查询词典 reaction wheel

Micro-disturbance of reaction wheel assembly is a key factor affecting the accuracy of spacecraft attitude control.

反作用轮微振动是影响卫星姿态控制精度的重要因素。

Reaction wheel is an important executive component of satellite attitude control system,and the improvement of flywheel system is spurred by high performance satellite attitude control system.

反作用飞轮是卫星姿态控制系统的重要执行元件，提高飞轮系统的性能对卫星姿态控制系统具有重要意义。

First of all, the scheme of attitude stable control system is put forward, then attitude sensors, attitude determination arithmetic and implement devices are introduced. Lastly, reaction wheel system is studied and simulated.

首先给出了姿态稳定控制系统的总体方案；然后具体介绍了本系统所采用的姿态敏感器、姿态确定算法和执行机构；最后对以反作用飞轮为执行机构的姿态主动稳定系统进行了研究，并结合前面设计的控制律进行了仿真。

Attitude control ; Reaction wheel ; Compensation control

姿态控制；反作用飞轮；补偿控制

On the basis of general double closed-loops PID position tracking design of theodilite, the step-by-step integral separate PID control method is introduced, the calculation shows that it can effectively restrain overshoot, track position smoothly, and is helpful to reaction wheel control.

在通常的经纬仪双闭环PID位置跟踪设计基础上，在位置环引入步进式积分分离PID控制策略，计算表明，其可以有效抑制超调，较为平缓的实现位置跟踪，利于反作用轮的角动量平衡作用。

Simultaneously, near minimum-time, eigenaxis rotationmethod based on reaction wheel is validated by half-practicality real-timesimulation.

数学仿真结果表明了这些控制算法的有效性，并显示了联合控制的优越性。

First the dual-body satellite model is established and the control laws of reaction wheel are designed. Based on this the extended Kalman filter estimators with attitude sensor updated by star tracker are designed to provide error corrections for the pseudo-gyro and inertial gyro.

首先建立了双体卫星模型，并设计了动量轮控制律，在此基础上根据星敏感器的测量信息，应用广义卡尔曼滤波器来估计姿态和角速率漂移误差，进而对伪陀螺和惯性陀螺进行校正。

And using it, the above algorithms are tested and verified with experiments. The real time simulation experiments proved that the maneuver algorithms can fast slew small satellite attitude, and the reaction wheel low-speed friction suppressing technique can improve small satellite attitude stabilization accuracy.

为促进上述研究内容的实用化，结合工程实际，研制开发了快速原型实时仿真系统，为现代小卫星姿态控制系统的研制提供了一体化环境，使得实物或半实物实时仿真的快速实现成为可能。

Considering the disturbance of reaction wheel assembly is related with the fixing condition, two methods named 'rigid six-axis test bed' and 'flexible six-axis test bed' were adopted respectively to measure the disturbance. Measurement results of two methods were compared through three aspects.

考虑到反作用轮的扰动与安装条件有关，使用&刚性六分量测试平台&和&柔性六分量测试平台&两种方法进行反作用轮扰动特性测量，并从三个方面对两种方法得到的结果进行比较。

Firstly, based on the sliding mode control and backstepping technique, a new attitude tracking controller is derived to control the attitude motion of spacecraft, the stability of the system is analyzed via Lyapunov method and the reaction wheel dynamics is also considered from the real applications point of view. The whole design process is divided into two steps: the first step is to use sliding control technique to design suppositional adaptive variable structure controller; and the second step is to design attitude tracking controller based on SMC and backstepping technique. Numerical simulations are performed to show that both tracking maneuver and vibration suppression can be accomplished effectively.

首先，采用自适应后步法结合主动振动控制技术设计了姿态跟踪鲁棒控制器，基于Lyapunov方法分析了系统的渐近稳定性；在此基础上，显性地考虑了执行机构动态特性问题，将整个设计过程分为两个步骤：第一步采用滑模控制技术设计了变结构虚拟控制器，给出自适应控制律的设计方法；第二步，将后步法与滑模控制技术相结合，设计了姿态跟踪鲁棒控制器，给出飞轮电压的输入算法及稳定性分析；最后，将提出的控制方法应用于挠性航天器的姿态跟踪控制，通过数值仿真对所提方法的可行性与有效性进行分析和验证。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。