8 results about "System model" patented technology

The invention relates to an ultra-supercritical thermal generator set coordinated control system, and belongs to the technical field of generator set coordinated control. An intermediate point temperature control system, a main steam temperature control system, a reheated steam temperature control system, an AGC control system and an ammonia spraying control system are all connected with a DCS module through a corresponding optimized system model controller. A separator outlet mean temperature value module, a separator outlet temperature setting module, a unit load module, and a separator temperature-to-coal-water ratio value correcting module are all connected with the DCS module through the optimized system model controller. The ultra-supercritical thermal generator set coordinated control system is simple in structure, reasonable in design and convenient to use, the purpose of coordinating unit loads is achieved by controlling output force of a boiler and a steam turbine, and the purposes of improving the unit load response speed and precision are achieved through a series of advanced algorithms.

The present invention relates to satellite autonomous relative navigation. In order to solve the problem of long-distance autonomous relative navigation, the present invention provides a relative navigation method using the line-of-sight angle information on the satellite. ;Establish the system model in the modified spherical coordinate system; carry out filter calculation. Compared with the existing technology, its advantages and beneficial effects are: no active ranging equipment is required to work, only the elevation angle and azimuth angle of the target need to be detected by the passive tracking and aiming equipment, combined with the relative navigation initial value, the relative navigation can be passed The filtering algorithm realizes real-time autonomous estimation of relative position and relative velocity, and provides the required information for relative orbit control. The relative navigation with only angle information is realized, so that the active star in the orbital rendezvous mission can realize autonomous relative navigation at a long distance, and the reliability of the rendezvous mission is improved.

The invention discloses a solving method for a six-degree-of-freedom series robot inverse kinematics solution. The method comprises the steps that connecting rod parameters are read in and a robot connecting rod coordinate system model is established; the joint positions of the tail ends of connecting rods are known, and joint position constrained equations are established; all the joint positions are determined according to all the joint position constrained equations; the attitude constraint equations of all joint coordinate systems of a robot are established; the solutions of the joint position coordinates obtained before are substituted in the attitude constraint equations respectively, and each group of joint variable intermediate values are solved according to the attitude constraint equations; and the joint variable intermediate values are analyzed, and an optimal joint variable solution is selected. The positions and the attitudes in the robot inverse kinematics solution are separately solved by adopting the spatial geometry theory so that complexity of geometric inverse kinematics solution operation can be greatly reduced, and the method can be applied to the field of robot space obstacle avoidance.

The invention discloses a method and a system for a stability analysis of a DC (Direct Current)/DC converter. The method comprises the following steps of step S1, performing conversion deduction on aDC/DC converter system model to obtain a state-space equation of the DC/DC converter suitable for a stability analysis method of a discontinuous control theory; and step S2, judging an exponential stability of a DC/DC converter system and calculating an exponential convergence rate of the DC/DC converter by use of the deduced state-space equation of the DC/DC converter according to an exponentialstability analysis method of the discontinuous control theory. According to the method and the system for the stability analysis of the DC/DC converter, the DC/DC converter is described by use of thediscontinuous control theory, the system does not need to be linearized when the DC/DC converter is analyzed, the analysis of the system stability is more accurate, and meanwhile an analysis process is simplified.

The invention discloses a split parallel simulation method for modeling of an aircraft electromechanical system, which comprises the following steps of: analyzing a modal complex characteristic value and frequency response of an aircraft electromechanical system model through a frequency domain analysis principle, calculating and finding a detachable position of the system model, and splitting the system model into a plurality of models with independent input quantities and output quantities; stripping and extracting the input quantity and the output quantity of each split model to become a single data variable, defining one end of each split model as an output end, defining the other end of each split model as an input end, arranging an input module and an output module at the input end and the output end respectively, and writing variable data; adding a capacitive link or an inertial weight link, adding an adaptive module, integrating and unifying models of different software modeling, and achieving parallel simulation. The models do not need to be simplified, simulation precision is not sacrificed, and the architecture of the system becomes clear.

The invention discloses an infrared cut-off film design method reducing 30-degree beam split curve short shift amount. The method comprises the following steps of a, increasing 30-degree incidence conditions and setting the target points with the light transmittance being 50%; b, increasing the 30-degree incidence conditions and setting the target segments with the light transmittance being gradient 0%-50 % ; c, increasing 0-degree incidence conditions and setting the target segments with the light transmittance being gradient 0%-50%; d, using a simplex method and a quantity method alternatively for conducting optimization; e, transforming the tolerance values of target parameters of each segment; f, using a small long wave passing film system model to overlap with two short wave passing film system models, the modules overlapped serve as an original structure, and then the optimization is started. According to the infrared cut-off film design method reducing the 30-degree beam split curve short shift amount, the 30-degree beam split curve short shift amount can be effectively reduced, on the one hand the clear visual angles of shooting lenses and camera lenses can be enlarged to suit the small wide angle application, on the other hand the machining difficult of infrared cut-off film coating films can be lowered, and the light split quality product rate can further be improved within the scope of 2 nm of the negative common difference when T=50%.

The invention discloses a service life prolonging method for a substation computer monitoring system in the technical field of a monitoring system of a power grid enterprise. The service life prolonging method for the substation computer monitoring system comprises the following steps of S1: according to global failure frequency statistical data and design parameters of the substation computer monitoring system provided by Siemens, drawing an annual failure number distribution curve, and through a fitting method, inferring what kind of probability distribution the substation computer monitoring system belongs to; and S2: performing check on board experiment MTBF provided by Siemens through using actual running defect data of the substation computer monitoring system, then calculating apparatus MTBF through an apparatus model according to the board MTBF after the check, calculating cell MTBF through a cell model according to the apparatus MTBF, calculating system MTBF through a system model according to the cell MTBF, and finally estimating respective failure rates by adopting a parameter estimation method according to the respective MTBF.