非线性系统

The stability boundary for a di sturbed electric power system is changed to a coordinate plane after a linear a nd a nonlinear transformation.

提出了基于稳定流形变换的电力系统暂态稳定性计算的方法，推导了状态矩阵有任意对复数特征根时的非线性变换矩阵。

The satisfied results are obtained from the simulation of a SDOF system with nonlinear damping and Coulomb friction.

通过对一个具有非线性阻尼和库仑摩擦的单自由度振动系统的数值仿真，得到了令人满意的结果。

A numerical example is provided in which the characteristic of the coupling system is discussed.

通过一个算例，讨论了该耦合系统的非线性动力特性。

It is showed in wind-vehicle-bridge system vibration analysis that cross wind action can remarkably increase the response of bridge and vehicle. Generally, the response of bridge and vehicle are increased with wind speed and train speed, one case that vehicle is on leeward side of deck is more unsafe than another case that vehicle is on windward side of deck. Nonlinear factors can more influence bridge than vehicle.

风—车—桥系统耦合振动分析结果表明：考虑风的作用会显著增加车辆和桥梁的响应；车辆和桥梁的响应总体上随风速和车速的提高而变大；车辆位于桥道背风侧时较迎风侧时更为不利；非线性因素对桥梁的影响较车辆的要大。

Research on cross beam experiment system based on discrete nonlinear PID control.

基于离散非线性PID 控制的十字梁实验系统研究。

Real-time chaotic secure communication system synthesize the new research achievement of nonlinear theory, cryptology and communication technology, and it will be applied widely in the field of information security.

由于实时混沌保密通信系统综合了非线性理论、密码学以及通信技术的新成果，将在信息安全中具有广阔的应用前景。

Simulation and dynamical analysis are performed on the cubic non-linear transit packaging system under oscillatory surroundings in this paper.

对于立方非线性物品包装系统，许多学者研究了其在不同冲击波形下的跌落响应[1 3 ] 。

Limit cycle flutter of a two-dimensional airfoil in cubic nonlinear aeroelastic system in incompressible flow is investigated.

引 言 在不可压缩流中的二元机翼是一个典型的自激振动的例子，在该系统中引入非线性项一般会产生如Hopf分岔，极限环颤振[1]，周期倍化及混沌等现象。

Then, a typical 5-degree-of-freedom system with cubically nonlinear stiffness was given to show the accuracy of the new method.

然后，以一个含有立方非线性的5自由度强迫振动系统为例阐明了新方法的有效性。

By considering torque characteristics of variable-frequency motors and mesh stiffness as well as backlash nonlinearity in gear transmission,a dynamics model for the cutting system of shield tunneling machine with redundant drives was established. The fluctuation characteristics of torque loads and dynamic cutterhead driving torque in composite strata were analyzed.

复合地层掘进扭矩载荷突变是造成盾构机掘进过程中堵转停机的直接原因，考虑盾构机刀盘驱动变频调速电机特性、转矩传递过程中齿轮啮合刚度及齿侧间隙等非线性因素，建立冗余驱动的盾构机刀盘切削系统机电耦合动力学模型；针对典型复合地层地质条件，对盾构机在上软下硬地层掘进过程中刀盘驱动转矩动态特性进行仿真分析。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。