22 results about "Simulation test" patented technology

The invention discloses a performance testing system and method for an autonomous vehicle. The method comprises the steps: obtaining a testing demand, and generating an offline testing parameter and/or online testing parameter according to the testing demand, wherein the offline testing parameter is used for configuring the offline simulation test of equipment on a to-be-tested vehicle, and the online testing parameter is used for configuring the real drive test of the to-be-tested vehicle; carrying out the offline simulation test of the to-be-tested vehicle based on the offline testing parameter, and obtaining a testing result; carrying out the real drive test of the to-be-tested vehicle based on the online testing parameter, and obtaining a testing result. The system and method providedby the invention can achieve the integrated test, comprising the offline test and the real drive test, of the autonomous vehicle according to the actual testing demand. Compared with the prior art, the system and method can obtain a more accurate and complete testing result.

The invention provides a light source spectrum modulating device. The light source spectrum modulating device comprises a light source, a first collecting optical unit, a chromatic dispersion unit, a digital micromirror array, a second collecting optical unit and a light uniformly blending unit, wherein the first collecting optical unit is used for collecting the light irradiation of the light source; the chromatic dispersion unit is used for chromatically dispersing the light irradiation collected by the first collecting optical unit, and imaging; a digital micromirror array is formed on a focal surface of the chromatic dispersion unit and is used for controlling the overturning state of each micromirror in order to select different spectrum positions and spectrum bandwidths; the second collecting optical unit is used for collecting the light irradiation reflected by the digital micromirror array again and transferring the collected light irradiation into the light uniformly blending unit; and the light uniformly blending unit is used for blending and recombining the separated single-light irradiation. By adopting the light source spectrum modulating device, the light source spectrum can be distributed again, and the distribution characteristic of the light source spectrum can be changed; the light source spectrum modulating device can be applied to the field of calibrating of optical instruments and simulation test; and by adopting the technology provided by the invention, the calibrating precision of the optical instruments and the simulation test capacity can be improved.

The invention discloses an anti-gas-channeling simulation test apparatus in a later stage of well cementation. The apparatus comprises a bearing rod, a cement sheath inner tube, a cement sheath outer tube and a shell which are arranged in order from inside to outside, wherein a first sealing cavity is formed between the bearing rod and the cement sheath inner tube; the inner cavity of the bearing rod is communicated with the first sealing cavity; the inner cavity of the bearing rod is communicated with a first connecting hole for injecting a medium; a second sealing cavity is formed between the cement sheath inner tube and the cement sheath outer tube; the second sealing cavity is communicated with a second connecting hole for injecting the medium; a third sealing cavity is formed between the cement sheath outer tube and the shell; and the third sealing cavity is communicated with a third connecting hole for injecting the medium. The apparatus can simulate the size of hardened cement paste in full-scale, simulate loading conditions of the hardened cement paste in all directions and study sealing completeness of the hardened cement paste, is convenient for taking specific measures to improve a cement slurry system, and is helpful for increasing the anti-gas-channeling performance in the later stage of the hardened cement paste, thereby increasing the quality of the well cementation.

The invention relates to an imbedded time system in computer industry. It comprises establishing static chart, dynamic chart, automatic generation of timing chart and time sequence chart. The beneficial effect is the module can function in the timing operation system of all kinds of chips, sufficiently reflecting the system module and each aspect, greatly improving the accuracy and feasibility of the module, with good automatic generation, reduced module building period and improved accuracy, with less coding process, compiling and analog testing of the overall development process.

The invention provides an environment simulation test case and an environment simulation method. The environment simulation test case comprises a case body forming a work cavity inside, a heat exchanging device communicated with the work cavity via an air inlet and an air outlet to change the temperature of the work cavity, a vacuum generation device communicated with the work cavity via a pumping port to reduce air pressure of the work cavity, an ozone generation device communicated with the work cavity via an ozone outlet to provide ozone air to the work cavity, and a sample installation bench and a ultraviolet radiation lamp set both disposed in the work cavity, wherein samples can be placed on the sample installation bench; and the ultraviolet radiation lamp set can illuminate the sample. The environment simulation test can meet demands for reliability test for near space aerocrafts indoor.

