查询词典 second pendulum

First, the state～space equation of the circular inverted pend ulum system was established based on the Lagrange Equation. On the base of that, the circular inverted pendulum was swung up by the energy control strategy, and the controller of the system was designed by the pole placement of the optimal control theory. Second, in order to realize the observation for the unknown vari ables, stable state observers were designed based on the equivalent principle of sliding mode variable structure.

该方案在采用 Lagrange 函数建立状态空间方程的基础上，利用能量控制策略实现自动起摆；采用最优控制理论中的极点配置法设计倒立摆系统的控制器；同时利用滑模变结构的等值原理设计观测器，实现对系统未知状态变量的观测。

An operational definition of time, wherein one says that observing a certain number of repetitions of one or another standard cyclical event (such as the passage of a free-swinging pendulum) constitutes one standard unit such as the second , is highly useful in the conduct of both advanced experiments and everyday affairs of life.

安业务定义的时间，其中一个说，观测了一些重复的一种或另一种标准的周期性活动构成一个标准的单位，如第二次，是非常有用的情况下先进的实验和日常事务的生活。

The second order mathematical models of inverted pendulum system are expatiated in this paper based on the theory of LQOC(Linear Quadratic Optimal Control), LQY(Linear-Quadratic Yield) controller and LQR(Linear-Quadratic Regulator) are designed to make the inverted pendulum system closed loop stable.

针对倒立摆的稳定控制问题，阐述了二阶倒立摆的数学模型，采用线性二次最优控制理论，设计了倒立摆控制系统的线性二次型调节器和线性二次型输出器，使倒立摆系统闭环稳定。

Aimed at the mathematic problem in the model of the pendulum oscillation,the paper introduces the study on the existence of odd-harmonic solutions to second order semi-linear differential equation which describes the model of the pendulum oscillation by using upper and lower solution method monotone iterative technique and the Schauder fixed point theorem respectively.

针对摆型振动模型中的数学问题，分别采用上下解方法、单调迭代法及Schauder不动点定理研究了摆型振动模型的二阶半线性微分方程奇调和解的存在性。

The differential equations of motion and the state space model of the single inverted pendulum nonconservative damping system are deduced by using the second kind Lagrange equation.

利用第二类Lagrange方程推导了一级倒立摆非保守有阻尼系统的运动微分方程和状态空间模型。

At the fifty-seventh second the door of the saloon opened; and the pendulum had not beat the sixtieth second when Phileas Fogg appeared, followed by an excited crowd who had forced their way through the club doors, and in his calm voice, said, 'Here I

中文12月17日，在爱丁堡捕获了一个名叫杰姆。斯特朗的人。他才是那个真正盗窃英国国家银行五万五千英镑的小偷。现在我们应该来谈一谈这件事在英国社会上所引起的思想波动。

Internal friction in hardened low-carbon nickel steel was measured with a torsion pendulum and an internal friction peak was observed around 155℃ with a frequency of vibration of about 2 cycles per second.

用扭摆测量淬硬低碳镍合金钢中的内耗，当振动频率约为每秒2周时，在155℃附近有一个内耗峰出现。

LI Ming,SHI Shouxia(No.25 Institute of the Second Research Academy,Beijing,100854,China)Abstract:It deduces that the equivalent damping ratio and torsion pendulum which is the main performance parameter of the torque feedback rate gyro is related to the gain and time constant of the head of meter.

速率陀螺仪，在姿态稳定系统中有广泛的应用，主要目的是敏感载体的角速度，通过执行机构，实现对载体的控制和稳定，在位标器上应用陀螺仪的目的是测量天线在惯性空间的转率，实现天线稳定的伺服控制。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。