Abstract: A student training system for a vehicle system is provided. The student training system has a primary computer that displays a first GUI having a first case study command button associated with a first case study. The first case study is a training assignment associated with a first operational problem in the vehicle system. The primary computer displays a second GUI having text that describes the first operational problem, and a start case study command button. The primary computer sends a first code to the intermediate microprocessor when the start case study command button is selected. The intermediate microprocessor generates a control signal in response to the code to induce a controllable switch to electrically de-couple a first device from the controller to induce the vehicle system to have the first operational problem.

Abstract: A method of detecting brake fade for a vehicle brake system having wheel brakes susceptible to brake fade, includes the steps of: (a) providing a brake system including wheel brakes; and (b) determining the presence of brake fade within the vehicle system utilizing adaptive references maps, and wherein the adaptive reference maps include storing vehicle deceleration data and brake system fluid volume at different pressure points in a histogram.

Abstract: A control device comprising a processor that is configured to execute computer-executable instructions so as to control a robot, wherein the processor is configured to: control a robot with force control on the basis of a force detected by a force detecting device, determine pass/fail of a result of fitting work in which the robot holds an object and fits the object in an object to be fit, control the robot with the force control in the fitting work, and determine the pass/fail on the basis of whether a portion where the force detected by the force detecting device decreases by a first value or more is present in the fitting work.

Abstract: A brake testing system of testing a brake of a vehicle driven on a bench having a rotating body, comprises a rotation control unit that controls to make the rotating body rotate at a predetermined rotational speed, a torque acquiring unit that acquires a torque value generated on the rotating body by the brake of the vehicle being operated, a time period acquiring unit that acquires a time period during which the brake of the vehicle is operated, and a braking work load calculating unit that calculates a work load of the brake based on the rotational speed of the rotating body controlled by the rotation control unit, the torque value acquired by the torque acquiring unit, and the time period acquired by the time period acquiring unit.

Abstract: Disclosed is a rolling unit (8) for a test rig (1) for testing an automatic underground train, including: two rolling belts (27), each one provided for a wheel (6) of the train to roll thereon, the wheels driving the movement of the belts; and a rotary inertial body (28); each belt including: a pinion (31) that is rotatably connected to the inertial body; two rollers (33); and a grooved rolling surface (32) mounted on the rollers, meshed with the pinion, and forming a rolling area (34) for a respective wheel between the rollers.

Abstract: A brake test stand includes at least one driving motor that is coupled, via at least one torque transmitting device to a load generator and at least one brake to be tested, wherein the driving motor provides the energy to be converted by the brake to be tested and the load generator accepts the energy provided by the driving motor at least prior to the brake test.

Abstract: The invention discloses an automobile brake assembly fatigue test stand, which includes a base and a thermotank, wherein a mandrel is mounted inside the thermotank, two ends of the mandrel are respectively inserted into a first taper sleeve and a second taper sleeve, the first taper sleeve is mounted inside a hollow brake tooling, one end of the brake tooling is connected with a first bearing pedestal casing, the other end of the brake tooling is connected with a brake, the first bearing pedestal casing is sequentially connected with a brake shaft, a static torque sensor and a support; the second taper sleeve is mounted inside a brake drum tooling through a bearing, one end of the brake drum tooling is connected with a brake drum sleeved on the mandrel while the other end is connected with a brake drum shaft, and the brake drum shaft is sequentially connected with a second bearing pedestal casing, a coupling, a reducer and a first servo motor.

Abstract: What is described is a system for determining a force applied to an outer disc of an aircraft brake by an actuator motor. The system includes a current sensor coupled to the actuator motor and configured to detect a detected amount of current applied to the actuator motor. The system also includes a controller coupled to the current sensor. The controller is configured to determine an estimated current. The controller is also configured to receive the detected amount of current. The controller is also configured to determine an adjusted current based on the detected amount of current and the estimated current. The controller is also configured to determine an estimate of the force applied to the outer disc based on the adjusted current.

