PCB flying probe checking up system based on step motor is introduced, this paper presents checking up principle and realization of hardware of it. 通过步进电机对飞针的控制,实现了PCB飞针检测系统的定位,并对硬件的检测原理和具体的实现作了分析。
The attitude coordination control problem for formation flying satellites associated with time-varying reference attitude tracking subject to control input saturation is investigated in this paper. 本文研究了跟踪时变参考姿态情况下的控制输入饱和的编队飞行卫星姿态协同控制问题。
Special passengers like infants and those flying to airports without automatic check-in machines can still use paper tickets. 一些特殊乘客,如婴儿及目的地机场无“自助值机”设备的乘客仍可使用纸质机票。
A falling leaf was quietly flying across my window, and gently landed on my letter paper, on which I was writing attentively. 一片落叶,悄悄飞越边窗棂,飘落在我奋笔的纸笺之上!
With the objectives of flying ring athletes in Athens Olympic Games, this paper analyses current flying ring competition characters. 以参加雅典奥运会吊环决赛运动员为对象,分析了当今世界吊环比赛发展的特点。
In accordance with the characteristics of maneuverable-lunched large scale flying vehicle with solid rocket engine, this paper puts forward the general method of establishing a non-linear, time-varied, united simulation model of guidance and attitude control under great attitude condition with complete quantity and total disturbance. 针对固体火箭发动机、机动发射的大型飞行器的特点,提出了建立大姿态情况下全量、全干扰、非线性、时变的制导与姿态控制联合仿真数学模型的一般方法。
The studies of flying qualities during approach to landing for the fly by wire aircraft with control and augmented system were conducted on a fixed base flying quality simulator in this paper. 针对电传控制增稳飞机进行了进场着陆的飞行品质地面模拟试验研究。
The theoretical development of the flying attitude of a flyer plate in explosive welding has been reviewed in this paper. 文中列述了在爆炸焊接中计算飞板飞行姿态的理论发展。
To simplify the computation, the estimate equations of trajectory parameter of boost phase, crossover phase and maneuvering phase in ballistic missile's flying were brought out by approximate treatment according to the motion equation of mass center for missile in this paper. 为简化计算,根据导弹的质心运动方程,通过近似处理导出了导弹机动飞行中助推段、跨越段和机动段弹道参数的估算公式。
The application of equivalent system method to flying quality was introduced briefly in this paper. It consists of the fundamental of equivalent system method, mathematics model and mathematics matching method of equivalent system etc. 本文介绍等效系统方法在评价飞行品质中的应用,包括等效系统方法的原理、所采用的数学模型和进行等效系统拟配的数学方法。
To improve the navigation accuracy of strapdown inertial navigation system ( SINS) in long time flying, the three general errors of attitude, velocity and station and system error were analyzed in this paper. 为提高捷联惯导系统(SINS)长时间工作的导航精度,分析了SINS的姿态角、飞行速度和定位三类基本误差,以及系统误差的表示方法。
Emulations of some applications of this system, such as flying bullet measurement, rotation test, are introduced in this paper. 本文介绍系统在飞行子弹和高速旋转体试验中的应用。
The basic characteristics, forming mechanism, effect of the downburst on flying safety and adoptable measure are briefly introduced in this paper, on purpose to give support to flying safety for pilots and weathermen. 本文根据目前所掌握的资料,对下击暴流的基本特征、形成机理、下击暴流对飞行安全的影响及防范措施作了简要的归纳介绍,以利于飞行和气象人员保障飞行安全。
To realize the joint of docking general test stand smoothly which simulated docking kinetics process of two flying vehicles in space, a locus planning algorithm was put forward on the basis of acceleration control in this paper. 为实现模拟空间两飞行器对接动力学过程的对接综合试验台的平稳对接,提出了一种基于加速度控制的轨迹规划算法。
The control law for short distance guidance and space rendezvous of two spacecrafts flying in nearly circular orbit was put forward based on the relative motion of C-W equations in this paper, which adopted Lyapunov approach. The control model was given. 基于C-W方程的相对动力学模型,用Lyapunov直接法设计了一种运行于近圆轨道航天器的近程导引控制律,给出了控制模型。
