679 results about "Bench test" patented technology

A quality assurance benchmark system tests a target executable application under load stress conditions over an extended period of time. The system has user-controlled parameters to benchmark performance, scalability, and regression testing before deploying the application to customers. The system includes a display processor and a test unit. The display processor generates data representing a display image enabling a user to select: input parameters to be provided to the target executable application, and output data items to be received from the target executable application and associated expected range values of the data items. The test unit provides multiple concurrently operating executable procedures for interfacing with the target executable application to provide the input parameters to the target executable application, and to determine whether data items received from the target executable application are within corresponding associated expected range values of the data items.

An automated method for testing audio signal quality of cell phone transmissions provides a Mean Opinion Score (MOS) output using inexpensive test components. The test system uses a server computer to eliminate the need for expensive faders used in a bench test system. The server computer manipulates data packets from the reference media file to simulate impairments, including losses, errors, noise and jitter, at a much lower cost than using actual faders. Transmission through two separate radio access networks RANs is provided to simulate two parties communicating using separate mobile devices (an end-to-end test solution) with a single cell phone.

The invention discloses an automatic transmission loading spectrum collecting and compiling method used for indoor bench test. The method comprises the following steps of 1, acquiring a real vehicle working condition signal; 2, inputting the asynchronously acquired signal into a data collector, converting an analog signal into a digital signal and then inputting the digital signal to a computer; 3, obtaining an engine torque signal by dividing the sum of torque values output by a transmission by the transmission ratio of the transmission; 4, carrying out data preprocessing on the engine torque signal by means of a rain-flow method; 5, carrying out extrapolating on the time domain of a loading spectrum; 6, dividing toques under a positive dragging working condition and an inverse dragging working condition into eight grades respectively; 7, calculating the rotating frequency of a flywheel and the occurrence frequency of a gear of the engine corresponding to each loading grade; 8, performing a program loading test method; 9, performing a random loading test method. The method effectively solves the problem that the indoor bench test is seriously deviated from the actual driving working condition of a vehicle due to the fact that compiling of the automatic transmission indoor bench test has no basis, and reasonably represents the loading working condition of the transmission on an indoor bench.

The invention discloses a system and method for monitoring loads on tires in real time in the automobile driving process. The method is characterized by including the steps of firstly, calibrating mapping relations of the loads on the tires of an automobile, pressure on the tires, temperatures of the tires and perpendicular deformation amounts of rubber tire bodies of the tires through bench tests; secondly, evaluating the loads on the tires in real time in the automobile driving process through an automobile velocity test device, a tire pressure monitoring device, a tire velocity sensor and the like. The method is mature in concept, the designed monitoring device has high test accuracy, and the vehicle model application range is wide.

The invention provides an operating system fault tolerance testing system and an operating system fault tolerance testing method based on fault injection. The testing system mainly comprises a data processor, an integrated fault injection platform, a reference testing operation controller, an interceptor, a monitor and a target machine with an operating system to be tested and a database. By using the testing system and the testing method, under the situation that a fault exists, a classified, reusable and comprehensive method can be provided to comprehensive check and measure the behavior of the operating system, the testing goal is explicit, the testing process is clear and comprehensive, the designed types of faults cover analog hardware faults, operating system faults and system component faults, the weak point of the system can be found under the situation that the fault exists, the aspects of the system which are required to be adjusted and improved to enhance fault tolerance can be pointed out, and even the structure of the system can be adjusted to achieve a proper fault tolerance level.

The invention relates to a quick wear test device of an engine valve seat ring. Evaluation of a wear life of the existing engine valve and seat ring is only completed by an overall reliability bench test at present, the period is long, and the expense is high. The quick wear test device is characterized in that a motor is arranged on a stander, wherein the motor is used for driving a cam shaft, the end of the motor is provided with a photoelectric coder, the top end of a valve rod is contacted with the cam shaft, and the bottom end of the valve rod stretches into the stander and provided with a valve body; and a seat ring which is matched with the valve body is arranged inside the stander, and the valve rod outside the stander is also provided with a valve spring. The bottom inside of the stander is provided with a hydraulic oil cylinder, and the position of the hydraulic oil cylinder is opposite to the valve body. The periphery of the valve seat ring is provided with a sensing heater, and the valve seat ring is also provided with a temperature sensor. The quick wear test device is used for researching a reliability design technology of an engine air distribution mechanism component and has important significance on improving the independence research and development capacity of air distribution mechanism component manufacturers in China and improving the overall design reliability of an engine.

