Analysis Of Strain Strength Of CP? Control Network

The reliability of the measurement control network,including three parts:the accuracy index,used to describe the impact of the spread of random errors on the results;reliability indicators,used to describe the measurement control network resistance to gross tolerance;strain strength analysis,from the average angle Speaking,is used to analyze the impact of system errors on the results.CP? control network as a three-level control network in the highest accuracy of a control network,its quality directly affects the track ride comfort.The current method in the CP? control network measurement data processing,including precision analysis,reliability analysis,and does not include the strain intensity analysis.However,even though the accuracy of the measuring instrument is increasing,the system error is unavoidable for different reasons.Therefore,it is necessary to analyze the strain strength of the CP III control network.As the CP? control network has a completely different characteristics with the traditional control network,,its network,field observation,and data processing are different from the general control network,is the highest level of precision control network.The use of high-precision total station according to the principle of free set-up intersection intersection measurement,due to complex network,large amount of data,the number of redundant observations,complex calculations,the overall adjustment and other reasons,can not achieve manual calculation.Therefore,the CP? control network can not be analyzed by the traditional control network strain intensity analysis method.Based on the study of CP? control network field observation,internal data processing and strain intensity analysis model,this paper explores the strain analysis model applicable to CP? control network.The original observations are as follows:the total observation value of the total station is the horizontal distance and the direction of the station to the CP? control point.The error of the measuring angle system is mainly the direction error,and the systematic error of the ranging includes the fixed error and the proportional error.If the angle or distance observations contain systematic errors,the coordinate parameters are bound to be offset by the principle of the indirect adjustment model.Therefore,we double the measurement error instead of the system error,into the error equation,obtained by the system error caused by the coordinate parameter offset.In this paper,the lateral deviation is calculated from the angle of coordinate migration,and the influence of the coordinate deviation on the orbital fine tuning is analyzed by introducing the 30000 chord smooth ride comfort index in the orbital static detection.On the other hand,In this paper,the deformation of the network is described by stretching,rotation and twisting,and the strain intensity distribution is plotted.It can be seen that the local error caused by the system error on the CP? control network can be seen in the strain intensity distribution.The results show that:CP? control network mesh strength is good,the use of high-precision measurement equipment for measurement,the system error will not have an impact.The results of ride comfort analysis of CP? control network show that the system error does not affect its ride comfort under the existing measurement technology and requirements.Finally,from the perspective of strain strength,the free set method and the triple frame method are compared,and the triple frame method is better than the free set method.