Compensators design for bumpless switching in aero‐engine multi‐loop control system

Abstract

AbstractThe functional requirements of the control system in aero‐engine are increasing due to the multiple objectives. The typical aero‐engine control system is equipped with a multi‐loop control system and switches the controllers to achieve the different performance requirements. However, the aero‐engine fuel flow may be oscillated due to the controllers switch; this phenomenon can seriously damage the performance of the aero‐engine, even its stability. Therefore, the transient switching stability and performance should be concerned. This paper investigates a bumpless compensator design problem for aero‐engine multi‐loop control system. First, a description of the aero‐engine transient bump phenomenon is given, and the design problem is also formulated. Then, we propose a controller compensator method that can smooth the control signal for eliminating the control error. Furthermore, we give the sufficient conditions to guarantee the stability and L1 control problem by using the LMI configuration technique. Moreover, the structure of closed‐loop system with compensators is provided. Finally, a semi‐physical simulation has shown the feasibility of the proposed method.