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Vol. 171, Issue 5, May 2014, pp. 7-14




Design and Simulation to Composite PI Controller on the Stratospheric Airship

* 1 Kangwen Sun, 1 Ming Zhu, 2 Bojin Qi, 1 Xiaoming Chen

1School of Aeronautic Science and Technology, BeiHang University, Beijing, 100191, China
2 School of Mechanical Engineering and Automation, BeiHang University, Beijing, 100191, China
1Tel.: 861082338049, fax: 861082339250

*1 E-mail: sunkw100@buaa.edu.cn


Received: 21 March 2014 /Accepted: 30 April 2014 /Published: 31 May 2014

Digital Sensors and Sensor Sysstems


Abstract: In view of the stratospheric airship application requirements on energy storage and management system, based on the topology of DC/DC converter main circuit, the composite PI controller is designed to realize respective control with the Boost mode and Buck mode. Furthermore, limit stop integration method is proposed to achieve a buck-boost complex DC/DC converter boost with effective switching buck. Then, with the MATLAB Control System Toolbox design model, the composite PI controller design and a simulation is accomplished. According to the simulation model, the structure and parameters of the controller to the system can be easily adjusted. Finally, by using the average large-signal switching mathematical model to create sub-circuit in place of the actual circuit model, the whole circuit model of the DC/DC converter is constructed with MATLAB, and then, from the analysis of simulation results, its proved that the method can shorten the simulation time and obtain better convergence of the target.


Keywords: Composite DC/DC converter, Composite PI controller, Case limit stop integration method, Large signal average switch mathematical model.


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