Parallel Motor Braking Robot with Force Converter
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Solution Overview
Problem
Current braking robots for vehicle testing are complex, time-consuming to install, and require multiple motors with varying outputs, leading to issues like test driver fatigue and non-uniform force application during braking tests.
Innovation Solution
A braking robot system utilizing a plurality of single-output motors connected in parallel, with a driving force converter and load sensor, controlled by a controller to apply consistent pedal effort to the brake pedal, allowing for efficient operation and calibration of motor states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex braking robot structure is used to apply braking force, then the braking test reliability is improved, but the installation time increases significantly and the structure interferes with test driver operation
Solution Approach 1:
The braking robot is divided into multiple independent motor units (first motor, second motor, etc.) that can be independently controlled and calibrated. Each motor unit has its own driving force converter, allowing modular installation and testing. This segmentation enables the system to achieve reliable braking through multiple redundant components while simplifying installation through standardized modular units.
Solution Approach 2:
Multiple motor units are combined to work together on a single brake pedal, with their forces integrated through a common mechanical linkage system. The driving force converters from multiple motors are merged to provide cumulative braking force, achieving both reliability through redundancy and simplified installation through standardized combined units.
2Adaptability or versatility
If multiple motors with various outputs are used to achieve required pedal effort, then the adaptability to different braking scenarios is improved, but the device complexity increases
Solution Approach 1:
Multiple identical motor units with the same output characteristics are used instead of motors with varying outputs. Each motor unit is universally designed to perform the same function, and the system achieves adaptability to different braking scenarios by controlling the number and activation state of motor units rather than using motors with different specifications. This reduces device complexity while maintaining versatility.
Solution Approach 2:
The system achieves different braking forces by changing the operational parameters (activation state, rotation direction, rotation speed) of identical motor units rather than using motors with different output parameters. The controller adjusts the effective braking force by selectively activating subsets of motors or modulating their individual contributions, maintaining device simplicity while providing adaptability.
3Ease of operation
If a complex braking robot structure is used, then the braking force control is improved, but the ease of operation deteriorates due to interference with test driver
Solution Approach 1:
The test driver is extracted from the braking test process entirely, replaced by an automated braking robot system that applies predetermined braking forces without human intervention. This eliminates the problems of driver fatigue and non-uniform force application while maintaining precise control through automated motor regulation. The complex control functions are embedded in the robot system rather than requiring complex interaction with a human driver.
4Adaptability or versatility
If motors with various outputs are used for different pedal effort requirements, then the adaptability to different braking test requirements is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The system uses multiple identical motor units with standardized output characteristics, making them easier to manufacture and assemble. The adaptability to different pedal effort requirements is achieved through controlling which motors are activated and how they are configured in the parallel connection, rather than manufacturing and assembling motors with different output specifications. This standardization significantly improves ease of manufacture while maintaining versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables rapid installation, consistent pedal effort application, and acquisition of motor operation states, addressing the complexity and efficiency issues of existing robots while ensuring reliable braking tests.
Implementation Method 1
a driving force converter which converts rotational forces of the motors, corresponding to the individual output powers of the motors, into a translational force and thus transmits the translational force to the motion shaft
Implementation Method 2
a load sensor, installed on the motion shaft, for detecting the pedal effort applied to the brake pedal by the motion shaft
Data Source
AI summary
A braking robot for a braking test of a vehicle is provided. The braking robot includes: a plurality of motors, having same individual output powers, combined with a robot body installed in the vehicle; a motion shaft combined with a pedal presser for applying pedal effort to a brake pedal of the vehicle; a driving force converter which converts rotational forces of the motors, corresponding to the individual output powers of the motors, into a translational force and thus transmits the translational force to the motion shaft; a load sensor, installed on the motion shaft, for detecting the pedal effort applied to the brake pedal by the motion shaft; and a controller for controlling operations of the motors by referring to (1) a scenario for the braking test and (2) information on the pedal effort detected from the load sensor.