Robot Head Rotation for Creature-Like Motion Expression
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Solution Overview
Problem
Existing robots lack the ability to express a sense of creature-like behavior and interaction, particularly in terms of head movement and emotional responsiveness, which limits their engagement and interaction with users.
Innovation Solution
A robot design featuring a head part capable of independent rotation about two axes, combined with sensors and motors for gesture and sound production, along with a processor for controlling these movements and emotional responses based on detected stimuli, allowing for a range of creature-like behaviors and emotional expressions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the robot uses simple motor-driven leg movement and tail wagging, then the structure remains simple, but the ability to express creature-like behavior and emotional responsiveness is limited
Solution Approach 1:
The head part is divided into multiple independently controllable segments that can rotate about two different axes. This segmentation allows the robot to express a variety of creature-like behaviors through coordinated movement of different head segments, enhancing behavioral versatility while maintaining manageable structural complexity through modular design
Solution Approach 2:
The head part is designed with dynamic movement capabilities, allowing it to rotate about a first axis and a second axis independently. This dynamic structure enables the robot to exhibit natural creature-like behaviors such as head bobbing, turning, and positioning, significantly improving emotional responsiveness and interaction quality
2Adaptability or versatility
If the robot implements independent dual-axis rotation of the head part, then emotional responsiveness and interaction quality improve, but the drive unit complexity and control difficulty increase
Solution Approach 1:
The drive unit is designed with multi-functionality, where a single drive mechanism can control rotation about both the first axis and the second axis. This universal drive approach allows the robot to perform multiple emotional expressions and head movements using one integrated system, reducing overall drive unit complexity while maintaining high emotional responsiveness
Solution Approach 2:
A processor acts as an intermediary between the control system and the dual-axis rotation mechanism. The processor coordinates the complex control signals for independent rotation about two axes, managing the drive unit's complexity by providing intelligent signal processing and motion coordination that enables natural emotional expressions
3Adaptability or versatility
If the robot uses alternating forward and reverse rotation for vibration effect, then creature-like behavior expression improves, but the energy consumption increases
Solution Approach 1:
The robot employs periodic alternating forward and reverse rotation of the head part to create vibration effects that mimic creature-like behaviors. This periodic action allows the robot to express various gestures and emotions through rhythmic movements, maximizing gesture variety while optimizing energy consumption by using efficient oscillation patterns rather than continuous rotation
Data Source
AI summary
A robot includes an exterior, a casing provided inside the exterior, and a hardware processor configured to control operation of the casing inside the exterior. The casing includes a head part and a body part, and the hardware processor performs control to express a trembling motion by repeatedly causing a twisting motion of the casing inside the exterior around a rotation axis at a connection point between the body part and the head part, in a state where at least part of the robot is in contact with a placement surface.