1055results about "Vehicle suspension/damping testing" patented technology

A control system is operable to selectably activate shock damping devices associated with a bicycle so as to eliminate bobbing encountered under extreme pedaling conditions. The system includes a crank axle torque detector which operates to detect a level of torque applied to a crank axle and provide a control signal corresponding to the level of torque. A shock damping device is coupled to the frame of the cycle, and functions to absorb and dampen mechanical shocks communicated to the frame. The shock damping device includes an activator for controlling its damping function. The activator is operable to receive the control signal from the crank axle torque detector and control the shock damping device in response thereto. The control signal may be an electrical or a mechanical signal.

A health monitoring system is provided for a vehicle with an identity configured to travel on a surface. The system includes a body positioned on the surface and configured to stimulate a dynamic response from the vehicle as the vehicle travels over the body; a response sensor associated with the body and configured to measure the dynamic response from the vehicle; and an identification sensor associated with the body and configured to collect data corresponding to the identity of the vehicle.

A method, system, and device for optimizing a vehicle's suspension includes: mounting at least one modified passive shock with a plurality of sensors onto a vehicle, where the shock is adjustable for a plurality of damping forces; connecting the shock to an electronic control unit being for adjusting the damping forces of the shock and reading the plurality of sensors; and running the vehicle through a plurality of test cycles where the electronic control unit reading the plurality of sensors during each test cycle and adjusting the shock to a different damping force between each test cycle, where the adjusted shock emulating the damping forces of multiple standard passive shocks.

An electronically adjustable shock absorber, and a system, method, and algorithm for developing a vehicle suspension. The shock absorber has damping characteristics that can be adjusted electronically to match a desired set of damping characteristics. The test method includes closed loop control of the electronically adjustable shock to achieve user-provided damping characteristics. The characteristics can be selected from a graphical user interface to simulate different internal flow passages of a shock absorber. Some embodiments make possible the simulated testing of different hardware embodiments, without the need to make the actual shock absorbers and without the need interrupt the vehicle suspension testing for multiple shock absorber installations.

A dynamic vehicle tester providing integrated testing and simulation for determining characteristics of a unit under test. Changes occurred on the unit under test are dynamically obtained, considered and incorporated in generating test conditions to be applied to the unit under test. In particular, testing of a vehicle suspension system may be accomplished.

Methods and apparatus for diagnosing the condition of a vehicle. Some embodiments include providing an input to a vehicle suspension similar to an impact, and then measuring the response of the vehicle as it drives over an instrumented member. The motion of the instrumented member is recorded and corrected, and in some embodiments a fault index is calculated. The fault index can be displayed to a user to indicate a maintenance condition of the vehicles, such as a worn or broken component.

Provided is a vehicle testing apparatus which involves load variation and alignment variation, for analyzing a maneuverability of a vehicle on flat belts or rollers adapted to be rotated together with wheels of the vehicle, and in particular, maneuver variation. Load variation caused by an inertia force and a gravitational force which are produced during actual running of the vehicle, and tire alignment variation caused by suspension strokes, are forcibly reproduced by forces produced by actuators or a gravitational force, thereby it is possible to evaluate a maneuverability of the vehicle in a condition substantially the same as that during actual running of the vehicle.

An electronically adjustable shock absorber, and a system, method, and algorithm for developing a vehicle suspension. The shock absorber has damping characteristics that can be adjusted electronically to match a desired set of damping characteristics. The test method includes closed loop control of the electronically adjustable shock to achieve user-provided damping characteristics. The characteristics can be selected from a graphical user interface to simulate different internal flow passages of a shock absorber. Some embodiments make possible the simulated testing of different hardware embodiments, without the need to make the actual shock absorbers and without the need interrupt the vehicle suspension testing for multiple shock absorber installations.

Measured values obtained from a running test of an object to be tested and a module on a test bench such as a flat belt type chassis dynamo, and computation based upon numerical models of components other than the object to be tested and the module, are related to each other so as to reproduce a condition near to an actual running condition, for the object to be tested and the module so as to precisely analyze how the object to be tested and the module affects upon the motion of the overall vehicle during actual running of the vehicle. Thus it is possible to evaluate dynamic characteristics of respective vehicle components and a module which relate to the maneuvering performance of the vehicle, on a test bench in a condition in which a load variation and an alignment variation are taken into consideration.

