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Dynamic load simulating device and method for automobile power system test

A power system and dynamic load technology, which is applied in the field of dynamic load simulation devices, can solve problems such as long cycle period, difficult to accurately measure speed differential, and large size of flywheel group, so as to improve dynamic stability, shorten development cycle, and simulate accuracy high effect

Inactive Publication Date: 2012-01-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the slow change of frictional resistance and wind resistance, it is easier to simulate, while the acceleration resistance changes with the change of vehicle acceleration, which changes faster and is more difficult to simulate
[0004] Generally, in the traditional dynamic load simulation method, the flywheel set is used to simulate the inertia of the car, but the flywheel set has the disadvantages of large volume, inconvenient adjustment and use, etc.
If directly adopted To calculate the inertial resistance of the vehicle, it is necessary to measure and calculate the differential value of the angular velocity of the power system, and the differential value of the velocity is difficult to measure accurately, often accompanied by large noise, and if the cycle period of the feedback control is long, it is easy to cause system oscillation
Therefore, this method has higher requirements on the accuracy of the test system and the cycle period of the control loop.

Method used

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  • Dynamic load simulating device and method for automobile power system test
  • Dynamic load simulating device and method for automobile power system test
  • Dynamic load simulating device and method for automobile power system test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A dynamic load simulator for automotive powertrain testing, such asfigure 1 As shown, it includes a control computer, a dynamometer controller, a frequency converter, an AC power dynamometer and a torque flange with a controller, and its peripheral equipment is the vehicle power system to be tested;

[0044] The vehicle power system to be tested includes engine, clutch and transmission;

[0045] The power output shaft of the vehicle power system to be tested is connected to the power shaft of the AC power dynamometer through a torque flange with a controller; the inverter and the AC power dynamometer are connected through a three-phase AC control line; the frequency converter and the dynamometer The machine controller and the torque flange with the controller are connected through the CAN bus; the control computer and the dynamometer controller are connected through Ethernet; connected to the analog output port used to simulate the throttle;

[0046] The above-mentione...

Embodiment 2

[0065] A dynamic load simulator for automotive powertrain testing, such as figure 1 As shown, it includes a control computer, a dynamometer controller, a frequency converter, an AC power dynamometer and a torque flange with a controller, and its peripheral equipment is the vehicle power system to be tested;

[0066] The vehicle power system to be tested includes engine, clutch and transmission;

[0067] The power output shaft of the vehicle power system to be tested is connected to the power shaft of the AC power dynamometer through a torque flange with a controller; the inverter and the AC power dynamometer are connected through a three-phase AC control line; the frequency converter and the dynamometer The machine controller and the torque flange with the controller are connected through the CAN bus; the control computer and the dynamometer controller are connected through Ethernet; connected to the analog output port used to simulate the throttle;

[0068] The above-mentio...

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Abstract

The invention relates to a dynamic load simulating device and a dynamic load simulating method for an automobile power system test, and belongs to the technical field of vehicle power system tests. The dynamic load simulating device comprises a control computer, a dynamometer controller, a frequency converter, an alternating current (AC) power dynamometer and a torque flange with a controller. A virtual automobile model-based control algorithm is adopted, a virtual automobile model is driven by an actual measurement torque, and the simulation of the rolling resistance, wind resistance and the inertia resistance of a vehicle is realized under the conditions of not calculating angular acceleration of the dynamometer. The dynamic load simulating device and the dynamic load simulating method have high stability and high simulation precision, are favorable for shortening the development cycle of an automobile power system and providing convenient test environment for the development of the power system. A process that the vehicle acceleration is acquired by differentiating the rotation speed of the automobile power system is avoided in the calculation process, and a phenomenon that accurate differential values are difficult to acquire due to relatively large noise caused by the process of differentiating the rotation speed is prevented.

Description

technical field [0001] The invention relates to a dynamic load simulation device and method for testing a vehicle power system, and belongs to the technical field of vehicle power system testing. technical background [0002] Bench test is an important means for the development of automobile power system. When performing engine test or test of power system integrating engine and gearbox, it is necessary to use dynamometer to simulate and control the load. With the development of automotive power systems, the requirements for the load simulation accuracy and response speed of the test system are getting higher and higher. Traditional dynamometer equipment includes hydraulic dynamometers, eddy current dynamometers, etc., but the hydraulic dynamometer control accuracy Low, the eddy current dynamometer cannot drag the force system backwards, and its application is subject to certain restrictions. With the development of motor control technology in recent years, AC power dynamom...

Claims

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Application Information

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IPC IPC(8): G01M15/00G01M13/02
Inventor 叶晓金振华卢青春
Owner TSINGHUA UNIV
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