基于激光测距的飞艇净重在线计算方法研究

通过对三维建模软件CATIA中的飞艇副气囊模型进行切片分割，获得了不同副气囊高度下的对应体积值，使用最小二乘法建立了副气囊中心点高度与副气囊体积的三次曲线拟合公式，采用相位式激光测距仪对副气囊中心高度测量，使用该公式可以估算出副气囊的实时体积大小，从而推算飞艇净重大小，掌握飞艇的压力高度和起降能力。使用某次飞行试验对副气囊高度测量的数据计算出的飞艇净重值，与多次地面称重数据一致性较好，验证了使用激光测距仪对大型飞艇净重进行在线评估的可行性，并使用该方法对某飞艇某次飞行试验过程中的净重进行了分析，对飞艇的压力高度进行了核算。

Research of Online Evaluating Method of the Static Heaviness of Airship Based on Laser Rangefinder

Through splitting the model of airship′s ballonet in CATIA, the values of the volume under different height of the ballonet was obtained. The least square method was used to establish the cubic curve fitting formula of ballonet’s center height and volume, and the phase laser rangefinder was used to get the height of the ballonet, so the volume of ballonet was calculating in real time by this formula. Furthermore, the static heaviness of the airship was evaluated and the pressure height of the airship and the ability of taking off and landing were abstained. During a flight test，the values of the height of ballonet was used to calculate the airship′s static heaviness, these results agreed with the weighting data on ground every time before taking off. It validated the feasibility of evaluating the static heft online by laser rangefinder. During a flight test, this method was used to analyze the variation the static heaviness and the pressure height was validated.