A system for use in monitoring, measuring, computing and displaying the volumes of internal gas within a telescopic aircraft landing gear strut. Pressure sensors and temperature sensors and motion sensors are mounted in relation to each of the landing gear struts to monitor, measure and record the impact movement and rates of internal landing gear strut fluids; experienced by landing gear struts, as the aircraft landing gear initially come into contact with the ground. The computer of this system measures the compression experienced by each landing gear strut and determines if the landing gear strut is improperly serviced with either excess or deficient volumes of nitrogen gas. Additional features include automating the inspections required to aircraft landing gear, prior to flight, during flight and during landing events.

A method, system, and device for optimizing a vehicle's suspension includes: mounting at least one modified passive shock with a plurality of sensors onto a vehicle, where the shock is adjustable for a plurality of damping forces; connecting the shock to an electronic control unit being for adjusting the damping forces of the shock and reading the plurality of sensors; and running the vehicle through a plurality of test cycles where the electronic control unit reading the plurality of sensors during each test cycle and adjusting the shock to a different damping force between each test cycle, where the adjusted shock emulating the damping forces of multiple standard passive shocks.

The invention discloses a multiple-degree-of-freedom suspension K&C (kinematics & compliance) property test platform, which mainly comprises a support system, a loading system, a measuring system, a movement platform system and a control system, wherein the support system is used for supporting a vehicle to be measured and the loading system, six electric cylinders in the loading system are used for driving the movement platform system to realize the six-degree-of-freedom movement, a left pier and a right pier in the loading system are slidingly connected above the movement platform system, a circular disc motor in the left pier and a circular disc motor in the right pier respectively drive a pier table to rotate, the measuring system is used for measuring the displacements and the applied forces of wheels of the vehicle to be measured, and the control system is used for collecting signals measured by the measuring system, and driving the loading system to load the vehicle to be measured. The multiple-degree-of-freedom suspension K&C property test platform has the advantages that the particular multiple-degree-of-freedom loading type is adopted, the lateral inclining angle and the longitudinal inclining angle of a real road surface can be completely simulated in the test process, the rotation inertia of the whole vehicle or component parts can be measured by little modification, the structure is simple, the measuring range is wide, and the application prospect is better.

The different advantageous embodiments provide an apparatus comprising a number of landing gear components for a vehicle, a number of systems, and a number of processor units. The number of systems is configured to generate data about the number of landing gear components and the vehicle. The number of processor units is configured to monitor the data and manage health of the number of landing gear components.

A health monitoring system is provided for a vehicle with an identity configured to travel on a surface. The system includes a body positioned on the surface and configured to stimulate a dynamic response from the vehicle as the vehicle travels over the body; a response sensor associated with the body and configured to measure the dynamic response from the vehicle; and an identification sensor associated with the body and configured to collect data corresponding to the identity of the vehicle.

A system and method for providing a vehicle roll stability indicator that estimates the propensity for vehicle rollover. The system determines vehicle kinematics from vehicle sensors, such as roll rate, yaw rate, lateral acceleration, vehicle speed, etc. From these kinematic values, the system estimates a roll angle of the vehicle and a bank angle of the vehicle. From the estimated bank angle, the system provides a corrected roll angle. From the corrected roll angle, the system determines a roll energy of the vehicle and a roll energy rate of the vehicle. From the roll energy and the roll energy rate, the system calculates a roll stability indicator that defines the potential that the vehicle will tip-up or roll over. From the roll stability indicator, vehicle stability control systems can take suitable action.

The invention discloses a vehicle shock-absorber double-acting endurance test apparatus, comprising a hydraulic servo actuator, a hydraulic servo controller and a test bracket. The hydraulic servo controller comprises a system controlling a waveform formed by folding two sine waves with the different frequencies and swings; the hydraulic servo controller is connected with the hydraulic servo actuator; the test bracket comprises a gantry and the hydraulic servo actuator is fixed on a beam of the gantry; and the hydraulic cylinder of the hydraulic servo actuator is arranged downward and a power output shaft is fixed with the upper end of the shock-absorber to be tested and the lower end of the tested shock-absorber is fixed under the gantry. The invention can respectively brings an action with different frequencies and swings to the upper and lower ends of the shock-absorber to respectively simulate the movement of wheels and vehicle body; and the control precision is high and the noise is lower.