The invention relates to a method for checking vibration fault of a fan blade of an aerial engine. The method comprises the following steps of: measuring torsion vibration of the aerial engine by utilizing a speed measuring fluted disc, an eddy current displacement sensor, a signal conditioner, a data acquisition card and a computer, and carrying out real-time monitoring on the torsion vibration under the conditions of aerial engine ground bench test drive, vehicle-mounted ground test drive and maneuver flight. The reliability and maintenance of the engine are improved by detecting the fan blade vibration characteristic frequency contained in a rotor torsion vibration signal, judging an aeroelectric state of the fan blade and diagnosing the vibration fault of the blade of the aerial engine. According to the method for checking the vibration fault of the fan blade of the aerial engine, disclosed by the invention, a torsion vibration signal is measured directly from an aerial engine shaft system so that the fault information of vibration can be clearly reflected, the elements of the torsion vibration signal obtained through measurement are simple and are convenient to analyze, the engineering limitation of a current conventional measurement method is overcome, and the real-time monitoring of the vibration of the fan blade is ensured to be carried out under various conditions, such as the engine ground bench test drive, the vehicle-mounted ground test drive, the maneuver flight and the like.

The invention relates to mixed power electric automobile power assembly bench test device. Front, back, left, and right frames are formed bench according to the mounting means of engine, torque sensor, electric machine, gear box and the sensor fixing position at the crank shaft. Power assembly is set at the bench. Power measuring machine is connected with the power output end of the gear box. Torque sensor is set between the engine and the electric machine or power measuring machine. The connected power assembly, torque sensor, and power measuring machine are connected with each controller unit and related wiring harness to constructer CAN network, adjust system communicating, verify reliability and system function for engine, electric machine, battery, HCU multi energy sources controller, BMS battery management unit, MCU electric machine controller, EMS engine controller etc.

A method for counting out system resistance of vehicle free position running in road test and platform test sets up two curve equations of vehicle road test and platform test so system equivalent resistance coefficient and system resistance of vehicle at each speed point in road test can be obtained according to vehicle type and reference mass and furthermore equivalent inertia of free position chassis driving series on vehicle in platform test can be confirmed , thus system resistance at each speed point in platform test can be detected out by only utilizing once of free position running .

The invention provides a gear lubricant composite for manual transmissions of the light cars, comprising (A) at least one type of refining mineral oil with high viscosity index, or polyolefin synthesis oil, or ester lubricants, or a free composite of the above components, (B) at least one type of viscosity index improver, (C) at least one type of pour point depressant, (D) at least one type of extreme pressure additive with sulfurs, (E) at least one type of anti-wear additive with phosphorus, (F) at least one type of wear, oxygen, and corrosion-preventing multifunctional additive with phosphorus, (G) at least one type of anti-rusting additive, and (H) at least one type of friction modifier. The lubricant composite has excellent performance of high and low temperature, which can meet the requirements of gear oil with a viscosity grade of 75W/90. Moreover, passing the full-size gear bench tests as CRCL-42, L-37, L-33, L-60, and L-60-1 as well as cycle bench tests for the manual transmissions of the light cars, the gear lubricant composite can meet lubrication requirements of the manual transmissions of the light top-grade cars.

The invention relates to a combination property detection device of a hydraulic pressure ABS pressure regulator assembly, which mainly comprises an industrial computer (10), a hydraulic pressure ABS electromagnetic valve drive circuit (20), the detected hydraulic pressure ABS pressure regulator assembly (30), a pressure generation device (40), a data collecting system (50), a braking system (60) and an exhaust system (70). The detection device of the hydraulic pressure ABS pressure regulator assembly can detect the characteristic parameters of the pressure regulator assembly and evaluate the result of detection according to a pressure model. The detection device leads the detection of the pressure regulator assembly to be transferred to indoor bench test from outdoor road test, thus improving the economy and safety performance of the detection greatly and being used as the detection equipment of the hydraulic pressure ABS pressure regulator assembly manufacturers.

