Electric vehicle power transmission system control method
A power transmission system and control method technology, applied in the direction of control devices, etc., can solve problems such as increased vibration and noise of the transmission system, poor ride comfort, vibration, etc., and achieve the goals of improving accuracy, ensuring continuity, and simplifying complexity Effect
Active Publication Date: 2019-04-12
HENAN POLYTECHNIC UNIV
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Problems solved by technology
At this time, the vibration and noise of the transmission system will increase significantly, which not only makes the components of the transmission system bear huge stress, but also affects the body, causing obvious vibration, which makes the ride comfort worse
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[0051] The specific implementation manners, structures, features and effects provided by the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. The structure of the electric vehicle power transmission system is as follows figure 1 As shown, the control method provided by the present invention is as figure 2 shown.
[0052] The control method of the electric vehicle power transmission system includes a fuzzy inference controller, a PID controller, and an error synthesizer; the error synthesizer has 4 inputs, which are respectively: motor rotor angular velocity error, motor shaft angular velocity error, difference subtraction Assembled angular velocity error and semi-axis transmission angular velocity error, the error synthesizer synthesizes the 4 input errors to obtain a synthesized error vector; the synthesized error vector is the input of the PID controller, the synthesized error vector and the The rate of cha...
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The invention relates to an electric vehicle power transmission system control method. A fuzzy reasoning controller, a PID controller and an error synthesizer are adopted; the error synthesizer has four inputs which respectively are an electric motor rotor angular speed error, an electric motor shaft angular speed error, a difference assembly angular speed error and a half shaft transmission angular speed error, and the error synthesizer carries out synthesis on four input errors to obtain a synthetic error vector; the synthetic error vector is an input of the PID controller, the synthetic error vector and a change rate of the synthetic error vector are inputs of the fuzzy reasoning controller, and the fuzzy reasoning controller regulates a coefficient of the PID controller in real time according to the synthetic error vector and the change rate of the synthetic error vector; and an output of the PID controller is an expected output torque of an electric motor. The electric vehicle power transmission system control method disclosed by the invention sufficiently utilizes the advantages of fuzzy control and PID control, ensures a torsional vibration inhibiting effect, is simple and effective, and has very high universality.
Description
technical field [0001] The invention belongs to the field of automobile power transmission, and in particular relates to a control method for an electric vehicle power transmission system. Background technique [0002] The power transmission system is the core part of electric vehicles and affects the overall performance of the vehicle. Drivetrains with front-wheel drive figure 1 As shown, it consists of motor rotor 1, motor shaft 2, differential reduction assembly 3, left drive half shaft 4, right drive half shaft 5, left wheel 6, right wheel 7, left tire 8, and right tire 9 sub-modules. The automotive powertrain is a continuous, damped system with an infinite number of degrees of freedom. The drive motor 1 is integrated with the differential reduction assembly 3, and drives the wheels through the left and right transmission half shafts, thereby driving the vehicle. [0003] Regardless of the influence of electromagnetic effects, only the mechanical vibration of the moto...
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IPC IPC(8): B60W50/00
CPCB60W50/00B60W2050/0002B60W2050/0011
Inventor 陈国强杨志飞代军
Owner HENAN POLYTECHNIC UNIV