A leak detector apparatus for a pressurized cylinder having a cylinder of a radius (r) with a slidable piston in the cylinder with a gas filled chamber positioned between a cylinder end and the piston face. The length (L) of the chamber is calculated according to load changes on the piston where the volume (Vc) of the chamber changes. The pressure and temperature of the chamber are measured as well as the length. These values are inputted to a processor to solve the ideal gas law equation PV=nRT where a change in n for a change in length indicates a leak.

The invention discloses a rigid-body mode integration test method for an automobile power assembly and a suspension system. By adopting a constant-velocity amplitude sinusoidal scanning excitation signal as an excitation source of a four-channel vibration table, the method not only can test the translation rigid body modes along X, Y and Z directions and the rotation rigid body modes around the X, Y and Z directions of the power assembly relatively well, but also can test the homonymous jump mode and incongruous jump mode of the suspension system relatively well.

The invention discloses a vehicle quarter simulated suspension system and a damper characteristic composite test bench, consisting of two parts of a whole frame-based suspension system test bench and a damper characteristic test bench which are comprised relatively a mechanical bench part, an electric excitation part and a computer control part. The invention is capable of performing characteristic test, ordinary passive and semi-active quarter suspension characteristic test of various dampers, and development test of semi-active suspension controller. Using frame structure and vertical straight ball slide, and with simple and stable bench structure, little mechanical friction and convenience for adjusting suspension parameter, it is capable of using various suspension parameter in computer simulating calculation in the test, which enables good connection between numerical simulation and test validation, thereby improving the effect of the suspension performance test and semi-active suspension controller development test.

A method for detecting demand fault of motor vehicle includes setting sound transducer near to key parts of motor vehicle operation, comparing sound detected by said transducer with original sound information stored in noise signal databank by noise signal processing unit for knowing information that detected parts is damaged or not then informing said information to motor vehicle driver through information display unit.

The invention discloses an automotive suspension test bed, relates to the technical field of fatigue verification for an automotive suspension and provides the automotive suspension test bed which is simple in structure, high in strength and capable of shortening the development and verification period of the automotive suspension and reducing test expenditures. The automotive suspension test bed comprises a plurality of stand columns, wherein a clamp plate with the height and the angle adjustable is installed on each stand column, and a calibrating mark is further arranged on each stand column and used for calibrating the installation position of the corresponding clamp plate. The automotive suspension test bed further comprises a loading mechanism used for being connected with a loading device, the stand columns are assembled with an automotive frame through the clamp plates in a matched and connected mode, the loading mechanism is connected with a brake disc on the frame, and the direction of the loading device is controlled so that the loading mechanism can perform suspension endurance verification under different working conditions. The automotive suspension test bed is mainly used in tests of fatigue verification for the automotive suspension.

An apparatus for counting and storing a number of rounds fired from a gun includes a microcomputer; a non-volatile memory connected to the microcomputer; and at least one piezoelectric transducer connected to the microcomputer and mounted on the gun, the at least one piezoelectric transducer comprising a power source that generates power during operation of the gun. The piezoelectric transducer may also sense the firing of the gun.

A system for use in monitoring, measuring, computing and displaying the volumes of internal gas within a telescopic aircraft landing gear strut. Pressure sensors and temperature sensors and motion sensors are mounted in relation to each of the landing gear struts to monitor, measure and record the impact movement and rates of internal landing gear strut fluids; experienced by landing gear struts, as the aircraft landing gear initially come into contact with the ground. The computer of this system measures the compression experienced by each landing gear strut and determines if the landing gear strut is improperly serviced with either excess or deficient volumes of nitrogen gas. Additional features include automating the inspections required to aircraft landing gear, prior to flight, during flight and during landing events.

The invention relates to a test method of multiple properties of automobile engine double mass flywheel torque insulator and a relative test bed. The method comprises utilizing a torsion movement device, first converting the rotation motion of a variable frequency motor into the torque motion demanded by the double mass flywheel torque insulator dynamic test, using a frequency converter to adjust the rotation speed of the variable frequency motor to realize the frequency needed by the torsion movement, then according to a demanded swing angle, adjusting the eccentricity of a crank wheel of the torsion movement device and the length of an adjustable link bar, to realize the amplitude of swing needed by the dynamic test torsion. The test bed comprises a variable frequency motor (1), a sensor detector, a test sample, a relative connector and a device for converting the rotation motion of the variable frequency motor into the torsion motion demanded by the double mass flywheel torque insulator dynamic test. The invention can process static property test, dynamic property test and durability test of double mass flywheel torque insulator on one test bed.

