4results about How to "Reasonable method" patented technology

This invention relates to an equivalent accelerated testing method for plexiglass based on creep constitutive equations, belonging to the technical field of accelerated testing of polymer structures. Addressing the testing requirements for the creep performance of plexiglass structures, this invention shortens the testing cycle and saves testing costs through the design of testing temperature and pressure. Simultaneously, the reduced testing time indirectly saves manpower and material resources, and also reduces the frequency of random risks such as power outages and equipment failures. Therefore, the testing method of this invention has significant timeliness and economic efficiency, and can effectively improve the accuracy of quantitative analysis, possessing important value for engineering practice.

The application provides a window tracking method and system suitable for real-time tracking and measurement of small targets in the air. The relative motion relationship between a measurement satellite and a small target in the air is calculated according to the dynamic data of the measurement satellite and the small target in the air within a measurement time, and the angular position change function of the target relative to the satellite measurement camera visual axis is solved. A suitable tracking window is designed within the field of view of the measurement camera. When the target moves out of the tracking window, the visual axis is quickly adjusted within a certain time, and when the visual axis adjustment is completed, the target is just moved to the center position of the field of view, and the visual axis is repeatedly kept-adjusted-kept to complete the window tracking of the cooperative target. The method is reasonable and easy to implement, and solves the problems of continuous adjustment of the tracking visual axis direction and large on-board calculation load when the measurement satellite and the target are moving at high speed in the air.

The invention provides a chip optical clock temperature self-adaptive dynamic compensation method, which comprises the following steps of: establishing a temperature working point data framework through a brief data corresponding relation between a chip optical clock temperature working point and frequency stability; a distributed temperature sensor network is established to sense the multi-dimensional temperature of the environment; constructing a dynamic compensation model based on a temperature working point data framework and environment multi-dimensional temperature sensing; based on a correction strategy in dynamic compensation model construction, a corresponding compensation algorithm is designed, and by means of the method, adaptive solving of the optimal temperature working point of the chip optical clock and dynamic compensation of temperature fluctuation are achieved, the working performance directly related to the temperature is improved, and the method is easy to implement, reasonable and easy to operate.

The application provides a high-temperature connecting piece evaluation method and system considering stress relaxation, and relates to the technical field of connecting piece performance detection, and comprises the following steps: determining the type of complex load according to the pre-tightening force of the connecting piece; determining the attribute value of the connecting piece according to the complex load type; obtaining the initial equivalent stress level calculation equation under the type of the complex load according to the attribute value and the stress distribution characteristics of the complex load type; determining the Norton-Bailey constitutive equation coefficients A, stress index m and time index n, establishing the equivalent relaxation theory equation, and obtaining the axial average stress of the connecting piece after relaxation in combination with the composition working condition characteristics of each load in the complex load type; and comparing the axial average stress of the connecting piece after relaxation with the preset minimum clamping limit value to evaluate the connecting piece. The application solves the problem of lacking a stress relaxation calculation method for high-temperature connecting pieces under complex load in the prior art.