Vehicle Curve-Entry Control Using Predictive Roll, Pitch, and Yaw Moments
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Solution Overview
Problem
Passengers experience discomfort and reduced sense of security when a vehicle runs on a curve due to uncontrolled vehicle behavior changes, as conventional systems react only after the behavior change occurs.
Innovation Solution
A vehicle control system that generates control moments, including roll, pitch, and yaw moments, before entering a curve based on road curvature and vehicle speed, using actuator units to adjust driving, braking, and suspension forces to prepare the vehicle for the upcoming curve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional control systems wait until vehicle behavior change occurs before acting, then the control system remains simple and reactive, but passenger sense of security decreases and ride quality deteriorates
Solution Approach 1:
The control system performs preliminary actions by detecting curve information ahead of time using road curvature detection means and navigation data. Before the vehicle actually enters the curve, the system calculates target motion state quantities and outputs control signals to the actuator unit to prepare the vehicle for upcoming behavior changes, thereby improving passenger security and reducing response time delay
Solution Approach 2:
The control system applies preliminary anti-action by generating counteracting moments before the vehicle behavior change occurs. The attitude control unit calculates control moments (roll, pitch, yaw) that oppose the expected vehicle behavior changes during curve navigation, and outputs these to the actuator unit in advance to prevent uncomfortable passenger experiences
2Reliability
If control moments are generated before entering a curve, then passenger security and comfort improve, but the complexity of the control system increases
Solution Approach 1:
The control system achieves multi-functionality by integrating multiple capabilities into unified components. The curvature information acquisition means serves both navigation and curve detection functions. The attitude control unit simultaneously calculates roll, pitch, and yaw moments while managing preliminary control and behavior reduction operations. This universal approach improves passenger security without proportionally increasing system complexity
Solution Approach 2:
The system merges previously separate functions into integrated control processes. Curve detection is combined with navigation data processing. The calculation of target motion state quantities integrates multiple control objectives (roll control, pitch control, yaw control) into a unified computational framework. This merging reduces overall system complexity while maintaining enhanced safety features
Data Source
AI summary
In one mode, with a vehicle control apparatus, a vehicle control method, and a vehicle control system according to the present invention, a control command is output for operating an actuator unit mounted in a vehicle, so as to obtain a control moment including at least one of a roll moment, a pitch moment, and a yaw moment that are generated for the vehicle before a curve on a traveling road on which the vehicle runs, based on a physical quantity about a curvature ahead on the traveling road and a physical quantity about a speed of the vehicle. In this way, the passenger's sense of security when the vehicle runs on the curve may be improved.