Vehicle Speed Trap Control Using Distance-Based Target Speed
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Solution Overview
Problem
Existing speed control systems in speed traps unnecessarily decelerate vehicles even when there is a sufficient remaining distance, leading to inefficient energy use and user discomfort.
Innovation Solution
An apparatus and method for controlling vehicle speed in speed traps, which calculates the required acceleration based on the traveling distance, average speed, and speed limit, allowing the vehicle to maintain a stable speed and efficiently use energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speed of the vehicle is controlled to be the speed limit or lower regardless of remaining distance, then the average speed of the vehicle is equal to or less than the speed limit, but energy is consumed inefficiently and the user feels disharmony
Solution Approach 1:
The system calculates the required acceleration in advance based on the remaining distance of the speed trap and the current average speed, allowing the vehicle to maintain optimal speed without unnecessary deceleration and re-acceleration cycles
Solution Approach 2:
The speed control system dynamically adjusts the target speed based on real-time parameters including remaining distance, current average speed, and calculated required acceleration, rather than applying a static speed limit threshold
2Reliability
If the speed of the vehicle is controlled to be the speed limit or lower, then the average speed compliance is achieved, but the vehicle cannot rapidly move and the user experience is degraded
Solution Approach 1:
The system dynamically determines the target speed by considering the remaining distance and calculating the required acceleration, allowing the vehicle to maintain higher speeds when feasible while still achieving average speed compliance by the end of the speed trap
Solution Approach 2:
The control system changes the target speed parameter based on multiple inputs including remaining distance, current average speed, and calculated acceleration requirements, rather than maintaining a fixed speed limit
3Reliability
If the vehicle is unnecessarily decelerated when average speed is already equal to or less than the speed limit, then the average speed compliance is maintained, but the user feels disharmony and energy efficiency deteriorates
Solution Approach 1:
The system continuously monitors the current average speed and remaining distance, using this feedback to determine whether deceleration is actually necessary to maintain compliance, thereby avoiding unnecessary speed adjustments that would discomfort the user
Data Source
AI summary
In an embodiment an apparatus for controlling a speed of a vehicle includes a communication device configured to receive at least one of a starting point of a speed trap, an end point of the speed trap, a speed limit in the speed trap, an average speed of the vehicle, a traveling distance from the starting point of the speed trap of the vehicle, or a present speed of the vehicle, a target speed setting device configured to set a target point, set a starting point for a target speed, and calculate the target speed, a required acceleration calculating device configured to calculate a required acceleration, and a controller configured to control the vehicle, based on at least one of the calculated target speed or the calculated required acceleration.