The simplest way to dampen a helicopter's noise is to increase the Angle of the rotor's blades, also called the pitch, and slow them down.
要降低噪音，最简单的方法是增大旋翼桨叶的夹角，也叫“节距”，或是降低转速。
The main blades pitch Angle is controlled by the up and down movements of the swashplate.
大桨的螺距角度是由倾斜盘的上升和下降动作控制的。
To calibrate and compensate the compass error of magnetic heading in a carrier with constant pitch Angle, the deviation compensation algorithm (DCA) for magnetic deviation compensation is put forward.
针对具有恒定俯仰角度载体的磁航向罗差标定和补偿问题，提出了一种用于磁罗差修正的偏差补偿算法(DCA)。
The relationships between the number of diffraction order and grating pitch, refractive index of medium, light wavelength, incidence Angle and azimuth Angle are investigated.
讨论了入射角、入射方位角、入射光波长、光栅栅距、介质折射率与矩形光栅衍射级次数目间的关系。
Analyze the influence of main parameters including exp. area ratio, blade number, collective pitch angle, section shape, cyclic pitch angle and rake angle on the performance of VVP.
本文分析了盘面比、叶数、整体螺距角、周期螺距角、纵倾角、叶剖面形状等主要参数的变化对全方向推进器水动力性能的影响。
The traffic capacity of intersections is usually seriously reduced by the lack of standards on reasonable Angle spacing of urban road intersection and traffic chaos caused by too small pitch Angle.
由于缺乏城市道路交叉口合理角间距的标准，经常存在因角间距过小造成交通秩序混乱，导致交叉口通行能力严重降低。
This paper presents a practical method to calculate the pressure angle at pitch cylinder, of gear drive with computer.
本文提出了一种利用计算机计算齿轮传动啮合角的简便易行的方法。
And to her it seemed that the Angle of his jaw had changed; its pitch had become unpleasantly aggressive.
在她眼里他那下腭已棱角毕露，开合时咄咄逼人。
The average effective pitch damping increases with increasing Angle of oscillation amplitude and decreases with increasing Mach number.
角振幅增大会使返回舱的平均俯仰阻尼增加，马赫数增大使俯仰阻尼降低。
With the theory of kinematics, the universal model of changed Angle and variable pitch spiral groove on any turning surface is researched.
本文应用运动学理论，研究了任意回转体外表面上的变倾角变导程螺旋线的通用模型。
The Angle of attack, pitch Angle and velocity at shifted point for typical trajectory were calculated.
给出了两种控制方法的导引律，计算了典型弹道的攻角、俯仰角和交班点速度等参数。
So, variable structure control theory is used in Angle stabilization of roll, and model - following variable structure control theory is used in acceleration stabilization of pitch and yaw.
因此，本文采用了变结构控制理论设计倾斜角稳定系统，采用了模型跟踪变结构控制理论设计俯仰、偏航通道的加速度稳定回路。
The polar equation of non-circular gear pitch curve, calculation method of center distance, formula of pitch curve length, primary circle radius and pressure Angle is given.
给出了非圆齿轮的节曲线极坐标方程，两齿轮中心距的计算方法，节曲线长度、基础圆半径和压力角的计算公式。
In this paper, the pitch Angle changing of charged particles of the magnetotail under the action of the dawn-dusk electric field is studied by evaluating about 900 trajectories by computer.
本文从粒子的轨道理论人手，通过对近900条粒子轨道的具体计算，研究了磁尾粒子在晨昏电场作用下的投掷角变化。
The paper analyzed the correlation of pitch angle and roll angle, which were measured by magnetic head flying angle adjustment apparatus, and introduced a method of angle adjusting.
分析了磁头飞行角度调校仪器不同工位测量磁头俯仰角和翻转角之间的相关性，并简单介绍了角度调校方法。
Pitch angle control system can change pitch, accordingly regulate the rotational speed and output power by adjusting blade incidence of wind-driven device.
变桨距是通过改变风力机叶片桨距角来改变风力机的转速，从而调整发电机输出功率。
The limit pressure angle is related to such factors as offset angle, mean spiral angle, pitch cone angle and mean pitch cone diameter, not to geometrical shape of the tooth surface.
极限压力角受偏置角、大小轮的螺旋角、节锥角和中点的分度圆直径影响，而与齿面的其他参数无关等结论。
The change rules of aerodynamic parameters including lift coefficient, drag coefficient and pitch moment coefficient have been analyzed when Angle of attack and fuel flow rate is changed.
考虑了不同飞行攻角、不同燃料流率下气动参数，包括升力系数、阻力系数和俯仰力矩系数的变化规律。
This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.
本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。
A method to limit the amplification in a certain range is proposed for restricting the big estimated error of pitch attitude angle.
本文还提出了限定增益系数的方法，以抑制俯仰角过大的估计误差。
On the basis of this model, the nonlinear dynamic inversion method was applied to design the pitch Angle controller of the system working above the rated wind speed.
在此基础上，利用非线性动态逆方法，设计了系统在额定风速以上工作时的桨距角控制律。
The influences of inlet gas flow pitch angle on the sensor output and gas flowage are specifically investigated.
并具体地分析了在气体流量通道入口处气体的流向角度对传感器输出信号以及气体流动状态的影响。
Controlled by structure trap, ore body located in the core of the brachyanticline or pitch part of plunging anticline which was intersected by high angle longitudinal fault.
矿体具体受断裂交汇部位附近的次级短轴背斜轴部、倾伏背斜的倾伏端及其翼部被纵向陡倾角断裂构造所切穿的部位控制，是断裂导矿与背斜构造圈闭的体现。
There are for features for the new method as follows: (1) The stability criterion for the rigid body and the pitch angle of the force between two strips will be deduced according to the energy method.
这种新方法主要有如下四个特点： （1）用能量的观点推导适合刚体的稳定性判据和条间力的倾角。
The equations for thread taper, thread pitch, thread angle and height of thread can be derived on the base of fitted lines, which are accurate enough to meet the needs of industrial measurement.
该方法可测量螺纹的锥度、螺距、螺纹夹角和螺纹高度，测量精度可以满足工业测量要求。
This paper presents a method for machining of taper cutting tools with equal helix Angle. The principle of the method is using taper helical curve with equal pitch to approach equal Angle one.
文章提出了一种在经济型数控机床上实现等螺旋角圆锥螺旋线的加工方法，其原理是用等导程螺旋线去逼近此种曲线。
This paper presents a method for machining of taper cutting tools with equal helix Angle. The principle of the method is using taper helical curve with equal pitch to approach equal Angle one.
文章提出了一种在经济型数控机床上实现等螺旋角圆锥螺旋线的加工方法，其原理是用等导程螺旋线去逼近此种曲线。
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