The embodiment of the application provides an aircraft guidance control simulation test method and device. The method comprises the steps: respectively building subsystem models of all controlled objects corresponding to a preset guidance control system model of an aircraft based on historical simulation engineering data of the aircraft; establishing a guidance control simulation system of the aircraft in a virtual simulation environment according to the guidance control system model of the aircraft and each subsystem model; performing simulation verification on the operation state of the guidance control simulation system so as to debug operation parameters of the guidance control simulation system according to a simulation verification result; and accessing preset hardware equipment intothe guidance control simulation system to carry out a semi-physical simulation test for the aircraft. According to the application, the integrated simulation test between the guidance control systemand the controlled subsystem of the aircraft can be effectively realized, and the accuracy and reliability of the aircraft guidance control simulation test can be improved by providing an open and extensible virtual integrated simulation and test environment.

The invention provides a fuzzy control method for wind power generation grid-connected running. The fuzzy control method comprises the following steps of firstly, building a wind power generation experiment system, wherein the wind power generation experiment system comprises two groups of wind power generators, two groups of AC/DC rectifiers, two groups of DC/DC converters and a public load, and the two groups of wind power generation devices are used for jointly providing electric energy for the load to use; secondly, building a mathematical model of the wind power generation experiment system according to a physical principle, wherein the mathematical model belongs to an interconnection system with two non-linear sub-systems; and finally, designing a distributed state feedback fuzzy controller based on the mathematical model, and giving out a simulation test platform of the system. With the distributed fuzzy control method provided by the invention, safe and stable running of a wind power generation network can be ensured.

Provided in the invention is a steady-state-temperature-field-included simulation test bench of an aero-engine combustor. The simulation test bench comprises a box body, a combustion chamber simulation device, a test device, an air supply system, a ventilation system, a cooling system and a control system. The ventilation system includes an air suction type exhaust hood installed inside the lowerbox body and a wall-mounted industrial ventilation fan installed at the top of the box body. The air supply system and the cooling system are installed inside the lower box body. The control system includes a controller installed inside the lower box body and a human-machine interaction device installed on the outer side of the box body; and the controller is connected with the wall-mounted industrial ventilation fan, the human-machine interaction device, the combustion chamber simulation device, the test device, the air supply system, and the cooling system respectively. The simulation test bench can be used for simulating the actual working condition of the aero-engine combustion chamber; and the enabling performance of the thermal barrier coating material is studied preliminarily beforerun trial examination of the ground track. The steady-state-temperature-field-included simulation test bench has advantages of low cost, short cycle and low risk and the like.

The invention relates to a method for researching influence of a floating plate wave suppression structure for inhibition of forced fluctuation of liquid in a tank on driving safety of a vehicle. Experimental researches are conducted by use of a method of ANSYS FLUENT fluid dynamics analysis software in combination with a physical simulation test; and the application of the fluid dynamics analysissoftware provides a certain reference for establishment of a physical simulation test bench and setting of a test program. The method is characterized by comprising the following steps of (1) the ANSYS FLUENT fluid dynamics analysis software; and (2) the physical simulation test bench of the floating plate wave suppression structure. The method has the advantages that, compared with a fixed wavesuppression plate, the floating plate wave suppression structure is creatively adopted to inhibit liquid in a tank of a liquid tank truck from fluctuating forcedly, the parameter of the floating platewave suppression structure and an influence factor of forced fluctuation of the liquid in the tank are associated to establish a liquid-in-tank floating plate wave suppression structure fluid dynamics model. The model is not involved in previous forced fluctuation of the liquid in the tank and the method is a development and creation in the research method.

The invention relates to a low temperature liquefaction vehicle fuel tanker operation box pipeline equipment plugging simulation test bench. The bench includes a pipeline, a first shut-off valve, a second shut-off valve, a shut-off valve-pipe elbow connection plugging device and a shut-off valve stem plugging device, the first shut-off valve and the second shut-off valve are installed in the pipeline, an elbow connection structure is formed between the first shut-off valve and the pipeline, the pipeline is connected with a liquid nitrogen bottle, the shut-off valve-pipe elbow connection plugging device is installed at the elbow connection of the first shut-off valve and the pipeline, and the shut-off valve stem plugging device is mounted on a valve stem of the second shut-off valve. The bench can conduct simulating experiment on the leakage plugging of the internal shut-off valve of a liquefied natural gas tank car operation box, a pipe elbow joint and the shut-off valve stem, and achieve the purpose of verifying the plugging effect.

