Because the working environment of the industrial site is often very bad,the computer control system is inevitably subject to various disturbances.These disturbances may affect the accuracy of the measurement and control system,reduce the performance index of the system,reduce the reliability of the system,and even cause the system to run chaotically or fail,resulting in production accidents.Interference may come from the outside or from the inside;it acts on the control system through different ways,and the degree of its effect and the consequences are related to the nature of the disturbance and the intensity of the disturbance.Interference exists objectively,and the research on anti-interference technology is to identify the source of interference and explore measures to suppress or eliminate interference,so as to improve the reliability and stability of the computer control system.
由于工业现场的工作境往往十分恶劣,计算机控制系统不可避免地受到各种各样的干扰。这些干扰可能会影响到测控系统的精度,使系统的性能指标下降,降低系统的可靠性,甚至导致系统运行混乱或发生故障,进而造成生产事故。干扰可能来自外部,也可能来自内部;它通过不同的途径作用于控制系统,且其作用程度及引起的后果与干扰的性质及干扰的强度等因素有关。干扰是客观存在的,研究抗干扰技术就是要分清干扰的来源,探索抑制或消除干扰的措施,以提高计算机控制系统的可靠性和稳定性。
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