Vehicle Motion Control Architecture for Faster Route Response
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Solution Overview
Problem
Automated driving systems face delays in calculating vehicle routes due to processing vast outdoor environment information, leading to decreased responsiveness of traveling devices to environmental conditions.
Innovation Solution
A vehicle travel control device configuration where computation circuitry identifies the outdoor environment and sets a route, while a device controller calculates and outputs control signals to traveling devices, reducing computation load and enhancing processing speed and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single computation device calculates both the route and controlled variables of traveling devices, then the system structure is simple, but the calculation time increases and responsiveness degrades
Solution Approach 1:
The patent divides the computation device into two distinct functional units: a route calculation unit that processes outdoor environment information to determine the vehicle route, and a controlled variable calculation unit that computes the controlled variables for traveling devices based on the determined route. This segmentation allows parallel processing of route determination and device control calculations, thereby improving overall system responsiveness while maintaining manageable structural complexity.
2Ease of operation
If a single computation device processes all calculation tasks, then the system is easier to manage, but the calculation speed decreases due to enormous computation load
Solution Approach 1:
The computation device is segmented into specialized units with distinct responsibilities: the route calculation unit focuses on processing outdoor environment information and determining optimal routes, while the controlled variable calculation unit specializes in computing precise control parameters for traveling devices. This functional segmentation enables each unit to optimize its processing efficiency for specific tasks, thereby increasing overall calculation speed while maintaining systematic manageability through clear division of labor.
3Device complexity
If one computation device calculates all parameters, then the system architecture is simplified, but the time to output control signals increases
Solution Approach 1:
The patent implements a segmented computation architecture where the route calculation unit and controlled variable calculation unit operate as separate but coordinated components. The route calculation unit first determines the vehicle route based on outdoor environment information, then passes this information to the controlled variable calculation unit which immediately computes the necessary control parameters. This sequential yet parallelized approach reduces the total time required to generate control signals compared to a single-device sequential processing architecture.
Data Source
AI summary
A vehicle travel control device includes computation circuitry, and a device controller that controls actuation of a traveling device mounted on a vehicle, based on a result from the computation circuitry. The computation circuitry identifies a vehicle outdoor environment based on an output from image circuitry that acquires image information of vehicle outdoor environment, sets a route on which the vehicle is to travel, in accordance with the vehicle outdoor environment previously identified, determines a target motion of the vehicle to follow the route previously set, calculates a target physical quantity to be executed by the traveling device to achieve the target motion previously determined, and calculates a controlled variable of the traveling device such that the target physical quantity calculated is achieved, and the device controller outputs a control signal to the traveling device so as to control the traveling device to control a motion of the vehicle.