Analysis of load model and design of motion controller for neutron chopper disk
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摘要: 为了实现中子波段调节斩盘相位的高速、高精度控制,分析了系统的负载特性并建立了由斩盘实体和驱动电机构成的二质量系统模型。设计了电流、速度和位置串级控制器,根据控制系统的工程设计方法和现代控制理论给出了3个调节器结构选择及参数整定的具体方法。结果表明：在中子斩盘以旋转频率27.5 Hz工作时,其相位控制扰动误差为-1.325 25～1.325 25 s,稳态误差为 -2.583 s,符合中子斩波器应用要求。Abstract: In order to realize high speed motion control with high precision, the load characteristics of the chopper disk were analyzed, and the mathematic model of the controlled object, which was a two-mass model composed of disk entity and drive motor, was established. Based on this model, a current-speed-position cascade controller was designed, and the select method of the adjusters structure and parameters was given, based on the engineering design method and modern control theory. With a rotation frequency of 27.5 Hz, the position perturbation error ranged from -1.325 25 s to 1.325 25 s, and the steady-state error was -2.583 s, which met neutron choppers application requirements.
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Key words:
- neutron chopper /
- phase control /
- motion controller /
- two-mass load model /
- waveband bias
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