro-vibration and strain characteristics of the satellite truss antenna directly affect the satellite's payload performance and mission success rate. Micro-vibration refers to the jitter response of the spacecraft during its on-orbit operation, induced by factors such as on-board rotating components, large controllable component drive mechanisms, thruster ignition during orbit changes and attitude adjustments, and the alternating cold and heat of large flexible structures entering and leaving shadows. Conducting micro-vibration and strain tests on the satellite truss antenna can provide key data support for optimizing the structural design of the satellite platform, formulating vibration control strategies, and evaluating on-orbit performance, which is of great significance for improving the overall performance and reliability of the satellite.

[0003] The micro-vibrations and strains of satellite truss antennas directly affect the satellite's payload performance. For example, for high-precision remote sensing satellites, micro-vibrations can cause severe oscillations in the satellite's attitude angle, reducing the detection accuracy of onboard remote sensing equipment and even leading to mission failure. The accumulation of strain can cause deformation of the satellite truss antenna, affecting the antenna's pointing accuracy and signal transmission quality. In addition, after a spacecraft successfully enters orbit after launch, it will experience cyclical changes in high and low temperature environments. The periodic changes in ambient temperature will cause deformation of the spacecraft's high-precision, high-stability structures and precision components. Typically, these deformations range from a few micrometers to a few millimeters. This requires flexible strain sensors to have high sensitivity and be able to detect minute deformations in the spacecraft's structure and critical components, thereby affecting the spacecraft's pointing accuracy and the operational accuracy of critical components.

[0004] Traditional structural testing methods mainly focus on macroscopic mechanical properties. For dynamic responses at small scales such as micro-vibrations and strain, their testing accuracy and sensitivity are often insufficient. In addition, the complex structure of satellite truss antennas and the on-orbit operating environment place higher demands on measurement and design technologies. Existing methods have certain limitations in terms of adaptability and reliability. Summary of the Invention

[0005] The purpose of this invention is to provide a satellite truss structure antenna that integrates load-bearing and sensing, thereby addressing the problems mentioned in the background art.

[0006] This invention is implemented as follows: a satellite truss structure antenna integrating load-bearing and sensing functions, comprising a plurality of satellite truss structure units, each satellite truss structure unit including load-bearing and sensing truss components, characterized in that the load-bearing and sensing truss components integrate:

[0007] Bionic micro-vibration sensing unit and bionic strain sensing unit are used to measure and monitor the static bending and dynamic micro-vibration of load-bearing and sensing truss components.

[0008] The main control chip unit is connected to the biomimetic micro-vibration sensing unit and the biomimetic strain sensing unit, and is used to process the signals collected by the biomimetic micro-vibration sensing unit and the biomimetic strain sensing unit.

[0009] The wireless data transmission unit is connected to the main control chip unit and is used to send the acquired signals processed by the main control chip unit to the host computer.

[0010] Self-powered unit, used for power supply;

[0011] The flexible circuit unit is connected to the biomimetic micro-vibration sensing unit, the biomimetic strain sensing unit, the self-powered unit, the main control chip unit, and the wireless data transmission unit for integration and electrical connection.

[0012] The present invention provides a satellite truss structure antenna that integrates load-bearing and sensing. By designing load-bearing and sensing truss components, it can perform the load-bearing function while realizing real-time monitoring of micro-vibration and strain of individual components or the truss antenna as a whole. It also improves the lightweight of the satellite antenna while integrating power supply.

[0013] By designing an integrated monitoring circuit based on self-powered, wireless data transmission, and flexible circuitry, a highly integrated and lightweight micro-vibration and strain monitoring system for truss components is further realized.

[0014] After integration of flexible circuit units, a thin sheet is formed, which is then folded and attached to the surface of the component, thus optimizing the space utilization of the satellite truss structure antenna.

[0015] The embodiments of the present invention can also be combined with a distributed network optimization layout to achieve the real-time monitoring requirements of high sensitivity and micro-vibration and strain. Attached Figure Description

[0016] Figure 1 A schematic diagram of a satellite truss structure antenna that integrates load-bearing and sensing functions, provided as an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of a satellite truss structure unit cell in a satellite truss structure antenna that integrates load-bearing and sensing, provided for an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the integrated load-bearing and sensing truss structure in a satellite truss structure antenna provided in an embodiment of the present invention.

[0019] Figure 4A schematic diagram of the structure of an integrated component in a satellite truss structure antenna that integrates load-bearing and sensing functions, provided for an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the structure of an integrated component in a satellite truss structure antenna that integrates load-bearing and sensing, provided for an embodiment of the present invention;

[0021] Figure 6 This is a front view of the integrated load-bearing and sensing truss components in a satellite truss structure antenna that integrates load-bearing and sensing, as provided in an embodiment of the present invention.

