Electro - hydraulic servo mechanism is an important part of helicopters , the integrity of it ' s function and state of it ' s performance has fatal influence on the safety and behavior of the aircraft , so it is necessary to test the product before application 电液伺服机构是直升机的重要部件之一，其功能的完备性和性能的优劣对于飞行安全和飞行性能都极为重要。
The device equipped with ccd and other equipment will be large and expensive , the maintenance of the equipments are quite difficult . because of these , a new method for measuring the wheelset geometric parameters is given in this paper 在车辆段的轮对检测中，若采用ccd测量方式，需要多套光源和伺服机构，装置体积庞大、成本高、运用维修困难、实测精度不高。
For rotary axes can be made less expensive , easier and more compact than a linear guide at the same precision level , a rotary arm that carries a diamond tool combined with a fast tool servo are used to replace the straight lines 由于旋转抽与同等精度的直线导轨相比，具有制造难度小、成本低及结构紧凑等优点，所以采用具有快速伺服机构的金刚石刀架摆臂代替直线导轨进给运动方式。
This dissertation focused on the design of the computer aided test and control system of a certain product . this system is compatible to manual test , can be used to two series five types servo mechanisms testing processes 因而对其进行性能测试具有重要的意义，本论文讨论某型伺服机构的计算机测控系统设计，系统兼容人工手动测试功能，可完成两个系列，五种型号的伺服机构测试。
In the paper , we expound the total structure design of the measuring instrument , the choose of optics principium , the special optical system which consist of f lens , the design of servo control systemic , and the software and hardware design of light - to - current inversion and control of the servo , and the design of sqc statistical quality control and supervisory system . at last , the accurate of laser beam on - line measuring instrument has been analyzed 本论文完成了检测仪的总体方案设计，仪器工作原理的选择，由f透镜构成的特殊光学系统的确定，伺服机构和伺服控制系统的设计，光电变换及通讯系统的软、硬件设计， sqc统计质量控制与管理系统的设计，最后对激光在线扫描检测系统的精度进行了综合分析。
The transfer function of the servo system in laplace - domain is transformed to time - domain to produce the servo state equations . by solving aerodynamic equations , structure state equations and servo state equations in every time step , the aeroservoelastic problem can be simulated in time domain 将伺服机构的传递函数转化为状态方程和输出方程，在时间域内同时求解结构运动方程、非定常气动力、伺服状态方程和输出方程，实现了带有伺服机构的气动弹性系统的时域仿真。
Later on the base of development of electronics and its application , pid steer appeared which integrated control technology and electronic parts . in the late 1960 ' s , adaptive theory and computer technology developed speedily , then adaptive steer came forth by using adaptive theory in shipping maneuvering . neither pid steer nor adaptive steer shares the character flaws , which results in unassuring effects 后来随着电子学和伺服机构理论的发展和应用，集控制技术和电子器件的发展成果于一体，出现了pid操舵仪； 20世纪60年代末，由于自适应理论和计算机技术得到了发展，将自适应理论引入船舶操纵成为可能，于是形成了自适应自动舵。
Methodology for absolute measurement is proposed by using an outside installation mechanism in laser tracking measurement system , which has an important reference value in practicality in high accuracy assembly and inspection of large - scale mechanical field . spherical tracking servo mechanism " s model described in this paper not only is a new thought but also have much reference value in the mechanical design and other industrial machines design 本文提出的外置式激光跟踪测距系统应用于无导轨曲线测量的设计方法在大型机械现场组装与安装中具有较高的参考价值和实用价值，提出的球形跟踪伺服机构的设计思想，不仅简化了伺服机构，对跟踪伺服机构的设计提供了新思路，而且对机器人设计及其他工业领域机构设计都具有一定的参考价值。
Magnetic marker buried in the road can be used as navigation signals , this signals are collected by build - in - vehicle sensor and are sent to the build - in - vehicle computer , the computer processed and sent instruction or command , automatic running of driverless vehicles can be realized by the steering wheel servo mechanism which connects with step motor 通过埋设在道路上的磁道钉作为车辆控制的诱导信号，由车载传感器进行信号的采集，把采集到的数据信息传送到车载计算机中，通过车载计算机的处理，发出执行指令，利用步进电机连接的方向盘伺服机构以实现车辆在无人驾驶的情况下保持车道的正常运行。
Using the engineering methods of supersonic and hypersonic flow or local piston theory developed in this paper to compute unsteady aerodynamic loads , and coupling structural equations , the supersonic or hypersonic aeroelasticity with a typical servo system under thermal environment is simulated in time - domain 运用超音速、高超音速气动力工程计算方法和本文发展的当地流活塞理论计算非定常气动力，耦合结构运动方程，实现了热环境中带有伺服机构的气动弹性的时域仿真。
