Secondary power system(SPS)is a complicated airborne system which undertakes varieties of key tasks.Three typical SPSs of mechanical link,pneumatic link and electric link types were introduced with examples of U.S.fighters,and their advantages and disadvantages were summarized.The research on SPSs developed by U.S.force and defense contractors was reviewed and analysis on technical feature of these SPSs was conducted.Besides,four key technologies in advanced SPS were summarized and the extended applications of SPS were briefed.Finally,the development trend of SPS was prospected.Four key technical characteristics of advanced SPS in future were presented:multiple electric architecture,high integration of structure,comprehensive utilization capability of onboard energy and synergies between main engines and itself.
secondary power systemauxiliary power unitmore electric technologystarter/generator technologythermal management technology
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