[0022] Figure 7 A schematic diagram of the structure of a biomimetic micro-vibration sensing unit or a biomimetic strain sensing unit in a satellite truss structure antenna that integrates load-bearing and sensing, provided for an embodiment of the present invention.

[0023] Figure 8 A schematic diagram of the stress deformation of a biomimetic micro-vibration sensing unit or a biomimetic strain sensing unit in a satellite truss structure antenna that integrates load-bearing and sensing, provided for an embodiment of the present invention.

[0024] Figure 9 A schematic diagram of the composition of a self-powered unit in a satellite truss structure antenna that integrates load carrying and sensing, provided for an embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram of the state of a satellite truss structure antenna that integrates load-bearing and sensing, provided as an embodiment of the present invention.

[0026] In the attached diagram: 1-Satellite truss structure unit cell; 11-Bearing and sensing truss component; 111-Bionic micro-vibration sensing unit; 112-Bionic strain sensing unit; 113-Self-powered unit; 114-Main control chip unit; 115-Flexible circuit unit; 116-Wireless data transmission unit; 1121-Strain gauge; 1122-Encapsulation layer; 1123-Parallel slots; 1131-Solar cell; 1132-Voltage conditioning circuit; 1133-Energy storage capacitor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0029] like Figures 1 to 6The diagram shown illustrates a structural design of a satellite truss antenna integrating load-bearing and sensing capabilities, according to an embodiment of the present invention. The antenna comprises several satellite truss unit cells 1, each including a load-bearing and sensing truss component 11. The characteristic feature is that the load-bearing and sensing truss component 11 integrates:

[0030] The biomimetic micro-vibration sensing unit 111 and the biomimetic strain sensing unit 112 are used to measure and monitor the static bending and dynamic micro-vibration of the load-bearing and sensing truss member 11.

[0031] The main control chip unit 114 is connected to the biomimetic micro-vibration sensing unit 111 and the biomimetic strain sensing unit 112, and is used to process the signals collected by the biomimetic micro-vibration sensing unit 111 and the biomimetic strain sensing unit 112.

[0032] The wireless data transmission unit 116 is connected to the main control chip unit 114 and is used to send the acquisition signal processed by the main control chip unit 114 to the host computer.

[0033] Self-powered unit 113, used for power supply;

[0034] The flexible circuit unit 115 is connected to the biomimetic micro-vibration sensing unit 111, the biomimetic strain sensing unit 112, the self-powered unit 113, the main control chip unit 114, and the wireless data transmission unit 116 for integration and electrical connection.

[0035] The integrated component consists of a biomimetic micro-vibration sensing unit 111, a biomimetic strain sensing unit 112, a self-powered unit 113, a main control chip unit 114, a flexible circuit unit 115, and a wireless data transmission unit 116.

[0036] In a preferred embodiment of the present invention, the biomimetic micro-vibration sensing unit 111 and the biomimetic strain sensing unit 112 convert analog signals into digital signals through an analog-to-digital converter (A / D) module and transmit them to the main control chip unit 114.

[0037] In one embodiment of the present invention, the satellite truss structure antenna, which integrates load-bearing and sensing, addresses the problems raised in the prior art by improving the components in the satellite truss structure unit cell 1 into load-bearing and sensing truss components 11. Specifically, the load-bearing and sensing truss components 11 integrates integrated components, including a biomimetic micro-vibration sensing unit 111, a biomimetic strain sensing unit 112, and a main control chip unit 114. This allows the load-bearing and sensing truss components 11 to perform load-bearing functions while also enabling real-time monitoring of the micro-vibration and strain of individual components or the truss antenna as a whole. This also improves the lightweight nature of the satellite antenna while integrating power supply. At the same time, the integrated components also integrate a self-powered unit 113, a wireless data transmission unit 116, and a flexible circuit unit 115, further realizing a highly integrated and lightweight truss component micro-vibration and strain signal monitoring system.

[0038] In operation, the biomimetic micro-vibration sensing unit 111 and the biomimetic strain sensing unit 112 convert analog signals into digital signals via an analog-to-digital converter (A / D) module and transmit them to the main control chip unit 114. The wireless data transmission unit 116 can use Bluetooth, Wi-Fi, or RF (Radio Frequency) signals to send the acquired signals processed by the main control chip unit 114 to the host computer. Furthermore, through the wireless data transmission unit 116, communication with other cells in other satellite truss structure antennas is achieved, forming a distributed integrated test network for bearing and sensing.

[0039] like Figures 3 to 6 As shown, in another preferred embodiment of the present invention, the biomimetic micro-vibration sensing unit 111, the biomimetic strain sensing unit 112, the self-powered unit 113, the main control chip unit 114 and the wireless data transmission unit 116 are flexibly integrated and electrically connected through the flexible circuit unit 115 to form a thin sheet structure, which is folded and attached to the surface of the load-bearing and sensing truss component 11.

