Abstract: A system for efficient machine control may include feedback devices for identifying operating conditions of a work machine and a controller for controlling a primary system and an auxiliary system. The controller may calculate a total energy loss by adding a primary system energy loss based on power requests from the primary system to an auxiliary system energy loss based on support requests from the auxiliary system. The controller may adjust a setting of the auxiliary system, repeat the calculating of the total energy loss, and compare the result to a previously calculated total energy loss until further adjustment of the setting fails to reduce the total energy loss. The controller may then send control requests to the auxiliary system based on the setting used when the total energy loss failed to reduce.

Abstract: A method for identifying and mapping a maximum instantaneous stall torque capability of a fuel cell cathode valve includes: maintaining a temperature of an electric motor at a predetermined temperature, wherein the predetermined temperature is equal to or less than a freezing point of water (0° C.), and the electric motor includes motor brushes, commutator poles, a stator, a rotor rotatable with respect to the stator, and a shaft coupled to the rotor; locking the shaft of the electric motor such that the shaft is incapable of rotating, thereby fixing the shaft at a locked position; mounting the shaft of the electric motor to a dynamometer; supplying electrical energy to the electric motor; monitoring an instantaneous stall torque of the electric motor; and monitoring a rotor electrical resistance.

Abstract: A method for use in dynamometer testing of a vehicle having a steering mechanism for changing steering angle of at a wheel hub connected to a first wheel shaft is provided. The method includes to apply a torque to the first wheel shaft using a first controllable dynamometer power source of a vehicle dynamometer test unit being rigidly connected to the wheel hub. A change of steering angle of the wheel hub rotates the rigidly connected first dynamometer test unit. An external force acting on the dynamometer test unit is applied to influence the force required by the vehicle steering mechanism to change steering angle of the wheel hub when changing steering angle of the wheel hub.

Abstract: A dynamometer device (1) is equipped at a tip end part of a dynamometer (3) with a cover (5) that covers the periphery of a torque meter (14). The cover (5) is formed on its side surface with an opening section (41) that is equipped with a door (42), and a rotation shaft is locked by inserting a locking plate (52) through this opening section (41). The locking plate (52) is slidably guided by a guide rail section. A part of an outer peripheral surface of the rotation shaft is provided with a surface to be locked that is along the tangential direction, and the rotation shaft is locked by engaging the locking surface (64) of the locking plate (52).

Abstract: A torque sensor arrangement including a contactless torque sensor, in which the torque sensor is arranged on an electrically operating linear carriage is provided. A distance sensor is also arranged on the linear carriage such that it allows the distance to the object of which the torque is to be determined to be measured.

Abstract: The present invention provides a drive-train testing system that is capable of generating a large drive torque without increasing the size of a motor that simulates an engine. The drive-train testing system inputs a drive torque, which is generated according to a torque command which contains an alternating-current component having an excitation frequency, to an input shaft of a workpiece in order to evaluate the performance of said workpiece. This system is equipped with a first motor, a second motor, a torque meter for detecting a torque which acts upon the shaft between the workpiece and the second motor, and a resonance suppression circuit that divides the torque command into a first torque command and a second torque command so as to suppress torsional resonance on the basis of a value detected by the torque meter.

Abstract: The invention relates to a torque sensor comprising an inner body, an outer annular body surrounding the inner body concentrically and webs connecting the inner body to the outer annular body in a star shape. Further on the torque sensor comprises a means for introducing torque and at least one measuring element on a web for determining deformation. The webs have the form of a u-profile.

Abstract: A target magnet assembly configured to be secured to a rotating shaft of a steering gear assembly. The target magnet assembly includes an index hub with a mount and a magnet secured by the mount. The mount includes a tab with a protrusion extending from the tab, a finger, and a stop. The magnet includes an axial retention groove receiving the finger, a top surface abutting the stop, and a radial retention groove receiving the protrusion.

Abstract: The invention relates to a torque sensor comprising an inner body, an outer annular body surrounding the inner body concentrically and webs connecting the inner body to the outer annular body in a star shape. Further on the torque sensor comprises a means for introducing torque and at least one measuring element on a web for determining deformation. The webs have the form of a u-profile.

Abstract: A rotational testing system for a test article includes a rotational test stand. The rotational test stand includes a rotating element having a drive end capable of being mechanically coupled with the test article. The rotational testing system also includes a non-isolating torsional damper attached to the rotating element.

Abstract: A pointer operation apparatus having a reaction force to a user operation changes an intensity of the reaction force according to respective users and/or user's conditions by using an operation unit, a force applicator, and other units. The intensity of the reaction force is determined by the pointer operation apparatus based on a relationship between a position of a pointer on a display unit and the reaction force applied to the operation unit, and the force applicator is controlled according to the relationship and the pointer position by the pointer operation apparatus. The relationship is changed based on a history of a pointer position movement (e.g., a speed/path of a pointer movement) recorded by the pointer operation apparatus.

Abstract: A rotational testing system for a test article includes a rotational test stand. The rotational test stand includes a rotating element having a drive end capable of being mechanically coupled with the test article. The rotational testing system also includes a non-isolating torsional damper attached to the rotating element.

