Vehicle Acceleration Transition Control Under Communication Latency

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Solution Overview

Problem

Existing systems fail to properly set the initial acceleration for vehicle control, leading to potential discomfort due to temporary changes in vehicle acceleration caused by communication latency and misalignment between the driver-assistance system and the vehicle's current acceleration.

Innovation Solution

A control device and method that determine an initial acceleration and generate a transition acceleration to smoothly connect the vehicle's current acceleration to the requested acceleration, minimizing deviations caused by communication latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the driver-assistance system uses the current acceleration as the initial acceleration, then the system is simple to operate, but the initial acceleration may not be optimal leading to vehicle discomfort

Engineering Contradiction:

Improveease of setting initial accelerationVSAvoidvehicle acceleration smoothness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The motion manager determines the initial acceleration in advance before the driver-assistance system uses it. This preliminary determination ensures that the initial acceleration is optimal for smooth vehicle transition, rather than simply using the current acceleration which may cause discomfort. The motion manager calculates the appropriate initial acceleration based on vehicle state and control requirements before the driver-assistance system generates the requested acceleration.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If communication latency exists between the driver-assistance system and the motion manager, then the system can process information asynchronously, but temporary braking or driving forces occur causing vehicle discomfort

Engineering Contradiction:

Improveinformation processing efficiencyVSAvoidvehicle acceleration deviation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The motion manager acts as an intermediary between the driver-assistance system and the actuator control unit. It receives the requested acceleration from the driver-assistance system, determines the appropriate initial acceleration, and generates the transition acceleration that smoothly connects the initial acceleration to the requested acceleration. This intermediary role ensures that communication latency does not cause temporary braking or driving forces, as the motion manager coordinates the acceleration transition independently of communication timing.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If the system directly outputs the requested acceleration to the actuator, then the control process is simple and fast, but the vehicle acceleration changes abruptly causing discomfort

Engineering Contradiction:

Improvecontrol process complexityVSAvoidacceleration transition smoothness

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The motion manager determines the initial acceleration in advance before generating the transition acceleration. This preliminary determination of the starting point for acceleration modification ensures that the transition from initial acceleration to requested acceleration is smooth and does not cause abrupt changes. The motion manager calculates the transition acceleration that connects the initial acceleration to the requested acceleration, ensuring smooth vehicle acceleration transition.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the acceleration transition by generating a transition acceleration that connects the initial acceleration to the requested acceleration. Rather than directly outputting the requested acceleration, the motion manager creates a dynamic transition process that modifies the vehicle acceleration smoothly from the initial value to the target value, reducing abrupt changes and improving ride comfort.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250381956A1Control device for vehicle, storage medium, and control method

Publication Date: 2025.12.18 TOYOTA JIDOSHA KK

AI summary

A control device for a vehicle, a storage medium, and a control method are provided. Processing circuitry is configured to receive a requested acceleration from a driver-assistance system of a vehicle and determine an initial acceleration. The initial acceleration is a starting point for modifying a vehicle acceleration toward the requested acceleration. The processing circuitry is configured to generate a transition acceleration that connects the initial acceleration to the requested acceleration and output, based on the transition acceleration, an instruction signal that is used to control an actuator of the vehicle.