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69results about How to "Long development cycle" patented technology

In-the-loop simulation test system for electronic parking brake system

The invention discloses an in-the-loop simulation test system for an electronic parking brake system, which comprises a computer, a data acquisition card, a high-speed CAN card, a hardware interface circuit, a pressure sensor, an electronic parking brake system controller and an electronic parking brake actuating mechanism. Various kinds of information are input by the computer, test software simulates actual automotive parameters according to the input parameters, the information is sent to the electronic parking system controller through the high-speed CAN card and the data acquisition card, the electronic parking brake system controller controls the actions of the actuating mechanism, an indicator lamp and an alarm and feeds the actions back to the computer through an actuating mechanism test system and the data acquisition card, and thus, a closed-loop test system is formed. The in-the-loop simulation test system for the electronic parking brake system has the advantages that: the analog simulation efficiency is high; the adjustment period of the EPB operation environment is short, simple and low in cost; the program parameters can be changed at any time according to the different vehicle models; and the application range is wide; and the development cycle is short and the unnecessary resource waste is reduced.
Owner:WUHU BETHEL AUTOMOTIVE SAFETY SYST

CFD (computational fluid dynamics) based method for computing equivalent length of valve

The invention relates to a CFD (computational fluid dynamics) based method for computing equivalent length of a valve. The method includes the steps: establishing a three-dimensional assembly model of the valve, after an extension section is added to an entry and exit position of the valve model, importing the model into CFD software, working out pressure values of multiple working conditions by analog calculation of the CFD software and computing corresponding pressure differences; according to the pressure differences, respectively computing multiple flow coefficient values through a formula, and then computing an average flow coefficient value; computing an equivalent length value of the valve through a formula. Flow performance data of the valve are obtained by the aid of CFD technological analogue simulation, only drawings are needed to be used for completion in a virtual prototype phase in the initial stage of development, and the situations that manpower and material resources are wasted and development cycle is prolonged due to the fact that the valve must be manufactured and subjected to test measurement in order to detect flow performance of the valve in the prior art are avoided, so that development efficiency is greatly improved and cost is saved by the method.
Owner:NEWAY VALVE SUZHOU

Low-pressure natural gas recovering system for offshore gas field

The invention discloses a low-pressure natural gas recovering system for an offshore gas field. In the low-pressure natural gas recovering system for the offshore gas field, a gas phase outlet of a high-pressure oil-gas-water separator is communicated with a dry gas compressor, an oil phase outlet of the high-pressure oil-gas-water separator is communicated with a low-pressure oil-gas-water separator, a gas phase outlet of the low-pressure oil-gas-water separator is respectively communicated with a fuel system and a wet gas compressor, and an oil phase outlet of the low-pressure oil-gas-water separator is communicated with a condensate oil buffer tank; a material flow from a low-pressure well mouth of the gas field at sea is input into the low-pressure oil-gas-water separator or the condensate oil buffer tank; the gas phase outlet of the condensate oil buffer tank is sequentially communicated with a low-pressure gas cooler, a low-pressure gas hydrocyclone, a low-pressure gas booster compressor and a low-pressure gas aftercooler. The low-pressure natural gas recovering system for the offshore gas field is mainly used for recovering and using natural gas, which is low in pressure or micro in positive pressure or small in flow quantity, in the gas filed at sea, so that the emptying quantity of the gas field is reduced, and energy conservation and emission reduction are achieved.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Interface development method and device

The invention provides an interface development method and device. The method comprises the following steps: adopting a browser engine with C++ encapsulating an open source and obtaining an interfaceengine core module; using the interface engine core module to independently generate page rendering and script running in a graphical user interface process; storing the page rendering and script running in the page engine process; encapsulating the interface engine core module to obtain an interface engine tool control; carrying out page rendering and scrip running in the page engine process, andperforming asynchronous communication on the page engine process and the interface engine tool control so as to obtain an interface separate from the business logic. The method uses page rendering and script running to carry out the front-end technology development interface; C++ develops the business logic; the interface is completely separated from the business logic; the page rendering and script running have a large number of free open source components, which greatly improves the interface development efficiency and alleviates the problems of long development cycle for interface development, difficulty for separating the interface and the business logic and difficulty for maintenance in the later stage in the existing method.
Owner:GUANGDONG POWER GRID CO LTD +1

Vehicle path tracking prediction controller and FPGA heterogeneous acceleration implementation method

The invention discloses a vehicle path tracking prediction controller and an FPGA heterogeneous acceleration implementation method, and belongs to the technical field of control. Vehicle system characteristics are learned by using a support vector machine, then a vehicle support vector machine model is established, the control for vehicle path tracking is realized based on model prediction control, and finally an FPGA heterogeneous acceleration method is carried out on the controller. Support vector machine model training is carried out on three selected vehicle state quantities respectively,each model training sample contains six inputs and one output, and the vehicle path tracking prediction controller is designed. A controlled design oriented vehicle model which is simple in structureand contains all information of a vehicle system can be obtained effectively, so that the controller meets all working condition requirements of the system; moreover, the computation speed of the vehicle path tracking prediction controller is improved, and the real-time requirement and low-cost computation and storage requirements of the system are met; and moreover, a control algorithm is convenient to transplant between software and hardware, so that the difficulty of system development is reduced greatly.
Owner:JILIN UNIV

Superconductive cavity tuning control system and method based on PLC and touch screen

The invention discloses a superconductive cavity tuning control system and method based on a PLC and a touch screen. The system comprises a PLC substrate. A PLC power module, a CPU module, a position control module, a first simulation input module, a second simulation input module, a simulation output module and a TTL input module are arranged on the PLC substrate. An incident power radio frequency signal lead out end of a superconductive cavity and a radio frequency signal lead out end coupled in the superconductive cavity are connected with two input ends of a phase discriminator. The output end of the phase discriminator is connected with the first simulation input module and the input end of the TTL input module. The second simulation input module and the output end of a displacement sensor are connected with a simulation voltage input end of a piezoelectric ceramic high-voltage power supply. The position control module is connected with a pulse input end of the stepper motor driver. The simulation output module is connected with a simulation input end of the piezoelectric ceramic high-voltage power supply. The CPU module is connected with the touch screen unit. According to the invention, frequency of the superconductive cavity can be automatically searched, captured and locked.
Owner:INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI

Establishment method for definite reliability degradation equation of aerospace mechanism product

The invention provides an establishment method for a definite reliability degradation equation of an aerospace mechanism product. The method comprises the steps of building a corresponding margin equation according to key performance parameters of the product, and analyzing a fault mode and mechanism; judging whether the relationship between the output result of a fault physical model and the performance parameters is an abrupt change type or a continuous type, if the relationship is the abrupt change type, judging whether the fault physical model is a vibration fatigue fault physical model or a thermal fatigue fault physical model, if the fault physical model is a vibration fatigue fault physical model, establishing a first degradation equation, and otherwise, establishing a second degradation equation; if the fault physical model is a continuous type, judging whether the fault physical model is a wear fault physical model or a thermal deformation fault physical model, if the fault physical model is a wear fault physical model, establishing a third degradation equation, and otherwise, establishing a fourth degradation equation; and substituting the degradation equation into the margin equation, if the result is positive, indicating that the product is reliable. According to the invention, the reliability of the aerospace mechanism product is researched by using a definite reliability theory, the reliability evaluation of the aerospace mechanism product can be effectively solved, and the development period is shortened.
Owner:BEIHANG UNIV
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