The Prediction of PIO Susceptibility of a Large Transport Aircraft
Flight control system design for large, fly-by-wire aircraft is aimed at providing optimal handling qualities for all mission tasks that the aircraft has to fulfill. Pilot-Induced Oscillations (PIO) are handling qualities deficiencies that are highly undesirable, and have a tendency to show up unexpectedly during developmental flight-testing. Numerous design criteria have been developed that provide guidelines in the design process that should help avoid PIO tendencies of an aircraft. Recently, several category Ⅱ PIO criteria that specifically deal with nonlinearities such as rate and position limiting in the flight control system have been proposed. In this paper, these methods are appraised against an example aircraft that has experienced well-documented category Ⅱ PIOs. Furthermore, two methods are examined that can help reduce PIO susceptibility. The application of a PIO suppression filter, and of phase compensation in software rate limiting elements are evaluated . The effectiveness of both methods is examined. The ideas behind some of the category Ⅱ PIO criteria prove to be useful in this application.
Pilot-Induced Oscillations flight control system rate limiting elements category Ⅱ PIO phase compensation
Ji.Quan.Liu ZHeng.Hong.Gao
National Key Laboratory of Aerodynamics Design and Research Northwestern Polytechnical University Xian, China
国际会议
2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)
大连
英文
2153-2158
2010-07-05（万方平台首次上网日期，不代表论文的发表时间）