Remote Vehicle Control System with Steering-Based Speed Correction
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Solution Overview
Problem
Remote vehicle operation systems face challenges in maintaining smooth control and operability due to the operator's inability to directly feel changes in vehicle speed and acceleration, leading to abrupt acceleration or deceleration, and delays in recognizing changes in the vehicle's condition, which can result in poor steering and increased risk of collisions.
Innovation Solution
The system corrects the accelerator input value based on the absolute value of the steering angle and speed, and adjusts for delay time, allowing the operator to focus on steering by reducing the speed during turns and accounting for communication delays, thereby improving vehicle control and reducing abrupt changes in speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the operator directly controls the accelerator without correction, then the response speed is fast, but the vehicle speed changes abruptly causing poor operability
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the accelerator input value based on steering angle and delay time parameters. When the steering angle exceeds a threshold or delay time increases, the system automatically reduces the accelerator input value to prevent abrupt speed changes, thereby improving operability while maintaining responsive control.
2Measurement precision
If the operator focuses on steering control, then the steering precision is improved, but the speed control becomes less attentive leading to abrupt acceleration
Solution Approach 1:
The system implements self-service by automatically monitoring and correcting the accelerator input value based on steering angle and delay time conditions. This allows the operator to focus on steering while the system autonomously manages speed control reliability by reducing accelerator input when turning conditions are detected, preventing abrupt acceleration without requiring operator attention.
3Measurement precision
If the system accounts for communication delay, then the control accuracy is improved, but the complexity of the control system increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing correction rules for accelerator input based on steering angle thresholds and delay time conditions. The system proactively reduces accelerator input when these conditions are met, compensating for communication delays before they cause control inaccuracies. This approach improves control accuracy through a relatively simple conditional correction mechanism rather than complex real-time compensation algorithms.
Data Source
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AI summary
A vehicle remotely operated by an operator includes a communication part that receives, in response to an operation performed by the operator, a vehicle operation signal including an accelerator input value, a steering angle sensor that measures a steering angle of the vehicle, a speed sensor that measures a speed of the vehicle, and a controller that corrects the accelerator input value such that in a case where the absolute value of the steering angle is greater than or equal to a particular angle and the speed is greater than 0, the accelerator input value is corrected so as to reduce the speed to a value smaller than when the absolute value of the steering angle is smaller than the particular angle and the speed is greater than 0.