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设计了一种基于自抗扰控制(ADRC)的面黑体辐射源温度控制系统,通过对系统状态与未知扰动进行实时的观测和有效的补偿,提高了黑体辐射源的控温品质。在实际应用中,为了平衡控制输入大小与扰动估计速度,将扩张状态观测器(ESO)参数β03改造为分段函数以避免扰动估计量过大引起的饱和作用。结合LabVIEW软件的图形化编程,在Compact RIO实时控制器中实现黑体辐射源的温度控制和实验数据采集。通过在控制软件界面中实时观测系统各状态,从而快速有效地整定控制器参数。实验结果表明,ADRC算法能够有效地提高面黑体辐射源的温控品质,温度稳定性达到9mK/10min,并且有着更强的抗扰能力。
A temperature control system based on ADRC is designed to improve the temperature control quality of blackbody radiation source by observing and compensating the system state and unknown disturbance in real time. In practice, in order to balance the magnitude of control inputs and the speed of disturbance estimation, the ESO parameter β03 is transformed into a piecewise function to avoid the saturation caused by excessive disturbance estimation. Combined with the graphical programming of LabVIEW software, the temperature control and experimental data acquisition of black body radiation source are realized in Compact RIO real-time controller. Through the control software interface real-time observation of the system state, so as to quickly and effectively set the controller parameters. The experimental results show that the ADRC algorithm can effectively improve the temperature control quality of surface blackbody radiation source, the temperature stability reaches 9mK / 10min, and has stronger anti-interference ability.