The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

Shuang Xiao - One of the best experts on this subject based on the ideXlab platform.

  • Temperature characteristic of ring type Dynamometer based on FBG sensors
    2015 IEEE International Conference on Mechatronics and Automation (ICMA), 2015
    Co-Authors: Zhijian Zhang, Dongliang Ji, Shuang Xiao
    Abstract:

    In order to solve the problem that the measurement accuracy of FBG sensors used in the ring type Dynamometer is vulnerable to be influenced by temperature fluctuations and others, a method for the temperature compensation of ring type Dynamometer is necessary. A method that using wavelength multiplexed technology of fiber Bragg grating to test temperature and strain simultaneously has been proposed. This paper studies temperature characteristics of FBG sensors and annulus elastic body. Temperature calibration experiment which is used to obtain the temperature characteristic function of FBG sensors and annulus elastic body has also been done. Through the analysis of data, the temperature characteristic of ring type Dynamometer has been obtained, and it owns good linearity. By using the temperature characteristic of ring type Dynamometer, the effect of temperature fluctuation on the measurement accuracy can be compensated, which can enhance the cutting force measurement precision of ring type Dynamometer.

Fredemar Runcos - One of the best experts on this subject based on the ideXlab platform.

  • Comparative analyses of standards temperature rise test methods for induction machines
    2009 Record of Conference Papers - Industry Applications Society 56th Annual Petruleum and Chemical Industry Conference, 2009
    Co-Authors: Glauco Cisz, Fredemar Runcos, Stephen Waite
    Abstract:

    Induction machines temperature rise measurement is certainly a common demand of customers and manufacturers. The manufacturers have to optimize the product to be competitive, while the user wants to be sure that the motor is in accordance with the insulation temperature class limit. The most accepted condition to measure temperature rise in induction motors is under full load since it simulates the real operating conditions. However, it requires the use of Dynamometers and sources of same or sometimes greater power than the rated power of machine under test. Additionally the coupling of high power, high speed or vertical machines can consume considerable time and investment. For these cases it is necessary to consider the use of alternative methods to measure the electrical machine temperature. In these alternative methods the load torque applied by the Dynamometer is smaller than the motor nominal torque or even no load torque applied. This paper will present a comparison between the most common induction machines temperature rise methods.

  • Comparative analyses of standards temperature rise test methods for induction machines
    2008 18th International Conference on Electrical Machines, 2008
    Co-Authors: C. G. C. Neves, Glauco Cisz, Fredemar Runcos
    Abstract:

    To measure induction machines temperature rise is no doubt a common demand of customers and manufacturers. The manufacturers must optimize the product to be competitive, while the user must be sure about the motor insulation class limit. The most accepted condition to measure temperature rise in induction motors is under full load. This condition is advantageous because it simulates real life operation on field. However, this requires for Dynamometers and sources of same or sometimes greater power than the rated power of machine under test. Besides the coupling of high power, high speed or vertical machines can consume considerable time and investment. In these cases it is necessary to use alternative methods to measure the electrical machine temperature. In these methods the load torque applied by the Dynamometer is smaller than the motor nominal torque or even no load torque is applied. In this paper we will present a comparison between the most common induction machines temperature rise methods.

Thomas R. Chase - One of the best experts on this subject based on the ideXlab platform.

  • Virtual Vehicle Control Concept for Hydrostatic Dynamometer Control
    Journal of Dynamic Systems Measurement and Control-transactions of The Asme, 2016
    Co-Authors: Zhekang Du, Tan Cheng, Perry Y. Li, Kai Loon Cheong, Thomas R. Chase
    Abstract:

    An approach for controlling a hydrostatic Dynamometer for the hardware-in-the-loop (HIL) testing of hybrid vehicles is proposed and experimentally evaluated. The hydrostatic Dynamometer, which is capable of absorbing and regenerating power, was specifically designed and built in-house to evaluate the fuel economy and control strategy of a hydraulic hybrid vehicle being developed. Unlike a chassis Dynamometer whose inertia is similar to the inertia of the vehicle being tested, the inertia of this hydrostatic Dynamometer is only 3% of the actual vehicle. While this makes the system low cost, compact, and flexible for testing vehicles with different weights and drag characteristics, control challenges result. In particular, the Dynamometer must apply, in addition to the torques to mimic the wind and road drag, also the torques to mimic the acceleration and deceleration of the missing inertia. To avoid estimating the acceleration and deceleration, which would be a noncausal operation, a virtual vehicle concept is introduced. The virtual vehicle model generates, in response to the applied vehicle torque, a reference speed profile which represents the behavior of the actual vehicle if driven on the road. This reformulates the Dynamometer control problem into one of enabling the actual vehicle Dynamometer shaft to track the speed of the virtual vehicle, instead of directly applying a desired torque. To track the virtual vehicle speed, a controller with feedforward and feedback components is designed using an experimentally validated dynamic model of the Dynamometer. The approach has been successfully tested on a power-split hydraulic hybrid vehicle with acceptable virtual vehicle speed and Dynamometer torque tracking performance.