[0040] The flexible circuit unit 115 integrates and electrically connects several components, including the biomimetic micro-vibration sensing unit 111, the biomimetic strain sensing unit 112, the self-powered unit 113, the main control chip unit 114, and the wireless data transmission unit 116, in a flexible manner to form a flexible circuit system. After integration by the flexible circuit unit 115, it can form a thin sheet structure, which can be folded and attached to the surface of the load-bearing and sensing truss component 11, further achieving high integration and lightweight.

[0041] like Figures 7 to 8 As shown, in a preferred embodiment of the present invention, the biomimetic micro-vibration sensing unit 111 or the biomimetic strain sensing unit 112 respectively includes a strain gauge 1121, and the surface of the encapsulation layer 1122 on the strain gauge 1121 is processed with parallel fine grooves 1123.

[0042] Both the biomimetic micro-vibration sensing unit 111 and the biomimetic strain sensing unit 112 mimic the crack sensors on the surface of a scorpion's body. Parallel grooves 1123 are processed on the surface of the encapsulation layer 1122 of the traditional strain gauge 1121 (resistive strain gauge, piezoelectric strain gauge based on PVDF (polyvinylidene fluoride)). The strain sensitivity is increased at the parallel grooves 1123, and then integrated on the surface of the load-bearing and sensing truss component 11. They can respectively undertake the measurement and monitoring of the static bending and dynamic micro-vibration of the component.

[0043] like Figure 9 As shown, in a preferred embodiment of the present invention, the self-powered unit 113 includes a solar cell 1131, a voltage conditioning circuit 1132 and an energy storage capacitor 1133. The solar cell 1131 inputs electrical energy into the energy storage capacitor 1133 and supplies power through the voltage conditioning circuit 1132.

[0044] The solar cell 1131 inputs electrical energy into the energy storage capacitor 1133 via the voltage conditioning circuit 1132 and provides it to the entire circuit system, forming a self-generating sensing device.

[0045] like Figure 10 As shown, in order to facilitate the description of the state of the satellite truss structure antenna, a matrix-based representation method for the load-bearing and sensing truss components can be established. The arrangement of the load-bearing and sensing truss components can be optimized by combining matrix eigenvalues ​​and test data to ensure the vibration modes and deformation on the satellite truss structure antenna.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A satellite truss structure antenna integrated with sensing, comprising a plurality of satellite truss structure unit cells (1), each satellite truss structure unit cell (1) comprising a load-bearing and sensing truss member (11), characterized in that, The bearing and sensing truss member (11) is integrated with: a bionic micro-vibration sensing unit (111) and a bionic strain sensing unit (112) for measuring and monitoring the static bending and dynamic micro-vibration of the bearing and sensing truss member (11); a master chip unit (114) connected to the bionic micro-vibration sensing unit (111) and the bionic strain sensing unit (112) for processing signals collected by the bionic micro-vibration sensing unit (111) and the bionic strain sensing unit (112); a wireless data transmission unit (116) connected to the master chip unit (114) for sending the collected signals processed by the master chip unit (114) to an upper computer; a self-powered unit (113) for power supply; a flexible circuit unit (115) connected to the bionic micro-vibration sensing unit (111), the bionic strain sensing unit (112), the self-powered unit (113), the master chip unit (114), and the wireless data transmission unit (116) for integration and electrical connection; the bionic micro-vibration sensing unit (111), the bionic strain sensing unit (112), the self-powered unit (113), the master chip unit (114), and the wireless data transmission unit (116) are flexibly integrated and electrically connected through the flexible circuit unit (115) to form a sheet structure, which is folded and attached to the surface of the bearing and sensing truss member (11).

2. The load carrying and sensor integrated satellite truss structure antenna of claim 1, wherein, The bionic micro-vibration sensing unit (111) and the bionic strain sensing unit (112) are connected through an analog-to-digital conversion A / D module to convert analog signals into digital signals and transmit them to the master chip unit (114).

3. The load bearing and sensor integrated satellite truss structure antenna of claim 1, wherein, The bionic micro-vibration sensing unit (111) or the bionic strain sensing unit (112) respectively includes a strain gauge (1121), and a packaging layer (1122) on the strain gauge (1121) is processed with parallel fine grooves (1123).

4. The load bearing and sensor integrated satellite truss structure antenna of claim 1, wherein, The self-powered unit (113) includes a solar cell (1131), a voltage conditioning circuit (1132), and an energy storage capacitor (1133), and the solar cell (1131) inputs electrical energy to the energy storage capacitor (1133) through the voltage conditioning circuit (1132) for power supply.

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