Vehicle Operation Device Dynamic Reaction Force Control
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Solution Overview
Problem
Existing vehicle operation devices fail to provide an optimal operation reaction force that matches the driver's ergonomic conditions, as they do not consider the muscle viscosity characteristic of the driver, leading to inconsistent operation feelings.
Innovation Solution
An operation device for a vehicle that includes a displacement speed detection unit, a reaction force application unit, and a control unit that adjusts the operation reaction force based on the detected displacement speed and muscle viscosity characteristic, ensuring a consistent load and improved operation feeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operation reaction force is increased to prevent erroneous operations, then the click feeling is improved, but the operation feeling becomes heavy and operation delay occurs
Solution Approach 1:
The operation device dynamically adjusts the operation reaction force based on the displacement speed of the operation unit. When displacement speed exceeds a threshold, the reaction force increases to provide click feeling and prevent erroneous operations. When displacement speed is within normal range, the reaction force remains at a baseline level to maintain comfortable operation feeling.
Solution Approach 2:
The system changes the parameter of operation reaction force according to the displacement speed parameter. By monitoring displacement speed and adjusting the reaction force parameter accordingly, the system achieves both reliable operation detection and comfortable operation feeling without the trade-off present in conventional fixed reaction force systems.
2Ease of operation
If the operation reaction force is decreased to improve operation feeling, then the operation feeling becomes light, but overshooting occurs
Solution Approach 1:
The operation device dynamically adjusts the operation reaction force based on the displacement speed of the operation unit. When displacement speed exceeds a threshold, the reaction force increases to provide click feeling and prevent erroneous operations. When displacement speed is within normal range, the reaction force remains at a baseline level to maintain comfortable operation feeling.
Solution Approach 2:
The system uses displacement speed detection as feedback to adjust the operation reaction force. The displacement speed detection unit continuously monitors the speed of operation unit movement and provides feedback to the control unit, which then adjusts the reaction force application accordingly, creating a closed-loop control system that prevents overshooting while maintaining operation accuracy.
3Reliability
If the operation reaction force is adjusted based on travel state, then the click feeling is improved in high-speed state, but the muscle viscosity characteristic of the driver is not considered
Solution Approach 1:
The system changes the parameter of operation reaction force according to the displacement speed parameter. By monitoring displacement speed and adjusting the reaction force parameter accordingly, the system achieves both reliable operation detection and comfortable operation feeling without the trade-off present in conventional fixed reaction force systems.
Data Source
AI summary
An operation device in which in-vehicle devices are controlled in accordance with a rotation angle of an input unit operated by a manual operation of a driver, which includes a commander rotatable about a rotation shaft, a rotation angular speed calculation unit that detects a rotation angular speed of the commander, a motor that gives an operation reaction force for each predetermined rotation angle of the commander, and an ECU that controls the operation reaction force given by the motor, wherein the ECU changes the operation reaction force in accordance with the rotation angular speed detected by the rotation angular speed calculation unit.