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by means of simulation. Secondly, a kind of coordinated control strategy which relies mainly on differential pressure control while altitude control subsidiary is presented. And the controllers based on the strategy are designed. The coordinated control of the pressure difference and altitude is developed, and the performance of the controllers is analyzed by simulation. Key words: stratospheric......
:1672-7207(2016)11-3948-10 Migration characteristics of poisonous gas during construction stage in railway tunnels at high altitude areas CAO Zhengmao1, 2, YANG Qixin1, GUO Chun1 (1. Key Laboratory... atmospheric pressure with the altitude increasing, the concentration of poisonous gas increases exponentially at the same measuring point. The increase in multiples of CO can be calculated by K=eh/104......
in altitude density function (ADF) of the surface topography of mild steel during electrochemical polishing (ECP) was investigated, and the mechanism of the variation of surface roughness with polishing time......
高海拔地区复杂铜铅锌多金属硫化矿浮选试验研究及应用 陈代雄1,曾惠明1,李观奇1,杨建文1 (1.湖南有色金属研究院,长沙,410015) 摘要:试验研究的矿样来自西藏墨竹工卡的复杂难选铜铅锌多金属矿.依据矿石性质,铜铅锌浮选采用铜铅混合浮选,再铜铅分离,铜铅浮选尾矿浮锌的原则工艺流程.该工艺的关键技术是: (1)铜铅混合浮选并采用中矿再磨措施,提高铜铅单体解离度. (2)铜铅分离采用活性炭脱药; (3)CMC,Na2SO3和Na2SiO3环保型的组合药剂作为铅矿物的抑制剂.通过上述技术创新,成功地实现了铜铅分离,并取得良好的选矿试验指标.该工艺率先在西藏两家选矿厂成功地应用. 关键词......
. Small gain theorem and Lyapunov based stability analysis were utilized to prove the stability of the closed loop system. Locally uniformly ultimately bounded tracking of the vehicle’s velocity, altitude......
process. In application, vertical and horizontal CMs are designed and ACAC controllers are constructed to control vertical altitude and horizontal trajectory of PPF based on the proposed CMs... the model predictive control method (MPC) to control the parafoil-payload system. But they deal with the horizontal trajectory tracking problem based on the six-DOF model and the altitude control......
calculated. In addition, the variations of wind load coefficients and wind torque coefficients with different azimuth angles and altitude angles were investigated. The results have great reference... with azimuth angle under different altitude angles 3.2.2 侧力系数 图5所示为太阳能聚光器不同高角度时侧力系数随方位角的变化规律.由图5可知:聚光器高度角为90°时,侧力系数的绝对值很小且不随方位角的变化而变化,此时侧力很小；其他高度角时,方位角为0°和180°时,聚光器测力系数绝对值很小,接近于0,表明此时聚光器所受侧力很小,方位......
of this aerostat involves tradeoffs between conventional airship and high altitude balloon. The sling connection simplifies structure design significantly, but brings challenges for dynamics analysis. Dynamics... platforms flying at a high altitude of 20 km. Therefore, many advanced projects are competing to develop stratospheric aerostat, such as High-Altitude Airship [1], Hisentinel [2] and Google’s Project......
, the dynamic model that considered the effect of wind disturbance was established via Newton-Euler formalism. For quadrotor helicopter flying at low altitude in actual situation, it was more susceptible......
