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针对运载火箭穿越大风区的减载控制技术进行研究,首先对攻角反馈和加表反馈2种减载技术进行理论研究和仿真分析,得出2种方案对火箭减载都存在一定的局限性。因此引入自抗扰控制器(ADRC)技术并针对飞行减载控制对其进行改进,一方面通过状态观测器将误差补偿引入自抗扰回路;另一方面改进了自抗扰控制器中的控制律,并推导证明了新的控制律下自抗扰控制器抑制风载干扰的能力,给出了控制方程中增益的选择方法。最后以某型液体运载火箭为例在考虑其弹性振动和液体晃动条件下对比了几种方案的减载效果,仿真结果表明改进后的自抗扰控制器使飞控系统抗干扰能力增强,增大了控制律中增益选择范围,有效提高了运载火箭的减载效果,具有很强的工程应用价值。
Aiming at the research of the load-shedding control technology of the launch vehicle passing through the windy region, the theoretical analysis and simulation analysis of the two kinds of load-shedding techniques of the angle of attack feedback and the table-added feedback are carried out. The two schemes have some limitations on the load shedding of the rocket . Therefore, ADRC technology is introduced and improved for flight load-shedding control. On the one hand, the state observer introduces the error compensation into the ADRC; on the other hand, it improves the control of the ADRC And deduced the ability of the ADRC controller to suppress the wind load disturbance under the new control law. The method to choose the gain in the control equation is given. Finally, taking a liquid-type rocket as an example, the load-shedding effects of several schemes are compared under the condition of elastic vibration and liquid sloshing. The simulation results show that the improved anti-jamming controller enhances the anti-jamming capability of the flight control system. Large control law gain selection range, effectively increasing the loading rocket effect, with strong engineering value.