CAJ | 학술논문

研究了一种应用于航天器的高精度、高稳定度的温度控制系统：使用热敏电阻作为温度传感器;采用多级控温策略,核心级采用基于径向基函数（Radial Basis Function,RBF）神经网络比例、积分、微分（PID）控制算法,非核心级采用积分分离式PID算法;采用脉宽调制（PWM）控制作为控制方式。以航天器铷钟作为控制对象,通过铷钟模拟件的热平衡试验,验证了高精度控温系统的控制效果。试验结果表明：核心级施加RBF神经网络PID控制时,稳态控温精度优于±0.08℃;内热源阶跃冲击或外热流正弦扰动下,其温度波动小于±0.1℃,控温稳定度优于0.1℃/d。此精密控温系统可应用于有高精度控温需求的航天器星钟和高分辨率光学相机。
연구료일충응용우항천기적고정도、고은정도적온도공제계통：사용열민전조작위온도전감기;채용다급공온책략,핵심급채용기우경향기함수（Radial Basis Function,RBF）신경망락비례、적분、미분（PID）공제산법,비핵심급채용적분분리식PID산법;채용맥관조제（PWM）공제작위공제방식。이항천기여종작위공제대상,통과여종모의건적열평형시험,험증료고정도공온계통적공제효과。시험결과표명：핵심급시가RBF신경망락PID공제시,은태공온정도우우±0.08℃;내열원계약충격혹외열류정현우동하,기온도파동소우±0.1℃,공온은정도우우0.1℃/d。차정밀공온계통가응용우유고정도공온수구적항천기성종화고분변솔광학상궤。
The paper shows a high-precision and high-stability temperature control system for spacecraft,which uses thermistor as sensor.The system control strategy is step-by-step,using RBF-based nenral network PID control for core stage,using integral separation PID control for others;and using pulse width modulation（PWM） as control mode.The system＇s performance is verified through thermal balance test of rubidium atomic clock simulator.Test results are shown as follows.When the core stage is controlled by nerval network PID control,its temperature change can be within ±0.08℃ in steady case;when it is disturbed by internal heat source or orbit heat flux,the core stage＇s temperature change can be within ±0.1℃ and the temperature stability is ±0.1℃/day.The temperature control system can be applied in precision temperature control for spacecraft atomic clock and high-resolution camera.