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7793results about How to "Shorten the development cycle" patented technology

Flight simulation system with high instantaneity

The invention discloses a flight simulation system with high instantaneity, which is composed of two parts of a three-axis flight simulation turntable system and an external control computer system, wherein, the position and connection relation of the three-axis flight simulation turntable system and the external control computer system is as follows: the three-axis flight simulation turntable system is an actuating mechanism of a physical effect; and the external control computer system is a command sender of the physical effect; the external control computer system transmits the stimulated gesture result to the three-axis flight simulation turntable system through a reflected optical network; and the three-axis flight simulation turntable system carries out real-time gesture response. The five advantages of the flight simulation system of the invention are as follows: Matlab/Simulink is utilized to establish a stimulation model; a CPCI bus type is adopted in computer hardware, a fiber switch is utilized to build a reflection memory optical network; an interrupt response mechanism is adopted in the communication of the stimulation and the turntable system through the optical network, and AppSim stimulation software is used. The flight simulation system has practical value and wide application prospect in the technical fields of flight control and simulation.
Owner:BEIHANG UNIV

Interior noise analysis and prediction method of high speed train

The invention discloses an interior noise analysis and prediction method of a high speed train. The method comprises the following steps: establishing a train reconditioning train body model, a statistical energy analysis model of a body in white structure and an interior and exterior vocal cavity statistical energy analysis model, and carrying out simplification and subsystem division; obtaining the statistical energy analysis parameters of the train body structure and an interior vocal cavity model, and loading the statistical energy analysis parameters onto a train body structure model plate subsystem and a vocal cavity model subsystem; and obtaining exterior vocal excitation source energy borne on the train body, applying the exterior vocal excitation source energy onto the exterior vocal cavity statistical energy analysis model, causing the exterior vocal excitation source energy to reach an interior vocal cavity after the exterior vocal excitation source energy is attenuated by the sound insulation property of a structural plate in a body in white structure model so as to obtain structural noise energy radiated into the train by the reconditioning train body under the function of the two-line suspension force of a compartment, and then, carrying out interior noise analysis and prediction. The problem that the interior noise of the train is difficult in prediction and the problems of the upper limit boundedness of a frequency domain, complex calculation flow, incomplete motivation consideration in the traditional method are overcome, calculation efficiency and prediction accuracy are improved, and development and test cost is lowered.
Owner:ZHEJIANG UNIV

Quick prototype design method and platform for gas path fault diagnosis for aeroengine

The invention discloses a quick prototype design method for gas path fault diagnosis for an aeroengine. The quick prototype design method comprises the following steps of: building an adaptive model of the engine; designing a gas path fault diagnosis logic in the full service life of the aeroengine, and implementing abnormal monitoring and gas path performance on-line estimation; and designing a quick prototype design platform for gas path fault diagnosis for the engine, and checking abnormal monitoring and gas path performance on-line estimation functions of the platform. The adaptive model of the engine is built by a compound interference method; an engine on-board adaptive model is used for estimating performance parameters; an engine adaptive base line model is used for monitoring abnormities and performs off-line period updating; and the quick prototype design method is used for checking the engine gas path fault diagnosis logic. The invention also discloses a corresponding quick prototype design platform. The method and the platform are relatively high in capacity of monitoring abnormities and estimating the performance in the overall service life of the engine and have great significance for shortening the development period and reducing the test risk and the test cost.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

DSP (Digital Signal Processor)-based quad-rotor unmanned aerial vehicle autonomous hover control system and method

The invention discloses a DSP (Digital Signal Processor)-based quad-rotor unmanned aerial vehicle autonomous hover control system and method. The control system is provided with four screw propellers and control units which are arranged on four airfoils respectively; and each control unit is that a master control unit is connected to a ground computer through a wireless network, and a receiver is connected with a signal conversion module and a manual / automatic switching chip in sequence, transmits a received signal transmitted by a remote controller into the manual / automatic switching chip through the signal conversion module, is also connected with the manual / automatic switching chip through the master control unit and is used for transmitting the received signal to the manual / automatic switching chip through the master control unit for controlling driving units to drive direct current brushless motors on the four screw propellers to work. According to the method, kalman filtering processing is performed on sonar data to obtain accurate height data and driver control. According to the system and the method, the autonomous flight capacity of a micro quad-rotor unmanned aerial vehicle and the adaptability to the environment can be effectively enhanced, and the autonomous flight control under indoor environments and outdoor environments can be finished.
Owner:TIANJIN UNIV

