Volume 36, Number 6, December 2018
|Page(s)||1102 - 1107|
|Published online||12 March 2019|
Design and Test Evaluation of Full Authority Digital Electronic Control System for an Auxiliary Power Unit
School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China
2 Xi'an Aeronautics Computing Technique Research Institute, AVIC, Xi'an 710065, China
3 Military Resident Representative Bureau of Rocket Force in Jinzhou, Jinzhou 121000, China
A helicopter auxiliary power unit (APU) is initially equipped with a hydro-mechanical control system (HMC). Because HMC's complex structure is difficult to be modified to realize sophisticated control algorithms and the APU is faced with the need for performance improvement, it is urgently necessary to carry out digital control modification of HMC. Based on the analysis of control laws of the original HMC and differences between HMC and digital control system, key techniques involved in the digital control system are studied, such as overall structure, control laws and fuel system based on electric fuel pump, and finally a full authority digital electronic control system (FADEC) is developed for APU. Functions, performances and key techniques of the FADEC system are evaluated on test rig, and the test results show functions of original control system are enhanced and performances of APU are improved more effectively under the control of the designed FADEC compared with the original HMC.
Key words: auxiliary power unit / FADEC / electric fuel pump / test bed testing
关键字 : 辅助动力装置 / 全权限数字电子控制 / 电动燃油泵 / 台架试车
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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