Motorcycle Posture Control via Speed-Adaptive Yaw-Roll Sensor Fusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motorcycle posture control systems face challenges in accurately controlling the posture of a motorcycle across a wide range of speeds, struggling to provide appropriate assist forces during low-speed and high-speed turns due to reliance on a single sensor output for roll direction.
Innovation Solution
A posture control device that utilizes a combination of yaw and roll direction sensors, adjusting their outputs based on vehicle speed to generate a synthesized output, with the actuator imparting steering assist forces tailored to the detected speed, ensuring accurate posture control from low to high speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only roll direction sensor output is used for posture control, then the control system is simple, but the accuracy of posture control at different speeds deteriorates
Solution Approach 1:
The patent segments the sensor output into two distinct components: roll direction output and yaw direction output. The displacement detection sensor is configured to detect both roll displacement and yaw displacement independently, allowing the control system to process each direction separately and synthesize them appropriately for different speed conditions.
Solution Approach 2:
The patent dynamically adjusts the weighting between roll direction output and yaw direction output based on vehicle speed. At low speeds, yaw direction output is prioritized (larger weight), while at high speeds, roll direction output is prioritized (larger weight). This dynamic adjustment optimizes posture control accuracy across the entire speed range.
2Ease of manufacture
If the displacement detection sensor is mounted at a fixed angle, then the installation is simple, but the detection accuracy varies at different speeds
Solution Approach 1:
The patent introduces a speed dimension to the sensor mounting angle. Instead of using a fixed mounting angle, the sensor's mounting angle is adjusted based on the vehicle speed. At low speeds, the sensor is mounted at an angle that prioritizes yaw detection, while at high speeds, the mounting angle is adjusted to prioritize roll detection, thereby optimizing measurement precision across different operating conditions.
Data Source
AI summary
A system for performing posture control of a motorcycle is such that in outputting a synthesized output by adjusting a yaw direction output and a roll direction output outputted from a displacement detection sensor by an adjustment part respectively, a synthesized output in which the yaw direction output is larger than the roll direction output is outputted when a vehicle speed is low, and a synthesized output in which the roll direction output is larger than the yaw direction output is outputted when the vehicle speed is high. Accordingly, in either a case where the vehicle is traveling at a low speed or a case where the vehicle is traveling at a high speed, the displacement and the behavior of a motorcycle 10 can be detected with high accuracy thus eventually realizing a control of the posture of the motorcycle 10 with high accuracy.