Abstract: What is described is a system for determining a force applied to an outer disc of an aircraft brake by an actuator motor. The system includes a current sensor coupled to the actuator motor and configured to detect an amount of current applied to the actuator motor. The system also includes a controller coupled to the current sensor. The controller is configured to determine an estimate of the force applied to the outer disc based on the detected amount of current and predetermined input parameters.

Abstract: To prevent occurrence of a slip between a tire and a drum and a flat spot on the tire and to reduce cycle time at a time of testing the tire, this tire testing method includes causing a control mechanism to control a motor to drive the tire to rotate at a predetermined rotational speed lower than a specified rotational speed if a linear sensor detects that the tire transported onto a center conveyor is sandwiched between an upper spindle and a lower spindle, and to control a moving mechanism to move a drum until the drum contacts the tire that rotates at the predetermined rotational speed. If a load cell detects the contact between the tire and the drum, then the control mechanism accelerates the rotation of the tire from the predetermined rotational speed to the specified rotational speed and increases a load applied to the tire by the drum, and the tire is tested.

Abstract: A brake system for a vehicle has a first and a second brake control device, four wheel actuator devices, and a first and a second signal line, the first signal line connecting the first brake control device to two of the four wheel actuator devices and the second signal line connecting the second brake control device to the two other wheel actuator devices, each of the four wheel actuator devices in the active state being additionally designed to detect whether a specified number of brake control devices and/or wheel actuator devices are in the inactive state, in which case a specified braking torque is exerted on the wheel of the vehicle associated with the brake control device.

Abstract: Method for monitoring the state of a tire, in which at least one analysis value (UR i), from which the state of a tire is determined, is formed from wheel speed signals (?rot i) of the vehicle wheels, wherein the analysis value (UR i) is an absolute rolling circumference of a tire or a variable which represents the absolute rolling circumference of a tire, in particular a dynamic tire radius which is determined by evaluating wheel speed signals (?rot i) and signals from at least one sensor in order to measure the speed of the vehicle over an underlying surface, and the analysis value (UR i) is used to determine a loss of pressure and/or working loads of the tire, as well as a device for monitoring the state of the tire.

Abstract: A chassis dynamometer for use with a test vehicle such as a snowmobile is provided. First and second spaced apart rolls support the test vehicle. A belt is arranged around the first and second rolls and rotationally couples the rolls to one another. The belt includes an outer surface on a test side of the belt for supporting the test vehicle. The belt reduces slipping of the track on the dynamometer. The belt receives inputs from the test vehicle. A processor quantifies the inputs from the test vehicle. A platform is arranged between the first and second rolls beneath the belt to maintain engagement of the track with the belt. The platform includes a load cell for detecting a longitudinal load imparted to the platform by the belt.

Abstract: A method and an apparatus for operating a test bench, e.g. a roller test bench, for carrying out simulation drives of a vehicle placed on the test bench. At least one vehicle wheel contacts at least one roller of the roller test bench. To determine the roller setpoint speed, a reaction torque of the roller in relation to the vehicle wheel is measured on the roller of the roller test bench.

Abstract: A collision reaction force measurement apparatus has a collision surface receiving a collision of a portable electronic device and a measurement part measuring a collision reaction force occurring when the portable electronic device makes the collision against the collision surface, wherein the collision surface comprises a plurality of collision surface elements and the measurement part comprises a plurality of measurement part elements provided for the plurality of collision surface elements, respectively.

Abstract: An apparatus and method of operating a rolling wheel testing apparatus includes driving a tire and wheel assembly about an axis of rotation with a tire in rolling contact with a rotatable drum. Torque is sensed about the axis of rotation and rotation of the drum is inhibited so as to develop a selected amount of torque about the axis of rotation as the tire and wheel assembly is rotated.