According to one embodiment of the present invention a method for testing a vehicle suspension using a kinematics rig is disclosed. The method includes receiving an input corresponding to a pre-programmed test procedure for testing the vehicle suspension; transmitting a control signal to the kinematics rig corresponding to the test procedure; receiving suspension data sensed by one or more vehicle suspension sensors during execution of the test procedure; receiving rig data sensed by one or more rig feedback sensors during execution of the test procedure; and formatting the suspension data and rig data for display via a graphical user interface (GUI).

Identifying fires by: measuring pressure pulses from the exhaust; generating a waveform from the measured pressure pulses; dividing the waveform into segments, one for each engine cylinder; associating each segment with the cylinder which generated the pulse; and examining each segment for features which indicate a misfire. The method further includes: generating a trigger signal; associating the trigger signal with ignition in a cylinder; measuring the time between this signal and the next trigger signal; dividing the time between these trigger signals into cylinder boxes, one for each cylinder; and shifting each of the boxes relative to the associated segment such that the peak and a portion of the rising edge and / or the falling edge falls within the box. For each box the peak, rising edge and falling edge is compared with threshold values. Each box in which at least two of the thresholds are exceeded is flagged.

In a wheel support bearing assembly including a plurality of rolling elements (5) interposed between an outer member (1) and an inner member (2), a sensor unit (21) is fitted to one of the outer member and the inner member, which serves as a stationary member. The sensor unit includes a sensor mounting member (22) and a strain sensor (23) fitted to the sensor mounting member. The sensor mounting member has a plurality of contact fixing portions (22a, 22b) that are fixed to at least two locations spaced a distant from each other in a direction circumferentially of the outer member. A cutout (24) is provided in the outer member at respective positions corresponding to the neighboring contact fixing portions of the sensor mounting member, so as to extend in an axial direction. The strain sensor is arranged intermediate between the neighboring contact fixing portions.

A leak detector apparatus for a pressurized cylinder having a cylinder of a radius (r) with a slidable piston in the cylinder with a gas filled chamber positioned between a cylinder end and the piston face. The length (L) of the chamber is calculated according to load changes on the piston where the volume (Vc) of the chamber changes. The pressure and temperature of the chamber are measured as well as the length. These values are inputted to a processor to solve the ideal gas law equation PV=nRT where a change in n for a change in length indicates a leak.

The invention discloses a multifunctional test bed for simulating condition by a one-quarter suspension of a vehicle, comprising a T-shaped groove base, a test bed support frame, an actuating bench assembly and a vehicle suspension assembly. The test bed support frame is arranged on one side of the T-shaped groove base; and the actuating bench assembly is arranged on the other side of the T-shaped groove base. The vehicle suspension assembly is arranged on a working disk of the actuating bench assembly; and the vibration response of a vehicle body and unsprung mass can be obtained by simulating the road surface vibration through the output of an actuating bench. The multifunctional test bed has multiple functions, can meet simulation condition tests of transverse arm type, multi-link type and Macphersan type suspension systems in the suspension forms, meet simulation condition tests of passive, semi-active and active suspension systems in the types and meet actual condition tests and pseudo-dynamic tests in the simulation modes. According to the test results, the invention not only can analyze the performance of single vibration absorber, but also can analyze the overall performance of the suspension and can verify control effects of magnetorheological semi-active suspension under different control strategies.

The invention belongs to the vehicle test apparatus field and especially relates to a six-dimensional parallel-connection test bench for an automobile suspension test. The six-dimensional parallel-connection test bench comprises a support rack for installing a suspension. The suspension is arranged on the support rack and is connected with wheels, a suspension spring and a damper. A road-condition simulation apparatus is connected below the wheels and comprises a bearing installation plate and a simulation plate, wherein the simulation plate is contacted with the wheels. A six-dimensional parallel mechanism is connected between the simulation plate and an installation plate. The road-condition simulation apparatus also comprises a position detection mechanism, wherein the position detection mechanism is fixed on the installation plate, is used for detecting motion quantity of the simulation plate, is connected with the bottom of the simulation plate and is provided with a triaxial gyroscope for detecting an inclination angle of the simulation plate. Pull and pressure sensors for detecting a bearing condition of the suspension and suspension displacement sensors for detecting change quantity of the suspension spring and the damper are mounted on the top of the suspension spring and the damper. A load mechanism is disposed on the top of the support rack and is connected with the suspension spring and the damper.