Based on a small LAN, an implementation method on visual simulation system of an aerial imaging platform on flying simulator is discussed in the paper. 本文研究了基于小型局域网的航空成像平台飞行模拟仿真器视景系统的实现方法。
And the controlling method of the flying shear in synchronous cutting and braking reset is analyzed in this paper. 在此基础上,针对飞剪的同步剪切及定尺精度要求,研究了两主动曲柄的控制对策。
Aiming at interfering and destroying the characteristic of flying object, the strong light power interfering system of optical-electronic counteraction stabilized platform is analyzed and designed in this paper. 本文针对干扰破坏弹类飞行目标的性能,对光电对抗稳定平台强光能干扰系统进行了分析和设计。
The movement principle and dynamic analysis calculation of crankshaft-slideway type flying shear have been described in this paper. 介绍了曲轴滑轨式飞剪的运动原理及动力分析计算,以求得曲轴滑轨式飞剪在运动时各构件所受的载荷。
The research on free flying space robot is introduced in this paper. 本文对自由飞行空间机器人的研究进行了介绍。
Through the analysis on the present of flying area in Shanghai Pudong International Airport, combined with the airport general and construction plan ( revised in 2004), the need to underground crossing of flying area has been analyzed in this paper. 在分析上海浦东国际机场飞行区现状的基础上,结合2004年修订后的浦东国际机场总体规划及浦东国际机场建设计划,分析了浦东国际机场飞行区地下穿越的需求。
The effect of flying ash and slag powder on the work and mechanics performance of dry-mixed mortar was studied in the paper. 本文研究了粉煤灰、矿渣微粉单掺和双掺等量取代水泥对干粉砂浆的工作性能和力学性能的影响,并对作用机理进行了分析。
How to use data gotten is ground tests to estimate the performance parameters and the reliability in future flying is studied in this paper. 文章研究了如何利用发动机地面试验数据,来评估飞行中的性能参数及其可靠性。
Combining with the typical flying accident, the primary factors causing airliner landing performance penalty in actual flight are discussed in this paper, which are excess approach airspeed and altitude at runway threshold, faulty touch down technique and braking system operation. 结合典型飞行事故案例,讨论分析了在实际飞行中导致民航客机着陆性能恶化的主要因素,即高高度大速度进场、不正确的接地技术以及刹车使用不当等。
Because it is important for unburned carbon of flying ash to influence the coal combustion economic, this paper study the coal burnout characteristics by Thermo-gravimetric analysis and drop furnace method and the coal combustion economic by itself characteristics. 鉴于飞灰含碳量对煤燃烧经济性影响的重要性,本文用热重分析方法及沉降炉法对煤的燃尽特性进行了研究,从煤的自身特性对煤燃烧经济性进行了研究;
Besides, the design of blasting parameters and reasonable firing sequence, technological measures for ensuring building collapsing and preventing flying rocks, the check of blasting vibration velocity were presented in this paper. 文中还介绍了爆破参数和合理起爆顺序的设计、保证楼房倒塌和防飞石的措施、爆破振动速度的验算。
But the engine thrust cannot be measured when aircrafts are flying. In this paper, correlation analysis and neural networks techniques are used to design nonlinear thrust estimators, which can calculate aeroengine thrust in real time with several sensed parameters as the inputs. 针对在飞行中推力无法直接测量的情况,本文使用了相关性分析和神经网络技术设计了非线性推力估计器,使用若干测量参数作为输入,实时计算出发动机的推力值。
Principle of the acoustic temperature measurement has been studied. As the acoustic thermometry measures the temperature by active acoustic signal, the spectral characteristics are known. The acoustic wave flying time measurement method is proposed based on second related technology in this paper. 由于声学测量采用主动声源,声源信号频谱特性已知,本文研究了基于二次相关技术的声波飞行时间估计算法,详细介绍了算法原理。
Proposed for continuous extrusion production line Flying Saw program. Second, the paper Flying Saw synchronous transmission mechanism are explained. 提出了适合连续挤压生产线上的飞锯机方案。第二,论文对定尺飞锯机同步传动机构进行说明。
The indoor unmanned airship is the research object, and designed the flying control algorithm. Firstly, the paper judges the feasibility of the airship control, and lays a foundation for the airship auto-control. 以室内无人飞艇为研究对象,设计出飞行控制算法,通过建模先判断飞艇自主控制的可行性,为进一步研究飞艇自主控制奠定基础。