基于滑模变结构的小型涡扇发动机加速控制

Acceleration Control of Small Turbofan Engine Based on Sliding Mode Variable Structure

该文将滑模变结构控制应用于小型涡扇发动机加速控制,引入广义Gronwall-Bellman引理对滑模趋近运动进行设计,可在一定初始条件下,通过对控制器参数的选取来调节跟踪误差范数边界,使得闭环系统以指数收敛到新平衡状态。以DGEN380发动机为仿真研究对象,利用Matlab/Simulink对上述控制器进行仿真,仿真结果表明,闭环系统能及时地跟踪转速切换指令且系统瞬态响应特性良好,设计的发动机加速控制律能满足航空发动机控制系统的动态性能指标,实现了基于非线性模型的简单加速控制,仿真结果验证了该设计方法的有效性。

The sliding mode variable structure control is applied to the acceleration control of small turbofan engines.The generalized Gronwall-Bellman lemma is introduced to design the approaching motion of sliding mode.Under certain initial conditions,the tracking error norm boundary can be adjusted by selecting the controller parameters,so that the closed-loop system converges to a new equilibrium state exponentially.Taking DGEN380 engine as the simulation research object,the above controller is simulated by Matlab/Simulink.The simulation results show that the closed-loop system can track the speed switching command in time and the transient response characteristics of the system are good.The designed engine acceleration control law can meet the dynamic performance index of the aero-engine control system and realize simple acceleration control based on the nonlinear model.The simulation results verify the effectiveness of the design method.