基于自适应滑模的气量调节系统执行器故障工况下的自愈调控策略

针对往复式压缩机气量调节系统中存在的执行器失效、偏移等问题，提出一种基于滑模变结构容错控制的自适应自愈调控方法。首先，通过推导气量调节系统的热力学公式，得到输出缓冲罐压力与可调负荷之间的非线性状态空间方程；然后，通过引入自适应控制参数在线调节控制器输出，在确保设定值跟踪性能的前提下提高其对外部干扰和执行器故障的鲁棒性；随后基于Lyapunov方法证明了闭环系统的稳定性；最后通过数值仿真验证了所提的自适应滑模控制策略能够有效地对执行器故障工况下的往复式压缩机气量调节系统进行自愈调控，为系统的稳定性和鲁棒性提供保障。

A self-healing control strategy based on an adaptive sliding mode under actuator fault conditions in a flow regulation system

In order to solve the problems of actuator failure and deviation in the stepless flow regulation system of a reciprocating compressor, an adaptive self-healing control method based on a sliding mode variable structure fault-tolerant control is proposed in this paper. The nonlinear state space equation between the output buffer tank pressure and the working load is first obtained by deducing the thermodynamic formula of the flow regulation system. Then, by introducing adaptive control parameters to adjust the controller output online, the setpoint tracking performance is improved, as is its robustness in the face of external disturbances and actuator failures. The stability of the closed-loop system is subsequently proved based on the Lyapunov method. Finally, the numerical simulation results show that the proposed adaptive sliding mode control strategy can effectively recover the gas flow regulation system of the reciprocating compressor under actuator fault conditions, and ensure the stability and robustness of the system.