飞机总能量控制系统的研究Ⅱ─—非线性控制律综合与仿真

 在已设计出的飞机总能量控制系统核心环节的基础上,研究了各种高度和速度控制模态下系统的构成和工作原理；研究了各种非线性安全保护功能在系统中的设置与实现；分析了极限推力状态下,飞机质点能量运动的特点；研究了对轨迹和速度的控制优先级的设置与实现技术；最后对此非线性多变量控制系统进行了综合与仿真,得到了满意的设计与仿真结果。

STUDIES ON TOTAL ENEERGY CONTROL SYSTEMS OF AIRCRAFT Ⅱ NoNLINEAR CONTROL LAW INTEGRATION AND SIMULATION

Based on the designed fundamental linear total energy flight control system,various nonlinear flight aItitude and speed control modes are further studied.First,the linear altitude and speed control loops are constructed and designed.Then,various nonlinear operational lim-itations are discussed and implemented in the system. The point-mass energy-state aircraft dy-namic characteristics when engine thrust reaches its limited value are studied,and the control priorities with different weights on either flight speed or flight path are implemented through adjusting the distribution of the certain total energy changing rate ability between flight speed and flight path control channels. Finally,digital simulations of this nonlinear muIti-variable control system are conducted with a Boeing-707 transport aircraft model,and satisfactory sys-tem performance is evaluated.