摘要：Inlet door position control subsystem of auxiliary power unit system is used for controlling inlet door o-pening and closing of auxiliary power unit on the ground and in the air. The control subsystem usually consists of the controller, the electrical actuator and the linkage mechanism. The inlet door position control subsystem of auxil-iary power unit system is a part of the auxiliary power unit control system. The inlet door design, inlet door aerody-namic load analysis and inlet duct design are synchronal processing and interactional. This paper presents a inlet door position control design of auxiliary power unit system. This inlet door position control subsystem uses a sepa-rate controller for inlet door control, which make the APU FADEC hardware and software design complexity low and simplify the interface design. A new inlet door actuation mechanism is applied, whose installation and removal is easy and accessible. The inlet door actuation mechanism has the function of output torque amplification and the out-put torque is adjustable. This inlet door position control subsystem is applied on an aircraft model and demonstra-ted. The inlet door position control subsystem is a good reference to other aircraft model development.%辅助动力装置系统进气风门位置控制子系统用于地面和空中控制辅助动力装置进气风门的打开和关闭,通常由控制器,作动机构(电动作动器和连杆机构)组成。辅助动力装置系统进气风门位置控制子系统的设计是辅助动力装置控制系统设计的一部分,和辅助动力装置进气风门设计、进气风门气动载荷计算分析及辅助动力装置进气道设计同步进行,相互影响。对某型飞机的辅助动力装置系统进气风门位置控制设计方案进行了介绍,该风门位置控制采用单独的风门控制器,降低了辅助动力装置FADEC( Full Authority Digital E-lectrical Controller,全权限数字电子控制器,简称FADEC)软硬件设计复杂度,简化了接口设计；并且设计了一种新型辅助动力装置系统进气风门作动机构,该作动机构安装/拆卸方便,可达性好；具有力矩放大功能,且该机构可调节,能输出不同大小的力矩。该进气风门位置控制子系统经过型号验证,对后续型号研制具有较强的指导性。
