飞行控制系统的动态相对增益方法研究
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引用本文:周小林,王志燊,王永骥,刘磊.飞行控制系统的动态相对增益方法研究[J].计算技术与自动化,2012,(4):7-11
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周小林,王志燊,王永骥,刘磊 (华中科技大学 控制科学与工程系 图像信息处理与智能控制教育部重点实验室湖北 武汉430074) 
中文摘要:提出一种分析多变量飞行控制系统的动态相对增益方法。从基于时间和基于频率两个方面分别计算了飞行器线性化模型的动态相对增益,通过基于时间的动态相对增益可以得到动态模型在其时间范围内输入量和输出量的关联度,而不是局限于最终稳态点的关联度,通过对一定工作频率范围的基于频率动态相对增益的求取,可对输入/输出量进行合理的配对,以便来分析和设计具有合适的频率特性的飞行控制系统。通过实例求解表明,两种方法所得配对结果一致,将时域和频域方法结合可以得到全面的分析结果。
中文关键词:多变量系统  相对增益  动态相对增益阵  变量配对
 
Dynamic Relative Gain Array Method of Flight Control System
Abstract:A method of analyzing dynamic relative gain array (DRGA) for multiple inputs multiple outputs (MIMO) flight control system is proposed. Both the time-based dynamic relative gain array and frequency-based dynamic relative gain array are calculated for the linear model of aircraft. According to the time-based DRGA, the correlation degree between plant inputs and outputs can be obtained. The correlation degree is about the entire working time, not just the final steady-state point. According to the frequency-based DRGA of working frequency range, the inputs and outputs can be rationally matched, so the flight control system of appropriate frequency characteristics can be analyzed and designed expediently. Case studies show that the same pairing results can be obtained from the two methods, the combination of time-based and frequency-based methods can lead to comprehensive analyzed results.
keywords:multivariable system  Relative Gain Array (RGA)  Dynamic Relative Gain Array (DRGA)  variable pairing
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