基于自适应平滑死区逆的航天气化炉氧气流量控制

Oxygen Flow Control in HT-L Gasifier Based on Adaptive Smooth Dead Zone Inverse

航天气化炉氧气流量对象具有大噪声、非线性和强干扰特性,氧气流量控制系统自动化程度低。由于氧气阀门具有死区非线性,人工操作和常规控制策略常常无法获得理想的控制效果,因此提出了一种自适应平滑死区逆算法,补偿氧气阀门的死区非线性,再引入氧气主管压力的变化速度作为前馈量,补偿氧气压力波动带来的干扰。自适应平滑死区逆与前馈控制成功应用于航天气化炉氧气流量控制系统,控制效果明显改善。

The HT-L gasifier's oxygen flow has characteristics of large noise,nonlinearity and massive disturbance and its flow control system's automation level is inferior.Manual operation and conventional control strategies fail to obtain ideal control effects because of the dead zone nonlinearity of oxygen valves there.In this paper,an adaptive smooth dead zone inverse algorithm was proposed to compensate the dead zone nonlinearity of oxygen valves and the changing rate of the oxygen's main pipe pressure was adopted as the feedforward to compensate disturbance from the fluctuation of oxygen pressure.The HT-L gasifier's oxygen flow control system based on both adaptive smooth dead zone inverse and feedforward control has significant control effect.