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A vehicle stability integrated control method

A technology that integrates control and stability, applied in control devices, vehicle components, driver input parameters, etc., can solve problems such as loss of effectiveness and accuracy, avoid coupling and interference, improve ride comfort and stability, The effect of restoring stability

Active Publication Date: 2017-03-29
JILIN UNIV
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Problems solved by technology

At present, the calculation of the reference state of the vehicle is usually to use the ideal two-degree-of-freedom vehicle model to linearly calculate the ideal state of the vehicle according to the driver's steering wheel angle signal and vehicle speed signal. This is when the driver is driving normally. This calculation method loses its effectiveness and accuracy when the driver loses control, so it has certain limitations

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  • A vehicle stability integrated control method
  • A vehicle stability integrated control method
  • A vehicle stability integrated control method

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Embodiment Construction

[0030] Below in conjunction with the accompanying drawings, the technical solution proposed by the invention is further elaborated and illustrated.

[0031] The invention provides an integrated control method for vehicle stability, such as figure 1 As shown, the method includes the following steps:

[0032] 1. Real-time collection and processing of current vehicle status information:

[0033] First, the vehicle status information fed back by the on-board sensors is collected in real time, including the steering wheel angle signal collected by the steering sensor, the yaw rate signal at the center of mass of the vehicle collected by the yaw rate sensor (gyroscope), and the longitudinal and lateral directions measured by the acceleration sensor. Acceleration signal, the pressure sensor detects the actual pressure signal of the brake pipe at the wheel, and the wheel speed sensor measures the angular velocity of the wheel. These signals are filtered or estimated to update the ve...

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Abstract

The invention discloses a stability integrated control method of a vehicle. The stability and the ride comfort of the vehicle are guaranteed by regulating the front-wheel steering angles and the braking force of corresponding tires. The control method comprises the following steps of collecting the running state information of the vehicle, and carrying out wave filtering and estimation treatment; planning a reference state value through which the vehicle is enabled to run stably; evaluating the stability risk of the vehicle according to the actual running state of the vehicle and the reference state value; when the vehicle does not have the stability risk, unnecessarily carrying out control, otherwise, necessarily planning and deciding front-wheel steering angles and additional yawing moments, through which the vehicle is enabled to recover the stability; converting the additional yawing moments into the expected braking force of the corresponding tires, meanwhile, comparing the expected braking force with the actual pressure of a wheel cylinder, and determining a solenoid valve action instruction; actuating the solenoid valve action instruction and a front-wheel steering angle instruction by a braking actuator and a steering actuator, so that the vehicle is enabled to recover to run stably.

Description

technical field [0001] The invention relates to a vehicle active safety control method, in particular to a vehicle stability integrated control method based on Lyapunov's second method. Background technique [0002] At present, the stability control systems of vehicles mainly include anti-lock braking system (ABS), traction control system (ASR), active steering system (AFS), vehicle stability control system (ESP), etc. It assists the driver in manipulating the vehicle on different road surfaces. However, since the vehicle is a complex nonlinear system, the simple superposition of various control systems will not only fail to improve the stability of the vehicle, but will cause coupling and interference to varying degrees. Therefore, the emergence of integrated control systems greatly simplifies the control program. , which improves the stability and maneuverability of the vehicle. [0003] The Active Front Steering System (AFS) corrects the driver's steering signal without...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/02B60W10/20B60W10/18B60W40/10B60W40/105B60W40/08B60W40/112B60W40/114
CPCB60W10/18B60W10/20B60W30/02B60W30/025B60W40/08B60W40/10B60W40/105B60W40/112B60W40/114B60W2520/10B60W2520/125B60W2520/14B60W2540/18B60W2710/18B60W2710/207
Inventor 郭洪艳房丽爽郝宁峰陈虹
Owner JILIN UNIV
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