基于输入扰动观测的全包线变稳控制律设计

Design of Full Envelope Variable Stability Control Law Based on Input Disturbance Observer

变稳机正向全包线范围飞机特性评价发展,其中状态点变化、襟翼/水平安定面对飞行品质的影响都属于未知扰动,经过分析,传统变稳控制律已难以克服此类扰动。为实现现代先进变稳飞机需具备的全包线变稳能力,以短周期特性模拟任务为例,设计输入扰动观测器,对飞机内外部扰动进行了实时估计,并在控制系统中对输入扰动进行补偿。分析表明,上述法可以有效估计并抑制总扰动,可实现优良的短周期模拟性能,具有很强的工程实用性。

The variable stability aircraft is developing towards the evaluation of aircraft characteristics in the full envelope range,in which the change of state point and the influence of flap/horizontal stabilizer on flight quality are unknown disturbances.After analysis,the traditional variable stability control law has been difficult to overcome such disturbances.Modern advanced variable stability aircraft should be able to change stability in the full envelope.This paper researched the short period simulation,an input disturbance Observer was designed,and The internal and external disturbances of the aircraft were estimated in real time,then The input disturbance was compensated in the control system.The research shows this method can estimate and suppress the total disturbance effectively and bring about perfect short period characteristic,it is of great practicability in project performance.