Abstract: The vehicle drag racing simulation system includes a drag racing simulation area typically for a plurality of vehicles, such as a flatbed of a truck. A restraining assembly is provided for rigidly securing the vehicles to the platform in a generally upright position. A rotatable drive wheel support member is also provided in each drag racing simulation area, having an outer face for rotatably engaging the drive wheels of the vehicles. The rotatable drive wheel support member is operatively engaged with an eddy current braking device allowing the application of a braking torque for simulating drag racing inertial, aerodynamic, and frictional forces. A brake torque sensor and control unit are provided for feedback control of the application of braking torque applied by the eddy current braking device based upon desired brake torque and actual brake torque applied.

Abstract: The invention relates to a capillary tube (1) determining the leakage rate for a test leak; in order to simplify its production and reduce the risk of breakage, it is proposed that the capillary tube (1) be a prior art quartz capillary tube encased in plastic. A holder joined to one end of the capillary tube by a removable connecting coupler has a nozzle for introducing a test sample into the tube.

Abstract: A chassis dynamometer for testing motor vehicles in place includes a frame, at least one roll for engaging the wheel(s) driven by the vehicle engine and an eddy current brake/inertia unit in which the brake rotor is attached to one end of the roll to form an integral structure rotatably supported on the frame at each end of the structure.

Abstract: A simulator for testing an Anti-lock braking system modulator capable of easily setting the yawing of a vehicle and disproportionate concentration of a vehicle weight according to the various vehicle weights and diverse road surface conditions has wheels rotated by compressively contacting flywheel pairs, a flywheel driving portion for transmitting and managing a driving force to the flywheels, rotation-speed sensors for monitoring the rotational speed of the wheels and flywheels, pneumatic cylinders installed to respective wheels for regulating a frictional force between the wheels and flywheels, a braking system for inciting a braking force to the wheels to which a modulator to be tested is mounted, a pneumatic pressure generating circuit for supplying a predetermined pressure to the braking system and pneumatic cylinder, and a controller electrically connected to the flywheel driving portion, rotation-speed sensors and pneumatic pressure generating circuit, in which the controller controls the flywheel dri

Abstract: Process and device for controlling the braking of a brake bench of a wheeled vehicle having plural interconnected drive shafts, each shaft having a differential. One wheel on a shaft is driven in the forward direction and the other wheel on the same shaft is driven in the rearward direction. The speed (V.sub.A) of the drive motor (7a) of the one wheel (3a) and the speed (V.sub.B) of the drive motor (7b) of the other wheel (3b) differ from each other such that the difference of the two speeds (V.sub.A, V.sub.B) is maintained less than a value such as will move another shaft of the vehicle which is external to the brake bench. The difference in the two speeds (V.sub.A, V.sub.B) is maintained less than 5% of the speed (V.sub.A) of the drive motor (7a) in the forward direction (A).

Abstract: A roadway simulator restraint system supports a vehicle at each of its wheels on simulated roadways which comprise endless belts suitably driven to cause wheel rotation. A plurality of passive links are provided for restraining the vehicle in longitudinal, lateral, and yaw degrees of freedom, while permitting free motion in roll and pitch moments, and vertical directions. Additionally, the linkages can provide inputs in aerodynamic force directions to simulate responses to vehicle dynamics during actual operation. The individual roadways that support the wheels can be independently controlled as to speed, and can be turned. Suitable force measurements are made in desired axes to provide for a complete controlled simulation of vehicle operation on an actual roadway.

Abstract: The invention deals with a traveling or driving simulator and especially a rake test stand for vehicles with antiskid brake systems, with drive rollers assigned to the vehicle wheels to be tested and slippage members, with adjustable slippage characteristic for brake torque dependent change of the drive torque between the drive rollers and the vehicle wheels, being assigned to the drive rollers. The drive rollers are coupled with each other by their drive shafts and driven by the flywheel masses of the rotating parts. In operation, the drive rollers can be accelerated up to the testing speed by the vehicle present upon the brake test stand. The slippage members are designed as electric or hydraulic machines controllable independently of each other. Thus, a slippage characteristic for different roadway conditions can be realized for each vehicle individually in a simple and optimized manner.

