Dynamic Deadband Control for Active Roll Stabilizer Response
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Solution Overview
Problem
Conventional active roll stabilizers (ARS) face limitations in efficiently determining the deadband period where torque is not transmitted, experience response delays, and struggle to maintain optimal response performance while suppressing vibration and noise during operation.
Innovation Solution
A vehicle control apparatus and method that includes sensors to sense vehicle speed and actuator operation information, and a controller to calculate target torque values and determine deadband periods using change values and states, while employing compensation gain values and filtering levels to manage noise and response commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conventional ARS uses a fixed deadband period setting, then the device complexity is reduced, but the response performance deteriorates due to response delays and inability to adapt to different operating conditions
Solution Approach 1:
The deadband period is changed from a fixed value to a dynamically determined value based on real-time torque change rates. The controller continuously monitors the torque change rate and adjusts the deadband period accordingly, allowing the system to adapt to varying operating conditions and maintain optimal response performance without excessive complexity
Solution Approach 2:
The system uses feedback from torque sensor data to determine the deadband period. By monitoring the torque change rate in real-time and using this information to adjust the deadband period, the system achieves adaptive response performance while keeping the determination process relatively simple through direct measurement and calculation
2Speed
If the conventional ARS transmits torque continuously without deadband period, then the response speed is improved, but vibration and noise increase during operation
Solution Approach 1:
The system preliminarily determines the deadband period based on torque change rate before torque transmission begins. This preliminary assessment allows the system to prepare appropriate deadband settings in advance, ensuring rapid response when needed while preventing vibration and noise by establishing appropriate torque transmission gaps before operation starts
Solution Approach 2:
The deadband period parameter is changed dynamically based on the torque change rate. When torque changes rapidly, a shorter deadband period is used to maintain response speed. When torque changes slowly, a longer deadband period is applied to reduce vibration and noise, thus adapting the parameter to different operating states
3Object-generated harmful factors
If the conventional ARS uses a long deadband period to suppress vibration, then vibration and noise are reduced, but response delay increases
Solution Approach 1:
The deadband period is made dynamic rather than fixed, adjusting in real-time based on torque change rate. This allows the system to use longer deadband periods only when torque changes slowly (reducing vibration) while using shorter deadband periods when torque changes rapidly (maintaining response speed), thus resolving the trade-off between vibration suppression and response delay
4Device complexity
If the conventional ARS uses simple deadband determination, then the device complexity is reduced, but the ability to maintain optimal response performance deteriorates
Solution Approach 1:
The system implements feedback control by continuously monitoring torque change rate and using this information to determine the deadband period. This feedback mechanism maintains optimal response performance through real-time adaptation while keeping the control logic relatively simple, as it relies on direct measurement and straightforward calculation based on monitored parameters
Data Source
AI summary
Provided are a vehicle control apparatus and a vehicle control method, including: a sensor configured to sense a vehicle speed value, operation information of an actuator for generating a torque in a stabilizer bar of an active roller stabilizer (ARS), and operation information of the stabilizer bar; and a controller configured to calculate a target torque value that is to be generated in the stabilizer bar on the basis of the sensed vehicle speed value, the sensed operation information of the actuator, and the sensed operation information of the stabilizer bar, and to determine whether the sensed vehicle speed value is a target vehicle speed value that is set to perform an ARS control mode, and in response to the sensed vehicle speed value determined to be the target vehicle speed value, and determine a deadband period in which a torque of the actuator is not transmitted, using a change value of a torque value and a change state of the torque value while the torque value is tracing the calculated target torque value.