  • Virtual Vehicle Control Concept for Hydrostatic Dynamometer Control 1
    Journal of Dynamic Systems Measurement and Control, 2016
    Co-Authors: Zhekang Du, Kai Loon Cheong, Tan Cheng, Perry Y. Li, Thomas R. Chase
    Abstract:

    © 2017 by ASME. An approach for controlling a hydrostatic Dynamometer for the hardware-in-the-loop (HIL) testing of hybrid vehicles is proposed and experimentally evaluated. The hydrostatic Dynamometer, which is capable of absorbing and regenerating power, was specifically designed and built in-house to evaluate the fuel economy and control strategy of a hydraulic hybrid vehicle being developed. Unlike a chassis Dynamometer whose inertia is similar to the inertia of the vehicle being tested, the inertia of this hydrostatic Dynamometer is only 3% of the actual vehicle. While this makes the system low cost, compact, and flexible for testing vehicles with different weights and drag characteristics, control challenges result. In particular, the Dynamometer must apply, in addition to the torques to mimic the wind and road drag, also the torques to mimic the acceleration and deceleration of the missing inertia. To avoid estimating the acceleration and deceleration, which would be a noncausal operation, a virtual vehicle concept is introduced. The virtual vehicle model generates, in response to the applied vehicle torque, a reference speed profile which represents the behavior of the actual vehicle if driven on the road. This reformulates the Dynamometer control problem into one of enabling the actual vehicle Dynamometer shaft to track the speed of the virtual vehicle, instead of directly applying a desired torque. To track the virtual vehicle speed, a controller with feedforward and feedback components is designed using an experimentally validated dynamic model of the Dynamometer. The approach has been successfully tested on a power-split hydraulic hybrid vehicle with acceptable virtual vehicle speed and Dynamometer torque tracking performance.

Zhijian Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Temperature characteristic of ring type Dynamometer based on FBG sensors
    2015 IEEE International Conference on Mechatronics and Automation (ICMA), 2015
    Co-Authors: Zhijian Zhang, Dongliang Ji, Shuang Xiao
    Abstract:

    In order to solve the problem that the measurement accuracy of FBG sensors used in the ring type Dynamometer is vulnerable to be influenced by temperature fluctuations and others, a method for the temperature compensation of ring type Dynamometer is necessary. A method that using wavelength multiplexed technology of fiber Bragg grating to test temperature and strain simultaneously has been proposed. This paper studies temperature characteristics of FBG sensors and annulus elastic body. Temperature calibration experiment which is used to obtain the temperature characteristic function of FBG sensors and annulus elastic body has also been done. Through the analysis of data, the temperature characteristic of ring type Dynamometer has been obtained, and it owns good linearity. By using the temperature characteristic of ring type Dynamometer, the effect of temperature fluctuation on the measurement accuracy can be compensated, which can enhance the cutting force measurement precision of ring type Dynamometer.

Gokhan Meric - One of the best experts on this subject based on the ideXlab platform.

  • Can a wearable strain sensor based on a carbon nanotube network be an alternative to an isokinetic Dynamometer for the measurement of knee-extensor muscle strength?
    Measurement Science and Technology, 2017
    Co-Authors: Ruhan Benlikaya, Yavuz Ege, Zekine Pündük, Petr Slobodian, Gokhan Meric
    Abstract:

    This study aimed to find out whether a wearable strain sensor including thermoplastic polyurethane composite with a multi-walled carbon nanotube network could be a viable alternative to an isokinetic Dynamometer for the measurement of knee-extensor muscle strength. For the first time, the voltage-torque and angle-time relations of the sensor were determined to allow a comparison between the angle-dependent torque changes of the Dynamometer and the sensor. This comparison suggested that the torque-angle relations of the Dynamometer and the sensor did not have the same characteristics. In this regard, the sensor may be used in the torque measurements due to the moderate correlation between the torque values determined via the isokinetic Dynamometer and the sensor and due to the significant difference between low and high torque values of the sensor. By the same token, the torque-angle graph of the sensor may be more informative than that of the Dynamometer in evaluation of knee problems.