Abstract: A method for testing the brakes of a wind energy system is provided, wherein the method comprising determining the brake torque by an indirect measurement. The method contains a comparison to defined threshold values for time and generator torque as well as time and actual power. Further, a computer-readable medium is provided that provides instructions which when executed by a computing platform cause the computing platform to perform operations wherein the operations include the method according to embodiments described herein. Further, a wind energy system is provided that has a rotor with a rotor brake and a calculation unit adapted for comparing two threshold values for time and torque to the actual values of time and torque, alternatively for comparing two threshold values for time and actual power to the actual values of time and actual power.

Abstract: The invention relates to the field of dynamometer drive adapters. In particular, the invention relates to dynamometer drive adapters for motorcycles.

Abstract: A testing apparatus that is used for measuring a vehicle's parasitic loss and overall, loaded efficiency utilizes an external electric drive motor, as an input, connected to the engine crankshaft of the vehicle and dynamometers connected to each driving wheel hub, to measure output at the wheels. Although its wheels with tires are removed, the vehicle remains largely intact and rests upon vehicle supports, which are mounted to a track system under the vehicle. The track system permits the drive motor and dynamometers to adjust and accommodate any vehicle for efficiency analysis. A computer monitors the driving motor input and output at the dynamometers to calculate efficiency.

Abstract: An ultrananocrystalline diamond (UNCD) element formed in a cantilever configuration is used in a highly sensitive, ultra-small sensor for measuring acceleration, shock, vibration and static pressure over a wide dynamic range. The cantilever UNCD element may be used in combination with a single anode, with measurements made either optically or by capacitance. In another embodiment, the cantilever UNCD element is disposed between two anodes, with DC voltages applied to the two anodes. With a small AC modulated voltage applied to the UNCD cantilever element and because of the symmetry of the applied voltage and the anode-cathode gap distance in the Fowler-Nordheim equation, any change in the anode voltage ratio V1/V2 required to maintain a specified current ratio precisely matches any displacement of the UNCD cantilever element from equilibrium. By measuring changes in the anode voltage ratio required to maintain a specified current ratio, the deflection of the UNCD cantilever can be precisely determined.

Abstract: A vehicle testing assembly for performing tests to determine certain characteristics of a motorized vehicle having a set of driven wheels. The testing assembly includes an annular roller with an outer surface. The roller is preferably formed of a steel composition. A controller is connected to the roller for retrieving data from the roller during a rotation of the roller. The testing assembly is characterized by a coating being applied to the outer surface of the roller to define a contact surface of the roller. The coating is formed of a coating composition different from the steel composition of the roller. Preferably, the coating composition comprises nickel and phosphorus. During operation of the vehicle testing assembly the wheel of the vehicle continuously contacts the contact surface of the coating to provide an accurate testing of the characteristics of the vehicle as the roller rotates.

Abstract: The invention relates to a method and an apparatus for the mass simulation of vehicle masses on a stationary roller test stand, wherein the simulation mass (msim) is determined from the test stand mass (mP) and from the mass (mRad h?) of the non-driven rotatable vehicle parts that are determined by measuring techniques, as well as from the mass (mRad h?) of the driven rotatable vehicle parts that are determined by measuring techniques, and with the aid of the translatory vehicle mass (mF), in an evaluating device (10) of the test stand.

Abstract: An improved roller 12 for a dynamometer 10 includes a plurality of equally spaced, congruent recesses 16 parallel to the longitudinal axis of the roller 12 and circumferentially positioned around the perimeter of the roller 12. The recesses 16 form a plurality of equally spaced, substantially planar, congruent surfaces 18 parallel to the longitudinal axis of the roller 12 and circumferentially positioned around the perimeter of the roller 12. The surfaces 18 engage the drive wheel of a vehicle and limit slippage and/or creepage between the drive wheel and the roller resulting in increased power transfer between the drive wheel and roller and increased dynamometer accuracy and repeatability.

Abstract: A method of controlling a chassis dynamometer (10) to simulate actual road conditions experienced by a vehicle (12) is disclosed. The chassis dynamometer (10) includes at least one actuator (14) coupled to a roller (16). The actuator (14) and roller (16) respond to commands from a controller (18). A load cell (22) is disposed between the actuator (14) and the roller (16) to measure the force exerted between vehicle's tires (24) and the surface of the roller (16). The method comprises the steps of rotating the roller (16) to attain a predetermined target force between the roller (16) and the vehicle (12) and includes the step of establishing a mathematical model of the target force between the roller (16) and the vehicle (12) and rotating the roller (16) in accordance with the mathematical model. The mathematical model accurately simulates the response of the actuator (14) and roller (16) for a given controller input to accurately predict the target force between the roller (16) and vehicle tires (24).

Abstract: A running resistance control apparatus of a chassis dynamometer comprises a target vehicle speed calculating section where a target vehicle speed is calculated on the basis of a control torque of a dynamometer, a running resistance torque, a mechanical loss torque, a detected vehicle speed, a vehicle weight and a mechanical weight of roller and a dynamometer. An electric inertia torque is compensated according to a difference between the detected vehicle speed and a target vehicle speed to adjust the detected vehicle speed at the target vehicle speed.