Since the general longitudinal control schemes for UAV has high cost,drastic attitude change and great over-shoot in height tracking,a longitudinal control scheme based on acceleration was designed,and the longitudinal linear motion model of UVA was established. The acceleration-based longitudinal control equationand control block diagram are introduced. The hardware needed for longitudinal control is given. The specific design steps of the control parameters are presented. The mathematical simulation of level flight,climbout and decline was conducted. The simulation results are compared with the mathe-matical simulation results of conventional longitudinal control law. Simulation comparison results show that the proposed scheme has good anti-interference ability,smooth attitude change,high-accuracy height tracking,fast speed and no overshoot,which is suitable for the longitudinal control of various UAVs.%针对无人机常规纵向控制方案成本较高、姿态变化剧烈、高度跟踪超调大的问题,设计一种基于加速度的纵向控制方案.建立了无人机纵向线性运动模型,介绍基于加速度的纵向控制方程和控制框图,给出纵向控制所需的硬件,提出了控制参数设计的具体步骤,进行了平飞、爬升和下降三种状态数学仿真,并与常规的纵向控制数学仿真结果进行了对比.仿真对比表明,基于加速度的纵向控制方案成本抗干扰能力强,姿态变化平稳,高度跟踪精度高、速度快、无超调,适用于各型无人机的纵向控制.
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