Inertia-Shifting Robot Assembly for Midair Spin Control
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Solution Overview
Problem
Current robotic systems face challenges in accurately controlling the spin and orientation of robots during flight or fall, particularly at high speeds, leading to complex and costly designs that are not entirely successful in achieving precise landings.
Innovation Solution
A robot equipped with an inertia shifting assembly, including sensors and a drive mechanism, that allows for internal control of spin by shifting inertia within the robot's body, using movable weights and a controller to adjust the moment of inertia during flight, enabling precise orientation and pose control upon landing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex robotic devices with tails or legged mechanisms are used to control orientation during flight, then spin control capability is improved, but device complexity and cost increase
Solution Approach 1:
The robot is divided into modular components: a fixed body housing and movable inertia elements (weights) that can be independently positioned. This segmentation allows the inertia control function to be separated from the main body, enabling precise spin control without requiring complex integrated mechanisms like tails or legged structures.
Solution Approach 2:
The system changes the moment of inertia parameter dynamically by moving weights between different positions within the body. By adjusting this physical parameter during flight, the robot can control its spin rate and orientation without requiring complex mechanical structures, thus simplifying the overall device while maintaining reliable spin control.
2Reliability
If traditional inertia control methods are used, then spin control is achieved, but power consumption increases
Solution Approach 1:
The inertia control system operates periodically rather than continuously - weights are moved to adjust spin characteristics only when needed during specific phases of flight, then remain stationary. This periodic operation significantly reduces power consumption compared to continuous active control mechanisms while maintaining accurate spin control when required.
Solution Approach 2:
The movable weights utilize the robot's own motion and existing structural components to achieve inertia control. The weights are positioned along rails or guides that are part of the robot's existing structure, and their movement leverages the robot's flight dynamics rather than requiring additional power-intensive active control systems.
3Speed
If high spin rates are used during flight for exciting entrance, then entertainment value is improved, but control precision upon landing deteriorates
Solution Approach 1:
The system dynamically adjusts the moment of inertia during flight to control spin characteristics. By moving weights to different positions, the robot can tolerate high initial spin rates from the launch mechanism and then actively control the spin down or orientation adjustment during flight to achieve precise landing orientation. This dynamic adaptation allows high spin rates without sacrificing landing precision.
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 robots to tumble through the air at high speeds and spin rates, allowing for accurate control of orientation and pose, reducing complexity and power requirements compared to traditional methods, and successfully achieving target orientations with high consistency.
Implementation Method 1
a drive mechanism that operates in response to the control signal to shift the moment of inertia of the robot so as to modify rotation during the freefall
Implementation Method 2
The inertia shifting assembly includes sensors that allow the distance from the landing surface (or height) to be determined and that allow other parameters useful in controlling the robot to be calculated such as present orientation. In one embodiment, the sensors include an inertial measurement unit (IMU)
Data Source
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AI summary
A robot configured to provide accurate control over the rate of spin or rotation of the robot. To control the rate of spin, the robot includes an inertia shifting (or moving) assembly positioned within the robot's body so that the robot can land on a surface with a target orientation and "stick the landing" of a gymnastic maneuver. The inertia shifting assembly includes sensors that allow the distance from the landing surface (or height) to be determined and that allow other parameters useful in controlling the robot to be calculated such as present orientation. In one embodiment, the sensors include an inertial measurement unit (IMU) and a laser range finder, and a controller processes their outputs to estimate orientation and angular velocity. The controller selects the right point of the flight to operate a drive mechanism in the inertia shifting assembly to achieve a targeted orientation.