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飞机防滑刹车控制系统是重要的机载设备,对飞机的安全起飞和着陆有着重要作用。NASA研究数据表明,传统的PD+PBM控制律在混合跑道刹车性能下降,且在低速段容易出现严重的打滑现象,导致系统刹车效率降低。对飞机防滑刹车系统的工作原理进行了分析,针对传统控制律的不足,提出了一种基于免疫PID的新型刹车控制策略。在计算机建立的飞机模型基础上,把刹车控制单元接入仿真回路,建立了半实物仿真系统,并将所提出的控制策略在变结合系数跑道上进行了刹车模拟试验。试验结果表明,该控制策略很好地改善了传统控制律的不足,有效地抑制了机轮打滑,大大提高了系统的刹车效率,缩短了刹车距离。
Aircraft anti-skid brake control system is an important on-board equipment, the aircraft’s take-off and landing safety plays an important role. NASA data show that the traditional PD + PBM control law decreases the braking performance of the hybrid runway and is prone to severe slippage in the low speed section, resulting in a reduction of braking efficiency of the system. The working principle of aircraft anti-skid braking system is analyzed. Aiming at the deficiency of traditional control law, a new braking control strategy based on immune PID is proposed. Based on the airplane model built by computer, the brake control unit is connected to the simulation loop, and a semi-physical simulation system is established. The proposed control strategy is tested on a variable combined coefficient runway. The experimental results show that this control strategy can effectively improve the deficiencies of the traditional control law, effectively suppress the wheel slip, greatly improve the braking efficiency of the system and shorten the braking distance.