Disclosed is an aerodynamic stability predicting and estimating method of an aerial engine under a counter thrust state. The method comprises the following steps of, firstly, performing aeroplane/engine integrated counter thrust air turbulence field fully-three-dimensional numerical simulation under the counter thrust state and obtaining the distortion maps and the distortion indexes of the inlet flow field of the engine under the counter thrust state; under the premise of obtaining the distortion indexes of the inlet flow field of the engine under different skating speeds of the aeroplane in the counter thrust state, performing integral stability computing analysis on influence of inlet flow field distortion on the aerodynamic stability of the engine in the counter thrust state; thirdly, taking the engine inlet flow field distortion maps obtained through three-dimensional flow field computing as the target to design an inlet flow field distortion generator used for aerial engine bench tests; fourthly, performing engine bench tests through the engine inlet flow field distortion generator, during the tests, starting a counter thrust device to measure the working state of the engine in real time and further to estimate the engine aerodynamic stability in the counter thrust state when inlet flow field distortion exists.

The invention relates to a variable damping absorber. In the variable damping absorber, circular holes with specified numbers, positions and sizes are drilled on the working cylinder wall of an ordinary dual-cylindrical hydraulic absorber for the conventional passive suspension and are separated from environment outside the working cylinder, and the area of a channel through which oil in the absorber flows in the working process under different working conditions is changed to fulfill the aim of changing the damping force of recover stroke and compression stroke. Bench tests and loading road tests prove that the absorber has the excellent performance and stable damping characteristic. According to the condition of the machined holes, the absorber can produce 2 to 5 levels of damping force, and once the absorber is designed, the damping force can be provided automatically according to the vibrating amplitude of vehicle bodies without arranging a damp regulating mechanism and a control mechanism additionally, so the absorber has a simple structure and low cost, is easy to manufacture, and has the high practical value. The variable damping absorber can be applied to semiactive suspension systems, seats of drivers and vibration isolation and vibration attenuation of driving cabs in various vehicles.

The embodiment of the invention provides an engine control method and a controller used for a bench test and a bench test system. The method includes the steps that all parameters when an engine works are obtained; and at least one of the air-fuel ratio, the ignition advance angle and operation of the engine is intelligently controlled according to the obtained parameters. The air-fuel ratio of the engine is intelligently controlled according to the obtained air-fuel ratio and the obtained exhaust temperature. The ignition advance angle of the engine is intelligently controlled according to the obtained combustion signal. The combustion signal includes at least one of the cylinder pressure peak value, the heat release 50% crank angle and the maximum cylinder pressure crank angle. The operation of the engine is intelligently controlled according to the obtained operation signal. The operation signal includes at least one of the engine torque, the engine rotating speed, the pressurization pressure, the turbine rotating speed and the engine power. By means of the engine control method and the controller used for the bench test and the bench test system, accurate and safe control over the engine can be achieved without calibration or online control parameter regulation.

The invention discloses a device and method for detecting brake performance of an automobile. The device comprises an inertia mechanism, a driving mechanism, a first rolling mechanism, a first revolving speed detecting unit and a second revolving speed detecting unit, wherein the driving mechanism drives the inertia mechanism to rotate, the first rolling mechanism is contacted with car wheels in a friction mode, the first rolling mechanism is connected with the inertia mechanism through a first synchronous transmission mechanism, the first revolving speed detecting unit is used for detecting the revolving speed of the first rolling mechanism, and the second revolving speed detecting unit is used for detecting the revolving speed of the car wheels. The device and the method for detecting the brake performance of the automobile can simulate braking force of the road surface on the automobile, obtains brake performance parameters of the automobile through a bench test and improves the precision of a simulating test of driving of the automobile on the road surface. The device can be used for conducting a brake performance study on a single wheel and the whole automobile, and also can be used for conducting a testing study on the dynamic quality and driving stability of the automobile. The device for detecting the brake performance of the automobile has the advantages of being low in cost, easy to produce, capable of being conveniently used by a laboratory, and beneficial to operation of operating personnel.

The invention discloses a method for electrically simulating mechanical inertia. The method comprises the steps of: estimating an angular acceleration by applying Kalman filtering based on a measured angular speed; performing delay compensation on the estimated angular acceleration to obtain an exact real-time angular acceleration; and forming an electric inertia torque given value by the exact real-time angular acceleration based on the value of the simulated inertia, transmitting the electric inertia torque given value to a frequency converter, and controlling an electromagnetic torque of a loading motor by the frequency converter to realize electric simulation of the mechanical inertia. Through the way, the method for electrically simulating the mechanical inertia, provided by the invention, has the advantages of satisfying requirements of a speed changer test to the inertia simulation, simplifying mechanical structure of a speed changer test-bed, improving inertia simulation precision, realizing stepless adjustment of the inertia, removing level difference existing during the simulation of the inertia of a mechanical flywheel, guaranteeing credibility of the test, improving automatic degree of the speed changer test-bed and getting wide attention from car bench test equipment manufacturers.

