36results about How to "Intuitive description" patented technology

The invention relates to a three-axis linkage contour error compensation control method for cylinder cam machining. The method carries out contour error calculation and compensation during an interpolation machining process according to the linkage of axis A, axis X and axis Y, and is characterized in that the method comprises the steps of in each sampling cycle detecting the actual location of the worktable of axis A, axis X and axis Y in a machine tool coordinate system; converting into a space rectangular coordinate system and approximating the distance between the actual cutter location point and the line connecting with the two closest interpolation points on the tool path of the cylindrical cam contour at contour errors; converting into the machine tool coordinate system to obtain the corresponding contour errors of axis A, axis X and axis Y; and introducing a scaling factor, acquiring the contour error compensation quantities through proportional control, separately stacking the contour error compensation quantities with the location control quantities of shaft A, shaft X and shaft Y to follow errors, and outputting to a servo actuator. The method provided by the invention has the advantages that during axis A, axis X and axis Y linkage machining contour error description is intuitive, calculation precision is high, and contour error compensation method is simple and effective.

The invention discloses a reliability distribution method and apparatus based on immune genetic optimization, and relates to the field of reliability distribution. The method comprises the following steps: eliminating devices with selected models and devices with determined reliability indexes, and then according to operation working conditions of residual devices, carrying out system reliability modeling; constructing full-life cost function and obtaining a function taking the system full-life cost as an object; and randomly generating initial population, screening antibodies in the population, operating adaptive intersection and variation operation of a genetic algorithm, next, operating an immunization algorithm, extracting a vaccine, vaccinating the antibodies, then classifying the antibodies with higher fitness into new-generation population, determining whether the new-generation population is convergent, if so, outputting a distribution result, and otherwise, returning the antibody screening step. According to the invention, minimization of full-life cost is taken as a distribution object, the immunization algorithm and the genetic algorithm are combined together in a distribution process, and the method and apparatus provided by the invention are applied to task reliability distribution of a complex system.

The invention discloses a trigger method based on oscilloscope measurement parameters. First, the ADC acquisition data is collected, and the ADC acquisition data is compared with preset high and low level values ​​to determine the rising edge and falling edge of the input analog signal, and then Select a trigger method in the alternative trigger methods. The alternative trigger methods include three types: time parameter trigger, amplitude parameter trigger, and combination parameter trigger. Different trigger methods use different trigger judgment methods. Each trigger method Both use the measurement parameters of the oscilloscope directly as the trigger conditions. When the trigger conditions are met, a trigger signal is generated to control the storage and reading operation of the ADC sampling data, thereby completing the parameter trigger function of the oscilloscope. The invention uses the measurement parameters of the oscilloscope directly as the trigger condition, thereby more intuitively and accurately describing the characteristics of the target waveform, helping the user to find out the target waveform part more conveniently and quickly, and is also convenient for the user to understand.

A method for evaluating the damage degree of earthquake disasters based on aerial photography of UAVs. UAVs are used to hover over the earthquake-stricken areas and collect images. According to the manual interactive method, the area of ​​interest in the disaster area image is circled, and the gray-scale co-occurrence matrix texture feature, Tamura texture feature, Gabor wavelet texture feature, line and circle feature of the selected area are selectively calculated, and finally the support The vector machine classifier is used to evaluate the damage degree of earthquake disasters. This method is more suitable for early information collection and evaluation in the earthquake and secondary disaster areas caused by earthquakes.

The invention discloses a real-time gait analysis method based on motor current and sensor feedback, comprising the following steps: 1) debugging equipment; 2) wearing equipment: making the human body to be tested complete the wearing of the lower limb exoskeleton robot; 3) setting the motion mode , step length, step height, and gait cycle to form motion parameter data; the motion mode is passive mode, and the gait trajectory of the human body to be tested is controlled by the lower extremity exoskeleton robot; 4) Obtain walking gait data: including the joints in the walking process , and the current value of the motor corresponding to each joint and / or the torque value of each joint; 5) Integrate the data and display it in a chart; 6) According to the chart, analyze the gait function or ability of the human body to be tested. The state analysis method is standardized and integrated, and automatic analysis is realized at the same time. The output results provide reliable medical data for doctors and therapists, and provide a reliable training basis for subsequent adjustments to rehabilitation training programs.

The present invention relates to an analytical method for the double convective heat dissipation performance of a rectangular heat sink with an eccentric heat source. By dividing the heat source area into a uniform grid, combined with the heat loss matrix and the non-uniform heat power matrix in the heat source area, iteratively calculates the excess temperature of all nodes in the heat source area. Iteration value, use the difference between the average value of the excess temperature iteration result and the average value of the previous iteration result to judge the convergence of the iteration result, count the local maximum value of the excess temperature in the heat source area, divide the grid on the upper and lower surfaces of the area without the heat source, and calculate the nodes Excess temperature and average value, to obtain the total power of convection heat dissipation on the upper and lower surfaces of the heat source area, according to the local maximum value of excess temperature in the heat source area, the average value of excess temperature on the upper and lower surfaces of the heat source area and the total power of convection heat dissipation, two-dimensional heat source The uniform heating power is used to obtain the maximum diffusion thermal resistance corresponding to the heat dissipation from the heat source to the upper and lower surfaces of the heat sink, and the maximum total thermal resistance between the heat source and the environment. The present invention can intuitively describe the heat dissipation problem and obtain more comprehensive data.

The invention provides a human body sound signal processing and analysis method, comprising: step 1, collecting human body sound signals with fixed content and processing to obtain power spectrum data; step 2, dividing the frequency range of the five-tone series, and calculating the frequency range of each sound series Power spectrum data accounts for the proportion of power spectrum data in the frequency range of the five-tone series; Step 3, according to the ratio of each fixed content in the fixed content, assign weights and carry out weighting statistics; Step 4, each fixed content of the fixed content The weighting statistical results of the corresponding sounds are added to obtain the total weight range; step 5, divide the total weight range into weight stages, and summarize the characteristics of the human body according to the characteristics of the sounds in different weight stages. The present invention can describe human voice features more intuitively, comprehensively and accurately.