【摘要】 针对飞行仿真转台的宽频带要求,提出了一种无模型复合控制器设计方法。该控制器设计方法以定量反馈理论为基础,运用功率谱估计的方法在闭环间接辨识转台在各种工况下的开环频率响应特性,并以此获取仿真转台的不确定性范围。同时在控制器设计中,将仿真转台对幅频特性的要求转化为定量反馈理论的跟踪性能边界,对相频特性的要求用前馈环节加以补偿,兼顾了仿真转台对幅频和相频特性的苛刻要求。通过对仿真转台内框控制器的设计仿真以及实验验证表明,该方法能够满足仿真转台的宽频带要求。与其它常用控制器设计方法比较,此方法具有无需建模,设计过程直观的特点。更多还原

【Abstract】 A model-free compound controller design method is proposed to achieve the wide frequency bandwidth requirement of flight simulators. The method based on quantitative feedback theory,acquires system uncertainty under different working conditions through closed-loop identification with power spectrum estimation. Then in controller designing,it makes a tradeoff between the strict requirements for magnitude-frequency characteristics and those for phase-frequency characteristics of flight simulators,by converting the indices of magnitude-frequency characteristics of flight simulators into quantitative feedback theory-based track-ing specification bounds and using feedforward controller to attain the required phase-frequency characteristics. Simulation and experimental results indicate that,when used to design inner frame controller of flight simulator,the proposed method can fulfill the requirements for wide frequency bandwidth indices. Compared with other controller design methods,it has the property of model-free and transparency.更多还原