A method of operating a semiconductor memory device includes applying a program pulse at least once to each of a plurality of pages; performing a pre-read operation on a reference page among the plurality of pages through an initial test voltage; repeating the pre-read operation by controlling the initial test voltage until a result of the pre-read operation is a pass; setting the initial test voltage of when the result of the pre-read operation is the pass as a reference test voltage; and detecting a defective page among the plurality of pages by performing read operations on the plurality of pages through the reference test voltage.

The invention discloses an external control variable displacement compressor torque compensating method and system. The method includes enabling an electronic injection EMS to collect an engine revolution signal to determine the current engine revolution value, connecting an air conditioner electronic control unit (ECU) through controller area network (CAN) communication to determine current control current of an external control variable displacement compressor and refrigerant pressure value, utilizing an internal MAP to obtain current torque value through a table look up method, and achieving real-time compensation of the whole automobile torque by adjusting parameters like oil injection quantity according to torque value required to be compensated. By means of a whole automobile and bench test method, the refrigerant pressure, control current of the external control variable displacement compressor, the engine revolution and the compressor torque are correlated, real-time compensation is conducted on the external control variable displacement compressor torque of a whole automobile, the external control variable displacement compressor torque compensation accuracy can be improved, and power output of the whole automobile and driving and taking comfort can be ensured.

The invention relates to steel for 13-dwt vehicle axle housing and a production method thereof. The steel comprises the following chemical components by weight: 0.04%-0.08% of C, 0.10%-0.60% of Si, 1.3%-1.45% of Mn, not more than 0.025% of P, not more than 0.08% of S, 0.01%-0.06% of Al, 0.04%-0.06% of Nb, 0.03%-0.05% of Ti, and the balance of Fe and inevitable impurities; The preparation method comprises the following steps: converter smelting; vacuum treatment; continuous casting; casting blank heating; rough rolling; finish rolling by a 7 frame; cooling with laminar flow; coiling. Because of the low carbon content of the steel of the invention, the steel has excellent stamping performance and welding performance, has a stable dimension after cold forming, and completely meets the requirements for manufacturing and application of 13-dwt vehicle axle housing. Through bench tests of the manufactured 13-dwt vehicle axle housing assembly, the product has excellent vertical bending fatigue life, vertical bending rigidity, and vertical bending static strength, and completely meets the requirements of users.

The invention discloses an aligning control method and an aligning control device for an electric power-assisted steering device. The method comprises the following steps: establishing a mathematicalmodel of the electric power-assisted steering device; testing the steering work under different road resistance through a bench test, tabling results, and storing a table in an electronic control unit; determining to enter an aligning control condition; estimating the driving road surface resistance torque of a vehicle; calculating the energy required to be provided by a power-assisting motor whenthe steering wheel of the vehicle is to be aligned according to the road surface resistance moment, and calculating to obtain the assistant aligning torque required to be provided by the power-assisting motor; finally, obtaining a vehicle speed related coefficient and a steering wheel related coefficient to modify the assistant aligning torque according to vehicle speed information and aligning torque information. According to the aligning control method and the aligning control device for the electric power-assisted steering device, the aligning performance of the electric power-assisted steering device is improved on the premise of not influencing the operating hand feel of a driver and not increasing the required sensors.

The invention relates to a WiFi signal test method and system. The method comprises setting a plurality of different-class test software, which comprises reference test software, positive deviation software and a negative deviation software, in advance; connecting a wireless network card with a to-be-tested WiFi product through the test software; controlling, through the test software, the to-be-tested WiFi product to send power to the wireless network card to perform a sending performance test, and controlling the to-be-tested WiFi product to receive the power sent by the wireless network card to perform a receiving performance test; and, when a deviation between a power value sent by the to-be-tested WiFi product and a power value received by the wireless network card is within a predetermined first threshold, and when a deviation between a power value received by the to-be-tested WiFi product and a power value sent by the wireless network card is within the predetermined first threshold, the to-be-tested WiFi product is qualified, otherwise the to-be-tested WiFi product is not qualified. The WiFi signal test method and system do not need to use an expensive WiFi signal test instrument to perform the test, the expense of testing is reduced, and cost is saved.