The invention relates to the technical field of software testing, in particular to a high-availability testing method and system based on an FPGA and a DPDK, and the method comprises the steps: loading the FPGA through a preset FPGA service process; initializing the DPDK through a preset DPDK service process; enabling the FPGA service process to call a hardware traffic simulation command and carry out a hardware traffic simulation test based on the FPGA; enabling the FPGA service process to call a software protocol simulation command and perform a software protocol simulation test based on the DPDK; and after the software protocol simulation test is finished, enabling the DPDK service process to obtain an automatic restart instruction, and restarting the DPDK service process. The method and the device have the effects of improving the running efficiency of the simulation test and improving the usability of the software.

The invention discloses an offshore low-voltage ride-through detection method for a wind generating set. The method comprises the following steps of constructing a simulation testing machine system, and calculating corresponding current-limiting reactance and short-circuit reactance according to a to-be-detected voltage drop degree and the simulation testing machine system; simulating no-load operation of the testing machine system; simulating a test point power grid fault, and generating a required voltage drop according to a test standard; the output power of the simulation testing machine system being adjusted to be 10%-30% of the rated power, and a low-voltage ride-through test under a light load being carried out; and S5, adjusting the output power of the simulation testing machine system to 80-95% of the rated power, carrying out a low-voltage ride-through capability test under a heavy load, and recording test data. Based on different operation history and maintenance work of each unit of the wind power plant, similarity between the wind power plant unit and the actual wind power plant unit is calculated, the product identity is improved, an actual state of the actual wind power plant unit is greatly restored, and the method has practical significance and effect on field low voltage ride through detection.

The invention relates to the field of vehicle road simulation tests, and particularly relates to a complete vehicle road test room vehicle travelling channel device. The technical scheme is that two ends of a cross beam (1) are directly and fixedly installed on a pit wall (9), and two ends of a longitudinal beam (2) are installed on central sections of the pit wall (9) and the cross beam (1) respectively; platform modules are installed between the longitudinal beam (2) and the pit wall (9); an actuator (8) is installed on a ground pit; each platform module comprises a plurality of bearing units (3) which are parallel to each other and a connection component (4); and the connection component (4) is vertical with the bearing units (3) and is fixedly connected with the bearing units (3). The device provided by the invention has the beneficial effects that the cross beam and the longitudinal beam are adopted to construct a main bearing structure of the whole device; a safety channel is provided for a vehicle which is driven to a predetermined position of the test through the platform modules, and a problem that a heavy vehicle is not convenient for hoisting is solved; adjusting requirements of wheels spans and wheel bases of different vehicle are satisfied, and versatility is possessed; the structure is simple, installation and connection are convenient; and the device is suitable for various kinds of road simulation test rooms.

The invention relates to a heat exchanger design method and device, a storage medium and electronic equipment, and belongs to the technical field of heat exchanger design. The heat exchanger design method comprises the steps: obtaining application objects, including an indoor unit or an outdoor unit, of a target heat exchanger, and obtaining index parameters of the target heat exchanger; matchingand designing a reference heat exchanger from a preset heat exchanger database according to the application object and the index parameters; if the designed reference heat exchanger is matched, obtaining a first undetermined heat exchanger according to the index parameters, the designed reference heat exchanger and the preset corresponding relation between the shunt pipe diameter of the heat exchanger in the application object and the shunt optimal pipe length interval range; according to a preset simulation model, performing a simulation test on the first to-be-determined heat exchanger to obtain a first simulation heat exchange amount; and determining whether the first to-be-determined heat exchanger meets the design requirement or not according to the first simulation heat exchange amount, and performing corresponding processing. Through the heat exchanger design method, design efficiency of the heat exchanger can be improved.

The invention relates to the technical field of automobiles, in particular to a manufacturing method of a multi-link rear suspension, a multi-link rear suspension and a vehicle. The manufacturing method of a multi-link rear suspension comprises the following steps: according to the existing multi-link rear suspension, the braking simulation test of the multi-link rear suspension model is carried out, and the influence positions on the low-speed bending radius and the high-speed bending radius are found out in the multi-link rear suspension model, and the hard points are marked; the rigidity, stiffness or position of the parts marked with hard points are adjusted, and after the adjustment, the braking simulation test is carried out again to obtain the final optimized multi-link rear suspension model; the multi-link rear suspension is manufactured according to the optimized multi-link rear suspension model, and the multi-link rear suspension is manufactured through the manufacturing method of the multi-link rear suspension to solve the problems of poor turning follow-up performance, large turning radius and poor maneuverability when the vehicle is steered at low speed in the prior art; and vehicles are unstable when they turn the corner at high speed, thus being prone to the technical problems of rear tail flick phenomenon.

