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714results about How to "Simple plan" patented technology

High-accuracy data receiving time service instrument

The invention discloses a high-precision data recording time service instrument. A GPS time-service plate receives the second pulse information of precision and absolute time information through an antenna; the information is then transmitted to a recording control plate and corrects an internal clock in the control plate; strict synchronisation between the control plate and the absolute time is kept; the recording control plate is respectively connected with the equipments to be recorded and a user data collecting computer through communication cables; the user data is received and the commands emitted by a computer is collected in accordance with a communication protocol; the state of the GPS receiver and GPS time and position information are fed back to the user data collecting computer; the communication rate and data frame format of the equipment to be recorded are arranged; the communication with the equipment to be recorded is established; the time-service instrument is convenient to be carried, can work in all areas with GPS satellite signals, is used for providing asynchronous series testing interfaces for the time-service precision requirement of 1 multiplied by 10<-4> seconds; furthermore, the communication rate is 38400bps. The invention is used for testing the true-value equipments which has fixed testing frame length and 38400bps of signalling rate and recording the output data of the equipment to be tested.
Owner:中国人民解放军63891部队

Method for machining thin-wall bearing housing part

The invention relates to the field of machining, in particular to a method for machining a thin-wall bearing housing part. The method comprises the following steps that a blank is forged, and a process construction chuck is reserved; rough turning is carried out, wherein the appearance of a workpiece is roughly turned on a common lathe, a ladder hole of the workpiece is roughly turned, stabilizing treatment is carried out, and the internal stress of the workpiece is eliminated; finish turning is carried out, finish turning is carried out on the workpiece on a numerically controlled lathe, the working allowance of 0.9 mm is reserved on the single side of the outer circle and the single side of an inner hole; rough grinding is carried out, wherein the two end faces of the workpiece are ground on a surface grinding machine, and the depth of parallelism between the two end faces is kept within 0.05 mm; rough grinding is carried out, wherein the construction chuck end face of the workpiece is sucked by a suction cup on a universal grinding machine, alignment is carried out according to the outer circle, and the outer circle, the inner hole and the end faces of the workpiece are ground roughly. The machining process is simple, the scheme is simple and practical, clamp design is reasonable, application is convenient, manufacturing cost is low, the part is easy to dismount, the use effect is good, the machining quality of the workpiece can be ensured, workpiece efficiency can be improved, and the method is suitable for batch production of the large-diameter thin-wall part.
Owner:祝云

High-speed aircraft lifting surface aerodynamic heating structure multidisciplinary optimization design platform

The invention relates to a high-speed aircraft lifting surface aerodynamic heating structure multidisciplinary optimization design platform belonging to the technical field of modern high-speed aircraft designs. In the invention, by aiming at the demands of lifting surface heat vibration analysis in an aerodynamic heating environment when a high-speed aircraft lifting surface is designed and considering the positive correlation among aerodynamic heating structures, an aerodynamic heating structure integrated analysis method including aerodynamic heating calculation, transient heat conduction analysis, structural heat model analysis and non-constant aerodynamic force and heat vibration analysis is researched, and the aerodynamic heating structure multidisciplinary optimization design taking the most dangerous heat vibration speed as the constraint and taking the lifting surface structural quality as a target function is researched to achieve the goal of the optimization design on the high-speed aircraft lifting surface. The invention breaks through the problem that the multidisciplinary design optimization is carried out without combining with the influence of three aspects of aerodynamic heating on the structure in the traditional high-speed aircraft design, provides a set of high-speed aircraft lifting surface aerodynamic heating structure optimization design methods and waysand has the advantages of simple scheme and high efficiency.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Robot real-time corner transition method based on Bezier spline

The invention belongs to the field of track planning of an industrial robot and discloses a robot real-time corner transition method based on Bezier spline. The method comprises the following steps: recording the coordinates of a start point and a transition point of a joint space, the coordinates of a target point and the transition point of a Cartesian space, the transition radius R and the maximum error constraint of the Cartesian space; calculating the coordinates of the start point and the end point of a transition curve of the Cartesian space and the coordinates of the start point of the transition curve of the joint space; calculating the unit vector of the velocity direction of the start point and the end point of the transition curve of the Cartesian space; calculating the coordinates of a middle control point of the transition curve of the Cartesian space and solving a constructor function of a Bezier spline curve; finally performing velocity planning and interpolation. By adopting the method disclosed by the invention, transition radius and maximum transition error constraints are realized during transition between a point-to-point motion command and a linear motion command, and the corner transition between the point-to-point command and the linear motion command is implemented with high efficiency and high quality.
Owner:HUAZHONG UNIV OF SCI & TECH +1
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