| 吕朝源,杨威,龙建飞,冯启昌,杨志峰.扭摆式微推力测量装置工作环境热噪声抑制试验研究[J].电子测量与仪器学报,2026,40(4):270-277 |
| 扭摆式微推力测量装置工作环境热噪声抑制试验研究 |
| Research on thermal noise suppression of the rotating pendulummicro-thrust measurement device in working environment |
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| DOI： |
| 中文关键词: 微推力测量 热噪声抑制 温度补偿 FPGA 智能控制 |
| 英文关键词:micro-thrust measurement thermal noise suppression temperature compensation FPGA intelligent control |
| 基金项目:重庆市教委科学技术研究项目资助（KJZDK202101506）、重庆科技大学硕士研究生创新计划项目(YKJCX2420402)、国科大杭州高等研究院自主项目(2022ZZ01009)资助 |
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| Author | Institution |
| Lyu Chaoyuan | School of Electronic and Electrical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China |
| Yang Wei | School of Electronic and Electrical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China |
| Long Jianfei | Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences, Hangzhou 310024, China |
| Feng Qichang | School of Electronic and Electrical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China |
| Yang Zhifeng | An Gang Group Yongtong Ductile, Iron Pipe Limited Iiability Company, Anyang 455004, China |
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| 中文摘要: |
| 针对空间引力波探测等重大航天任务中微推力器地面标定面临的高精度需求，以及环境温度波动引起的热噪声严重制约测量装置性能的问题，开展了热噪声抑制技术研究。基于扭摆式微推力测量原理，深入分析了扭丝刚度热弹性效应、结构热膨胀及传感器漂移等误差来源，揭示了环境热噪声对测量精度的影响机理。在此基础上，研制了一套基于现场可编程门阵列（FPGA）控制的精密环境温控系统。该系统采用外部液体循环恒温罩的硬件架构，结合自适应Smith模糊PID控制算法，为测量装置构建了一个高稳定性、抗干扰的准绝热工作环境。实验结果显示，所研制的系统性能优异，成功将核心测量区域的温度波动峰峰值抑制在20 mK以内；与无温控状态相比，扭丝两端的温度梯度降低至原有的0.5%，由温度波动导致的理论测量相对误差从0.66%降至0.003 7%。研究结果表明，该温控系统有效解决了环境热波动对微推力测量的干扰，提升了装置的测量精度与热稳定性，为微推力器的高精度标定提供了关键技术支撑。 |
| 英文摘要: |
| In response to the high-precision requirements for ground calibration of micro-thrusters in major aerospace missions such as space gravitational wave detection, and the severe limitation of thermal noise caused by environmental temperature fluctuations on the performance of measurement devices, this paper conducts research on thermal noise suppression technology. Based on the torsion pendulum micro-thrust measurement principle, a comprehensive analysis of error sources such as the thermoelastic effect of torsion wire stiffness, structural thermal expansion, and sensor drift is performed, revealing the mechanism of environmental thermal noise on measurement accuracy. On this basis, a precision environmental temperature control system based on field programmable gate array (FPGA) control is developed. This system adopts a hardware architecture of an external liquid circulation constant temperature enclosure, combined with an adaptive smith fuzzy PID control algorithm, to construct a highly stable, interference-resistant quasi-adiabatic working environment for the measurement device. Experimental results demonstrate the superior performance of the developed system, successfully suppressing the peak-to-peak temperature fluctuation in the core measurement area to within 20 mK; compared to the state without temperature control, the temperature gradient at both ends of the torsion wire is reduced to 0.5% of the original value, and the theoretical relative measurement error caused by temperature fluctuations is reduced from 0.66% to 0.003 7%. The research results indicate that this temperature control system effectively mitigates the interference of environmental thermal fluctuations on micro-thrust measurement, enhances the measurement accuracy and thermal stability of the device, and provides critical technical support for the high-precision calibration of micro-thrusters. |
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