某型飞机副翼作动系统静刚度与自然频率设计研究

Design of Actuation System Static Stiffness and Nature Frequency Related to Aileron Surface of Commercial Aircraft

民用FBW系统飞机提高舵面抗振性的主要措施有:操纵舵面质量平衡法;利用作动器阻抗,包括提高作动系统静刚度和自然频率,改善作动系统阻尼特性;气动平衡法;主动颤振抑制(闭环控制)。民机作动系统设计中一般从以上4个方向同时着手,提高作动系统抗振性。从提高作动系统静刚度和自然频率着手,研究了某型飞机法兰式安装下等效刚度计算方法,得出了副翼作动系统自然频率范围。计算结果表明,主机所与供应商共同确定的静态刚度参数满足作动系统颤振抑制的最小自然频率要求,供应商可采用这些参数进入作动器静态刚度详细设计阶段。

Flutter suppression of surface of commercial aircraft FBW system is usually implemented by below measures： First, mass balancing of control surfaces; Second, use of actuator impedance（stiffness/damping） including improving static stiffness and nature frequency of actuation system; improving damping characteristic of actuation system; Third, aerodymamic balancing; Fourth, active flutter suppression（closed loop control）.Normally, actuation system design about commercial aircraft is carried on by above four methods to improve flutter suppression. The calculating method of equal stiffness on flange-Mount Installation is researched in this paper improving static stiffness and nature frequency of actuation system, and measure and nature frequency range is given. The calculated results show parameters given by commercial aircraft manufacturer and supplier meet minimum nature frequency requirements. Supplier can use these parameters to come into detailed design phase of actuator static stiffness.