The invention provides a structure and load transfer integrated composite material four-point bending loading clamp and a using method, and relates to the technical field of composite material load and environment coupling service conditions. The clamp comprises a bottom plate, supports, a pressure head, long screws, springs, flat washers and nuts, wherein the two supports are in close fit with the bottom plate through screws, the two long screws are in close fit with the bottom plate through threads, the pressure head is in loose fit with the two long screws and can freely slide up and down, the long screws are sleeved with the springs, the springs are arranged above the pressing head, the flat washers are arranged at the top of the sides, which are away from the pressure head, of the springs, and the nuts transmit stable loads to the springs through the flat washers. Under the condition that other electronic equipment is not needed, accurate and quantitative four-point bending loads are provided for a composite material sample in an extreme environment, a simulation test that the material bears the long-time stable accurate four-point bending loads in different service environments is completed, and the four-point bending clamp is small in size, simple in structure, resistant to corrosion, not prone to damage, and capable of achieving certain loading precision. The loading using method is simple, the application range is wide, and testing conditions and steps can be automatically adjusted according to different samples and service environment requirements.

The invention particularly relates to an MIL simulation test method and system for an ADAS and a readable storage medium. The method comprises the following steps: constructing a simulation scene model, and obtaining simulation scene information; constructing a dynamic model for simulating self-vehicle response; the ADAS algorithm to be tested serves as a tested model to be connected with the simulation scene model and the dynamic model, and the simulation scene model and the dynamic model are connected to form a model interface closed loop; generating a driving control instruction, inputting the driving control instruction into the dynamic model, and generating corresponding vehicle state parameters; and inputting the simulation scene information and the whole vehicle state parameters into the tested model, generating a corresponding control request instruction through the tested model, and inputting the control request instruction into the dynamic model so as to realize the simulation test of the to-be-tested ADAS algorithm. The invention also correspondingly discloses a simulation test system and a readable storage medium. According to the MIL simulation test method, rapid verification can be carried out on the ADAS algorithm in the early stage of development, and rapid iteration test can be carried out after algorithm correction.

The invention provides a bus information extraction device of a rudder system in a loop and a semi-physical simulation method. The extraction device comprises an industrial personal computer, a 1553Bbus acquisition and optical fiber transmission interface board, a matched cable and an optical fiber; the industrial personal computer and the 1553B bus acquisition and optical fiber transmission interface board are jointly accessed into a CPCI/PCI bus; the 1553B bus acquisition and optical fiber transmission interface board is used for connecting the bus information extraction device into a 1553Bbus in a bus monitor mode through a matched cable; the 1553B bus is connected with a plurality of RT terminals including a rudder system and a guidance machine, and the 1553B bus acquisition and optical fiber transmission interface board is connected with the simulation system through an optical fiber. According to the invention, via the control of the FPGA transmission scheduling control module,the real-time rapid extraction and synchronous conversion of 1553B bus information can be realized and transmitted to an optical fiber network; the invention is small in time delay and stable in frame period, and solves the problems that the existing master-slave 1553B bus interface computer software is large in data acquisition and forwarding time delay and easily causes divergence of a simulation test.

A train dynamics real-time simulation platform comprises a plurality of simulation models, each simulation model comprises a simulation dynamics calculation unit and an interface unit, and the interface unit is used for communicating with a train control system, a monitoring system, a screen display and the like of a train to be tested. The dynamics calculation unit is used for calculating the acting force borne by each vehicle and dynamics performance indexes. The simulation model comprises a one-dimensional longitudinal dynamic model; a one-dimensional semi-physical longitudinal dynamic model; a multi-train longitudinal dynamics model; a longitudinal kinetic model based on adhesion; a three-dimensional semi-physical dynamic model; each dynamic real-time simulation model in the simulation platform makes simulation conforming to a line and a train structure as much as possible, the requirements of various simulation tests of the train for a dynamic simulation environment are met, and the universal effect is achieved.