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A nonlinear model predictive control method for single pedal of pure electric vehicle

A nonlinear model, pure electric vehicle technology, applied in the direction of electric vehicles, control drives, control devices, etc., can solve the problems of sudden changes in vehicle longitudinal acceleration, lack of single-pedal control methods, poor driving safety and ride comfort, etc., to achieve optimization Energy consumption, improvement of driving safety, and improvement of economy

Active Publication Date: 2022-04-08
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some pure electric vehicles have been equipped with a single-pedal mode, but the existing single-pedal control technology only realizes the splicing of the functions of the accelerator pedal and the brake pedal, and does not combine the two driving modes of driving and braking according to the driver's driving intention. Therefore, there is a lack of a real single-pedal control method, and due to the unsuitability of most drivers in terms of driving habits, the application of a single-pedal will lead to serious changes in vehicle longitudinal acceleration, poor driving safety and ride comfort

Method used

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  • A nonlinear model predictive control method for single pedal of pure electric vehicle
  • A nonlinear model predictive control method for single pedal of pure electric vehicle
  • A nonlinear model predictive control method for single pedal of pure electric vehicle

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Embodiment Construction

[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0063] In this embodiment, a non-linear model predictive control method for a single pedal of a pure electric vehicle, such as figure 1 As shown, the specific steps are as follows:

[0064] Step 1, collecting real-time pedal opening through the pedal position sensor;

[0065] Step 2, use formula (1) to establish a single-pedal dynamic model, which is used to describe the relationship between pedal opening, pedal rotation angular velocity and pedal torque:

[0066]

[0067] In formula (1): is the pedal opening, is the derivative of pedal opening, ω p is the pedal rotation angular velocity, is the derivative of the angular velocity of pedal rotation, I p is the moment of inertia of the pedal, T p is the pedal torque operated by the driver, k s is the stiffness of the pedal return spring, k p is the compression conversion coefficient...

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Abstract

The invention discloses a non-linear model predictive control method for a single pedal of a pure electric vehicle, comprising the following steps: 1. Collecting the pedal opening; 2. Establishing a single-pedal dynamic model by using the pedal opening and the pedal rotation angular velocity; 3. Designing a sliding mode observation 4. Identify the driving / braking driving mode according to the pedal torque; 5. Establish a single-pedal control system model in combination with the vehicle state; 6. Construct a nonlinear model predictive controller, using the pedal The direct mapping relationship between torque and motor torque, with the goal of optimizing energy consumption, comfort and safety, obtains the best motor driving / braking torque and realizes motor torque control. The invention deepens the degree of fusion of driving and motor braking functions in the single-pedal mode, realizes a single-pedal in the true sense, and can meet the driver's power requirements at the same time, improve driving safety and energy utilization, and improve ride comfort sex.

Description

technical field [0001] The invention relates to a non-linear model predictive control method for a single pedal of a pure electric vehicle, in particular to a motor demand torque obtained by directly calculating the pedal torque of the single pedal operated by the driver, and considering the dynamic performance, safety, and One-pedal control method for economy and comfort. Background technique [0002] The motor braking energy recovery function can improve the energy utilization rate of pure electric vehicles. The introduction of the single-pedal function can reduce the number of times the driver switches the accelerator pedal and the brake pedal, and make full use of the motor braking function to recover braking energy. At present, some pure electric vehicles have been equipped with a single-pedal mode, but the existing single-pedal control technology only realizes the splicing of the functions of the accelerator pedal and the brake pedal, and does not combine the two driv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60W30/182B60W50/00B60W50/0098B60W40/08B60L15/2009B60L15/20B60W2050/0039B60W2520/10B60W2520/105B60W2520/26Y02T10/72
Inventor 石琴贺泽佳贺林魏宇江王铭伟
Owner HEFEI UNIV OF TECH
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