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平流层飞艇驻空飞行阶段的航速和空速量级可比拟,考虑风的影响时,基于地速的动力学模型必须显式补充风引起的附加惯性力,其运动方程将变得很复杂.作者首先依据风场环境下地速、风速和空速之间的关系,推导了基于空速的动力学模型.该模型具有形式简单、与飞艇动力学联系更加密切且无需计算风引起的附加力的优点.其次,建立了基于上述模型的飞艇六自由度动力学仿真模型,并针对标称运动条件下的系统开环输入进行仿真并简要分析了仿真结果.
The velocity and airspeed magnitude of the stratosphere airships in flight are comparable. Considering the effects of wind, the ground-based dynamical model must explicitly replenish the additional inertial force caused by the wind and its motion equation becomes more complex. Based on the relationship between ground speed, wind speed and airspeed in wind farm environment, the author deduces the airspeed-based dynamic model which has the advantages of simple form, more close relationship with the airship dynamics and without the need of calculating the additional force caused by the wind Secondly, the six-DOF dynamics simulation model of the airship based on the above model is established and the open-loop input of the system under the condition of nominal motion is simulated and the simulation results are briefly analyzed.