Abstract: The invention is a system for measuring the braking force of a vehicle, whereby a wheel of a vehicle is supported by a pair of spaced rollers having axes that are generally parallel with the axis of the wheel. At least one of the rollers is driven at a constant speed by a circulatory hydraulic fluid system which includes a hydraulic motor. The energy expended by the hydraulic motor in maintaining a constant speed of the roller(s) is a function of the pressure of the hydraulic fluid on the inlet side of the hydraulic motor. This hydraulic fluid pressure is measured and recorded both before and after application of the vehicle's brakes.

Abstract: A brake test method measures the brake force per axle of a vehicle by having an operator linearly depress the vehicle brake pedal while the axle's left and right wheels positioned on torque motor driven, constant speed rollers. The roller drive torque magnitude is periodically sampled and the samples are filtered to remove ovality discontinuities, the left and right side filtered samples are then compared to detect the maximum brake force imbalance.

Abstract: A vehicle restraint system for testing vehicles has vehicle restraint linkages which couple to a vehicle mounted on a simulated roadway to provide restraint in selected axes and to permit freedom of movement in other axes in a manner that permits the automobile to react as it would when being driven over an actual roadway. The restraint system is made to combine and limit lateral, longitudinal and yaw motions with a minimum effect on the handling properties in other axes of movement. The restraint system includes selective, active servo positioning in the restrained axes so that the position of the vehicle can be maintained so that the vehicle tires are kept within a load support area of the simulated roadway without substantially affecting the vehicle handling properties. The linkages used are operated through actuators that can also be used as passive restraints, that is, providing a spring force to maintain the vehicle in a desired location.

Abstract: A vehicle-mounted electronic control unit such as an anti-lock brake control unit is connected to a testing device through two serial transmission lines for testing. Upon startup of the control unit, signals are exchanged therebetween. Only if the signal exchange is completed in a predetermined period of time, the control unit enters into a special operation mode for testing. Otherwise, it is controlled in an ordinary mode. In this test mode, the data in the control unit such as a wheel speed are sent to the testing device to be inputted in its test programs. The testing device then gives to the control unit various command signals produced according to its programs. The control unit then sends test signals in response to the command signals to actuators. Thus, when the control unit is in the test mode, the testing device can control the actuators by transmitting command signals to the control unit and thus can test the performance of not only the control unit but also the actuators from various angles.

Abstract: A method is described for testing brakes on brake test stands or rigs for motor vehicles with a plurality of motor-driven axles, wherein the axle of the brake to be tested is not de-couplable. Both wheels of this axle stand on rollers or the like on the rig and, during the test procedure, are driven in opposite directions. During the test the speed of rotation of both wheels is measured and is maintained equal by means of a control operation regulated by the result of the measurement. Apparatus is described which includes devices, such as contact rollers, which measure the speed of rotation but are separate from the devices for driving the wheels. In the event of differences being detected between the measured rotational speed and the rotation speed of the other wheel a controller adjusts the rotational speed of one or both wheels. It is especially favorable if, on the wheels of the axle of the brake to be tested, a mark is secured which co-operates with a path or position recorder.

Abstract: A dynamometer comprises a drum mounted for rotation and driven by a drive motor, a test body coupled to the drum for rotation therewith in a fixed velocity relationship, a sensor apparatus for deriving the energy absorbed or dissipated by the test body, a sensor for determining the rotational velocity of the drum or body, and a control apparatus responsive to the energy absorbed or dissipated and to the rotational velocity and operative to supply a control signal to the drive motor to maintain the energy absorbed or dissipated as a predetermined function of drum speed.

