In order to easily and accurately measure the cogging torque of an electric motor, the present invention includes a dynamometer connected to an electric motor, a torque sensor adapted to measure the torque of the electric motor, and a cogging torque measurement motor for measuring the cogging torque of the electric motor, and is configured such that when measuring the cogging torque of the electric motor, the electric motor, the dynamometer, and the cogging torque measurement motor are connected.

A field agricultural machinery test platform, comprising a field soil groove, traveling guide rails, traveling trolleys, a hitch trolley, a hitch device mechanism, and a test system. The two guide rails are provided on both sides of the field soil groove in parallel, and the traveling trolleys are located on the guide rails; a cross beam is provided between the two guide rails, and the two ends of the cross beam are respectively connected to the traveling trolleys; the hitch trolley is provided on the cross beam, and a hitch device is provided on the hitch trolley; the test system is provided on the hitch trolley and the hitch device; a test machine is connected to the hitch device; the test system comprises an image assembly, a force test assembly, and a control assembly which are mounted on the hitch trolley.

A testing method, for a camera-based autonomous or semi-autonomous vehicle control system, includes while the vehicle control system operates with at least one control input from at least one camera during a first laboratory test of the vehicle control system, automatically controlling an electronic simulator configured to generate signals indicative of dynamic virtual lane markers based on speed information from a speed schedule or a feedback signal from a laboratory instrument, and displaying the virtual lane markers on a transparent or semi-transparent screen or monitor, within view of the at least one camera, and at screen or monitor coordinates reflective of relative locations of the at least one camera and the screen or monitor.

To subject a test object during a test run on a test bench to real environmental and/or surrounding conditions, particularly thermal conditions, it is provided that at least one temperature is measured at a measurement point as a measured variable during the test run on the test bench. At least one test object component of the test object is subdivided in a number of segments. The thermal interaction of at least one segment with the environment of the vehicle is simulated during the test run by a thermal simulation model of the simulation model. The thermal simulation model calculates the segment heat flow that is supplied to or dissipated from the at least one segment. This segment heat flow is adjusted as a function of the measured temperature at the test bench on at least one segment by means of a number of heat flow actuators.

Systems and methods for improving fuel economy in vehicles such as Class 8 trucks are provided. In some embodiments, signals indicating states of the powertrain are collected and used to generate fuel rate optimization values. Fuel rate optimization values may indicate a difference between optimum fuel flow rates and actual fuel flow rates during a vehicle drive cycle. Recorded fuel rate optimization values may be used to compare different vehicle configurations during testing, and may also be used to evaluate vehicle performance during real-world operation.

A method for simulating cornering of a vehicle 2 being tested on a roller dynamometer 1 to determine a measured variable 13, wherein the vehicle 2 being tested on the roller dynamometer 1 is operated as though driving straight ahead, and to simulate cornering the additional resistance forces of cornering are taken into account in the form of a correction parameter 9.

This control device 6 comprises a uniform-speed synchronization control unit 63 for generating a synchronization correction input Fd for front-wheel and rear-wheel dynamometers so that a difference between front and rear speeds is eliminated, a load balance computation unit 62 for generating a front-wheel load balance correction input Ffil_f and a rear-wheel load balance correction input Ffil_r, a front-wheel torque current command generation unit 64f for generating a front-wheel torque current command on the basis of the inputs Ffil_f and Fd, and a rear-wheel torque current command generation unit 64r for generating a rear-wheel torque current command on the basis of the inputs Ffil_r and Fd. The load balance computation unit 62 causes the inputs Ffil_f and Ffil_r to change independently of one another, raises the input Ffil_f a rear-wheel drive force Fvr increases, and raises the input Ffil_r as a rear-wheel drive force Fvf increases.

The present invention is a test object testing device that reproduces real driving in a real world with high accuracy using a bench test device and tests a test object that is a vehicle or a part of the vehicle, the test object testing device including a dynamometer that applies a load to the test object, a travel route setting unit that sets a travel route using a map, a road information acquisition unit that acquires road information of the travel route from a map, a travel resistance calculation unit that calculates a travel resistance of the test object on the basis of the road information, and a dynamometer control unit that controls the dynamometer on the basis of the travel resistance.

A vehicle is received in a stationary controlled area of a controlled testing environment. Simulation inputs corresponding to a simulated scene are generated and transmitted to the vehicle. The vehicle applies torque in response. A vehicle control mechanism of the controlled testing environment, such as a chassis dynamometer, a motorized treadmill, or a lift, keeps the vehicle within the stationary controlled area during the test despite the torque applied by the vehicle. A path of the vehicle within the simulated scene is determined based on the applied torque, based upon which the vehicle's navigation system is calibrated.

A processor, responsive to a set of location or motion data describing one or more objects relative to a first, local frame of reference, generates a transformed set of location or motion data describing the one or more objects relative to a second, local frame of reference different than the first local frame of reference, such that the set of location or motion data and the transformed set of location or motion data relative to a global frame of reference are same. The processor also outputs the transformed set of location or motion data to a vehicle such that the vehicle performs control operations responsive thereto.