VTOL aircraft is an under-actuated system with three degrees of freedom and two control inputs.
VTOL空间飞行器是具有三个自由度，两个控制输入的欠驱动系统。
A hybrid input planar five-bar mechanism has two degrees of freedom, and its dynamic model is a highly nonlinear and strong coupling system.
混合输入平面五杆机构具有两个自由度，其动力学模型是一个高度非线性和强耦合系统。
The results of computer simulation of a two-rigid-body system with two degrees of freedom of each rigid body show that the method presented in the paper is feasible and effective.
通过一个各有二自由度两刚体系统的计算机仿真识别，结果表明文中所述识别理论和方法是正确和有效的。
Secondly, dynamic model of deep-hole drilling system with the two degrees of freedom are established in the light of principles of machining chatter in cutting processes.
随后，根据速度反馈和位移延时反馈的颤振原理，建立了深孔钻削加工两自由度颤振动力学模型。
Based on the two degrees of freedom PID control and model-based optimization, a new coordinated control system for distributed utility plants is proposed.
基于双自由度pid调节和模式优化方式，提出了分布式供热(电)动力系统的联动控制方案。
In this model, the tramcar was regarded as two degrees of freedom spring-mass-damper system, and the track was regarded as Bernoulli-Euler beam that locates on continuous and elastic ballast.
模型中，矿车被等效为两自由度弹簧-质量-阻尼系统，铁轨被等效为铺设在连续弹性道床上的伯努利·欧拉梁，矿车与铁轨的振动相互耦合。
In this model, the tramcar was regarded as two degrees of freedom spring-mass-damper system, and the track was regarded as Bernoulli-Euler beam that locates on continuous and elastic ballast.
模型中，矿车被等效为两自由度弹簧-质量-阻尼系统，铁轨被等效为铺设在连续弹性道床上的伯努利·欧拉梁，矿车与铁轨的振动相互耦合。
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