Abstract: Apparatus for measuring braking actions of an automotive vehicle wherein the braking power is measured between the ground and a braked wheel of the automotive vehicle, and wherein data required for identification of the automotive vehicle are recorded, this process being characterized in that for each wheel (7), the weight resting on the wheel is likewise measured, and that further parameters of the braking action are calculated on the basis of the measured values. The apparatus comprises a braking power test stand, and a computing unit, with storage, indicator and/or recording units. The apparatus also has weight measuring units (1), and an output of each of the braking power test stand (6) and of the weight measuring units (1) is connected to inputs of the computing unit (10). An output of each of the computing unit (10) and the storage unit is connected to a respective input of the indicator and/or recording unit (11).

Abstract: A brake testing apparatus comprises at least one pair of motor-driven rollers on which a wheel having a brake to be tested is mounted. A leaf spring is attached at one end to the motor stator and its free end is held between opposed abutments so that when the wheel is braked, a reverse torque in the stator induces a stress in the leaf spring. Strain gauges are provided on opposite surfaces of the spring to sense the induced stress, the strain gauges being formed as a Wheatstone bridge arrangement connected in an electric circuit which measures the induced stress as a function of the bridge imbalance.

Abstract: A method and apparatus is disclosed for dynamically testing the operation of a vehicle anti-skid brake system of the kind which has first and second sensors associated with first and second vehicle wheels and which operates, when the brakes are being applied by the vehicle to release brake force to both wheels when either sensor senses imminent lock-up of its respective wheel. The method includes the steps of engaging the peripheries of both wheels with the peripheries of first and second motor-driven rolls, driving the rolls up to a high peripheral speed, applying and maintaining the vehicle brakes releasing the motor-drive to the first roll so that the first wheel tends to lock-up thereby actuating the anti-skid system, reapplying the motor drive to the first roll, releasing the motor drive to the second roll so that the second wheel tends to lock-up thereby actuating the anti-skid system, and generating signals in response to the actuation of the anti-skid system by either sensor.

Abstract: An apparatus for analyzing the performance of wheeled, land vehicle brake systems is described wherein means are provided for driving the vehicle wheels at a predetermined speed and the operator or computer controlled brake actuator selectively applies the brakes in a series of simple successive steps comprising the test sequence. The pedal force, or other actuating force, the brake effort exerted by each wheel, and the imbalance between the braking effort of opposite wheels is measured and recorded on a strip chart or fed to a computer, to determine if the measured values fall outside of a predetermined range of values representing acceptable deviations from standard values. Any deviation of the brake effort from the acceptable values, or excessive imbalance between opposite wheels at any point in the test sequence, may be used as a basis for diagnosing and identifying a specific brake malfunction. The system can be enlarged to simultaneously test the brakes on all wheels of a land vehicle.

Abstract: Wheel-contact rollers for a vehicle test-bed have helical grooves formed in their outer surfaces to improve start-up friction by providing fast removal of water and other foreign materials from tire surfaces. The grooves are preferably formed by a thread-cutting or thread-forming process. The helical grooves should be equally-sloped left-hand and right-hand threads, in order to provide balanced side-to-side forces on the tire; however, the opposing left and right hand slopes may be formed on separate rollers, i.e., one slope on the left wheel roller and the opposite slope on the right wheel roller.

Abstract: An apparatus for analyzing the performance of wheeled, land vehicle brake systems is described wherein means are provided for driving the vehicle wheels at a predetermined speed and the operator or computer controlled brake actuator selectively applies the brakes in a series of simple successive steps comprising the test sequence. The pedal force, or other actuating force, the brake effort exerted by each wheel, and the imbalance between the braking effort of opposite wheels is measured and recorded on a strip chart or fed to a computer, to determine if the measured values fall outside of a predetermined range of values representing acceptable deviations from standard values. Any deviation of the brake effort from the acceptable values, or excessive imbalance between opposite wheels at any point in the test sequence, may be used as a basis for diagnosing and identifying a specific brake malfunction. The system can be enlarged to simultaneously test the brakes on all wheels of a land vehicle.

