精度控制

• The second , the main work in the paper is discussed . they are include : the theory and character of electromagnetic leaking from a computer ; the theory of accumulation mean filter and pectination filter ; the analysis of synchronous signal precision , at 10 - 12 second level , for stably intercepting ; the technology requirement of receiver and data acquisition board for clearly displaying the images recovered from the intercepted data
  本文从计算机视频电磁泄漏和数字滤波器两方面的基本理论出发，详细论述了计算机视频信息电磁泄漏的原理及特点，指出视频泄漏信息的频谱是以行频为周期的谱线；分析了重加滤波器和梳状滤波器的性能；分析了视频泄漏信息截获的条件；推导出稳定截获视频泄漏信息需要对同步信号的精度控制在皮秒级；论述了清晰再现对接收机和数据采集卡的技术要求。
• The quality and credibility of ied not only relate with the right design and the material quantity , but also have close relation with the producing process and control of process parameters of ied . it is necessary to ensure that has no overshoot and high accuracy control of pressing powder pressure of nonlinear object ? ied
  火工品的质量及可靠性除与正确的设计、所用材料质量等因素有关外,还与火工品的生产工艺及生产过程中的工艺参数的控制密切相关,必须保证非线性对象火工品压药压力的无超调高精度控制。
• Actual application shows this system can effectively improve projectile dimension measurement precision and give the error distribution . testing result shows the system measurement error less than 10 microns for internal / external diameters and 100 microns for the external length . hence the measurement system can guide the machining processes and helps to control product quality
  实际应用表明该系统可以有效地提高弹体尺寸的测量精度并定量评价弹体的尺寸误差,内外径和同轴度的测量精度可达10微米以内,外长的测量精度可达100微米以内,能有效地指导加工的工艺流程和加工的尺寸精度控制。
• The coordination of flexible robots present the way to overcome these disadvantages , which has abstracted some attention and is being developed in recent years . in this dissertation , on the integration of flexible manipulator and coordinated robots , the cooperation of flexible manipulators manipulating rigid loads is studied in such aspects as system dynamic modeling
  本文将柔性机器人和机器人协调操作两个领域加以融合，以柔性机器人协调操作系统为对象，在柔性机器人协调操作刚性负载的动力学建模、逆动力学分析及仿真、系统的操作性能分析、操作精度控制等方面进行系统深入的研究。
• 3 ) for weak noise interferogram or filtered interferogram , dyadic wavelet can be used to detect fringe edges . a gvf snake model was used to link discrete edges , the linked edges were kept well accordance with fringes of phase map . 4 ) phase unwrapping algorithm based on edge detection is suitable to well separated fringes , the unwrapped phase can be rewrapped to the original phase map
  4 ）对于低噪声情况下或滤波后的干涉条纹图，在基于边缘检测的相位解缠过程中，利用snake模型可以高效准确的实现边缘点的连接，所连接的边缘线与干涉条纹很好的吻合，可将连线的精度控制在三个像元。
• The design had friend human - computer interfaces to monitor the field situation , realized the high precision temperature control with the pid - fuzzy control method , realized the high precision control for motor combining plc with closed - loop control and tension - monitor on - line of variable frequency drives , avoid the hard border and overlapping yarn by four grades stroke modification and changing winding angle incessantly
  利用友好的人机交互界面，实现强大的监控管理功能；利用pid模糊控制实现热箱温度的精确控制；采用plc结合变频器闭环控制和在线张力监测实现电机的高精度控制；通过四级动程修正和持续改变卷绕角，防止硬边和叠丝。
• Meanwhile , this article brings forward a control method on account of magnetic field and designs a high - precision control circuit based on dsp . also , this system detects magnetic field with hall ' s sensor and controls the closed loop system , then controls the output displacement . moreover , this article designs
  同时,本系统采用基于磁感应强度的闭环控制系统,设计了基于dsp微处理器的高精度控制电路,采用霍尔传感器对磁感应强度进行监测,进行闭环控制,以通过对磁感应强度的监测来实现对输出位移的控制,此外,本文还设计了温度检测和反馈控制系统,保证了超磁致伸缩棒工作在恒温环境,减小了附加热变形对工作精度的影响。
• The element leading to problems could be extremely complicated , for instance , insufficient consideration during the model setup ; certain affecting elements vary with different types of ship , like the ship hull deformation , shaft vibration and reinforcing hardness and so on ; inadequate accuracy control and errors during the construction
  导致问题的因素相当复杂，有计算模型的建立过程考虑因素不周；也有一些影响因素的特定性，对于不同的船型而不同，如船体变形，轴系振动，支座刚度等；还有施工过程精度控制不够或施工过程出现错误。
• From the experiment and analysis , it can be seen that friction limits realization of high accuracy electro - hydraulic position servo system , movement of any gimbal brings disturbance moment to servo system of other gimbals and the disturbance moment causes error , and , resolution ratio error and setting error of feedback measurement element are directly added to servo system output
  通过实验和仿真可以看出，摩擦阻碍了转台电液位置伺服系统商精度控制的实现，任何一个框架的运动都会对其余框架的伺服驱动系统产生干扰力矩并引起伺服系统误差，反馈测量元件的分辨率误差和安装误差直接反映在伺服系统输出上，对伺服系统的精度有直接影响。