PSO-PI-PID Based Negative Regulation Suppression Controller for Flow Adjustable Gas Generators

Due to considerations of safety, reliability and performance, the regulation of the flow adjustable gas generators must cope with the conflict between negative regulation and response speed. In this paper, a switching control scheme for flow adjustable gas generators is proposed based on the PI-PID controller, which is optimized by the particle swarm optimization (PSO) method. Firstly, a switching strategy is presented to schedule the PI and PID controllers according to the stage of the flow regulation process, so that the trade-off between negative regulation and system dynamic performance can be achieved. Subsequently, the PSO algorithm is adapted to optimize the controller parameters. By incorporating relevant performance criteria into the objective function, the parameters of the PI-PID controllers can be optimized to satisfy the requirements of negative regulation and response speed. Finally, the effectiveness of the proposed control scheme is demonstrated by a series of numerical simulation. The results show that the PSO-PI-PID controller significantly reduces the negative regulation and improves the dynamic characteristics. For pressure commands over the entire pressure range, the controller also exhibits good adaptability and regulation performance.