Automatic testing method and system for mobile phone software

The present invention relates to the automatic test method and the system of mobile phone software. The method mainly includes five steps; firstly, the keystroke operation of a mobile phone is simulated by a program-controlled switching switch; secondly, communication between a base station and the mobile phone is simulated by a comprehensive mobile phone tester; thirdly, the images of the display screen of the mobile phone are real-timely collected by a camera; fourthly, according to a test task, an industrial control computer controls the unified operation of the program-controlled switching switch and the comprehensive mobile phone tester, collects information coming from the serial port of the mobile phone and the camera-collected real-time images of the display screen of the mobile phone and compares the collected real-time images with corresponding preset template images; fifthly, according to the information coming from the serial port of the mobile phone and the comparison result of the images, the industrial control computer judges the operation state of the mobile phone software. The present invention can accurately simulate the process in which a person operates a mobile phone, so the test result is more accurate. Moreover, the present invention can increase the test efficiency and ensure the comprehensive traversal of test cases.
Owner:LENOVO MOBILE COMM TECH

Universal digital television middleware system

The invention discloses a universal digital television middleware system, which comprises an interactive application presentation layer, a core service layer and a middleware adaptation layer. In order to realize intercommunication between application development and a platform system of each digital television manufacturer, digital television manufacturers successively launch digital television middleware products thereof. However, due to the absence of a uniform standard, the development difficulty is improved. In order to meet the requirements on digital television multi-hardware interfaces and customized products of the manufacturers and to shield the difference of the digital televisions, home gateway terminals and other products of the manufacturers on the hardware and operating systems, the universal digital television middleware system is provided. The system makes digital television application program-based development irrelevant to hardware lower layers and platforms, and can reduce the development difficulty of application programs and improve the efficiency by providing a universal API interface. Therefore, the application development becomes more simple and convenient, and the openness and portability of the products are stronger.
Owner:SHENZHEN IPANEL TECH LTD +1

Version control method, code testing method and system

Embodiments of the invention provide a version control method, a code testing method and system, and relate to the technical field of software development. According to the version control method, the code testing method and the system, a mistake in a newly submitted code can be discovered in time; a successful rate of full amount static code testing is improved; and a development period of a software product is shortened. A specific scheme provided by the emobodiments of the invention comprises: a version control system receiving an incremental data; creating an interim branch, and storing the incremental data in an interim code base, wherein the interim branch is a subordinate branch of a formal branch, and the data of the formal branch is stored in a formal code base; sending the data of the interim branch and an incremental identification to a continuous integrated system; receiving a first feedback message sent by the continuous integrated system, wherein the first feedback message is used for indicating that the data of the interim branch has passed an incremental static code test and an incremental construction test; and combing the incremental data twith the data of the formal branch. According to the invention, the version control method, the code testing method and the system are used for software development.
Owner:HISENSE VISUAL TECH CO LTD

Novel modular bionic underwater robot based on full-flexible pectoral fins

The invention discloses a novel modular bionic underwater robot based on full-flexible pectoral fins. A hydrodynamic module of eagle ray pectoral fins is analyzed, and motion of the pectoral fins is decomposed into vertical bending flapping in the vertical body longitudinal axis direction and twisting motion taking the vertical body longitudinal axis direction as the axis. The whole robot comprises a sectioned main body, a left flexible pectoral fin module, a right flexible pectoral fin module and a tail fin module, and a group module is formed by connecting fin connecting parts; the left and right flexible pectoral fin modules are identical in structure and are in mirror symmetry; a pectoral fin framework adopts a structure similar to that of a plane rib, a symmetrical airfoil is taken as the basic shape, and the pectoral fin modules with streamline sections are spliced through serial connection of straight pectoral fin trunk bones and steel wires. A large steering engine and a small steering engine are arranged at the root and the tip of each pectoral fin to control vertical flapping and twisting motion of each pectoral fin. Through adjustment of motion amplitude, motion frequency and phase difference of the two steering engines of each pectoral fin, different pectoral fin motion postures can be realized, and fish body motion can be finished better.
Owner:BEIHANG UNIV
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