Abstract: A method for dynamically testing the operation of a vehicle anti-skid brake system and for making a record thereof includes engaging a wheel of the vehicle with a rapidly rotating roller or the like and accurately measuring and recording changes in an appropriate operating characteristic of the wheel while the vehicle brakes are being fully applied with sufficient power to rapidly slow the roller to essentially zero rpm and simultaneously to cause the anti-skid system, if operating properly, to rapidly release and reapply brake force in a manner to cause the wheel speed to decrease in stepwise fashion. The rotating roller slips relative to the vehicle wheel during application of brake force so that the wheel will be accelerated by the roll during release of brake force.

Abstract: A testing machine for a tire on an imitation road in which a tire to be tested is urged against a crawler with the aid of a cantilever arm connected through a crosshead to a lifting and lowering disc engaged with screw threaded rods rotatably mounted in a machine frame. The crawler is composed of an endless chain and a road surface forming rods detachably mounted on the endless chain and replaceable by new rods made of different kind of material. In the crosshead are incorporated slip and camber angle setting mechanisms. Provision is made of load cells such as a strain gauge operatively connected to a tire supporting shaft, driving and driven shafts of the crawler and a guide rail of the crawler and for detecting a vertical load subjected to the tire, a torque for driving the crawler under various load conditions and a transverse component of force subjected to the crawler when the tire having a given slip angle or a camber angle is urged against the crawler.

Abstract: An apparatus for analyzing the performance of wheeled, land vehicle brake systems is described wherein means are provided for driving the vehicle wheels at a predetermined speed and the operator or computer controlled brake actuator selectively applies the brakes in a series of simple successive steps comprising the test sequence. The pedal force, or other actuating force, the brake effort exerted by each wheel, and the imbalance between the braking effort of opposite wheels is measured and recorded on a strip chart or fed to a computer, to determine if the measured values fall outside of a predetermined range of values representing acceptable deviations from standard values. Any deviation of the brake effort from the acceptable values, or excessive imbalance between opposite wheels at any point in the test sequence, may be used as a basis for diagnosing and identifying a specific brake malfunction. The system can be enlarged to simultaneously test the brakes on all wheels of a land vehicle.

Abstract: A rate control system is disclosed for use in a brake testing apparatus which applies an automatically controlld force to the vehicle braking system being tested. The rate control system varies the rate of flow of hydraulic fluid displaced as the brake pedal moves on its brake application stroke, in response to the rate of increase of a feedback signal which represents the vehicle stopping force, or brake effort, measured at a vehicle wheel. Varying the rate of flow of hydraulic fluid controls the rate of application of the vehicle braking system during the test.

Abstract: A roller type brake testing device is disclosed which incudes two pairs of cradling rollers for supporting and applying a driving torque to two wheels of a vehicle such as an automobile. The testing device includes a pneumatic lift mechanism for selectively raising and lowering the rollers which engage the rear portion of the wheels and through which driving torque is applied to the wheels. The brake tester may further include an indicator such as a pressure gauge for displaying a measure of the weight of the axle supporting the vehicle wheels to guide the operator in applying the brakes to achieve a braking effort correlated with axle weight.

Abstract: An apparatus for analyzing the performance of wheeled, land vehicle brake systems is described wherein means are provided for driving the vehicle wheels at a predetermined speed and the operator or computer controlled brake actuator selectively applies the brakes in a series of simple successive steps comprising the test sequence. The pedal force, or other actuating force, the brake effort exerted by each wheel, and the imbalance between the braking effort of opposite wheels is measured and recorded on a strip chart or fed to a computer, to determine if the measured values fall outside of a predetermined range of values representing acceptable deviations from standard values. Any deviation of the brake effort from the acceptable values, or excessive imbalance between opposite wheels at any point in the test sequence, may be used as a basis for diagnosing and identifying a specific brake malfunction. The system can be enlarged to simultaneously test the brakes on all wheels of a land vehicle.