Wind Force Estimation for Small Moving Body Control
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Solution Overview
Problem
Existing techniques for controlling small moving bodies, such as multirotor helicopters, lack accurate methods for perceiving the influence of wind, particularly in terms of wind direction and strength, which affects movement control.
Innovation Solution
A data processing device equipped with wind sensors and image devices that measure wind direction and strength, and a data processing system that calculates the propulsive force and attitude of the moving body to accurately estimate the external forces from wind, using a combination of sensor data and control signals to adjust the movement control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wind sensors and image devices are used to measure wind direction and strength, then measurement precision of wind parameters is improved, but device complexity increases
Solution Approach 1:
The patent combines wind sensors and image devices into an integrated measurement system that simultaneously captures wind direction, wind strength, and visual information. This merging allows multiple measurement functions to be achieved through a coordinated system rather than separate independent systems, improving overall measurement precision while managing device complexity through functional integration.
Solution Approach 2:
The image device serves multiple functions: it captures visual information for navigation, measures wind direction through image analysis, and provides data for estimating external forces. This multi-functionality reduces the need for dedicated specialized sensors for each measurement type, thereby improving measurement capabilities without proportionally increasing device complexity.
2Reliability
If a data processing system calculates propulsive force and attitude to estimate external forces, then reliability of wind influence perception is improved, but device complexity increases
Solution Approach 1:
The data processing system continuously calculates propulsive force and attitude information, estimates external forces including wind influence, and uses this feedback to adjust movement control in real-time. This closed-loop feedback mechanism improves the reliability of wind influence perception by constantly monitoring and adjusting based on actual measured data rather than relying on predetermined formulas.
Solution Approach 2:
The patent replaces traditional mechanical wind measurement methods with a data processing system that uses sensor data, propulsive force calculations, and attitude information to estimate external forces. This substitution of mechanical direct measurement with computational estimation improves reliability by integrating multiple data sources while managing complexity through software-based processing.
3Ease of operation
If predetermined aerodynamic formulas are used to derive control signals, then ease of operation is improved, but measurement precision of wind influence is worsened
Solution Approach 1:
The system transitions from static predetermined aerodynamic formulas to dynamic real-time calculations based on actual measured wind data, propulsive force, and attitude. This dynamic approach allows the control system to adapt to changing wind conditions and actual flight parameters, improving measurement precision of wind influence while maintaining ease of operation through automated processing.
Solution Approach 2:
The patent changes the parameters used for control signal derivation from fixed aerodynamic formula parameters to actual measured parameters including wind direction, wind strength, propulsive force, and attitude. This parameter change allows the system to reflect actual wind influence more accurately while the automated processing maintains operational ease.
Data Source
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AI summary
The present invention determines, with a high degree of accuracy, the magnitude of influence exerted by wind on a moving body from information acquired from the moving body. This data processing device is provided with: an acceleration acquisition unit that acquires the acceleration of a moving body equipped with a mechanism for generating a propulsion force and equipped with a measuring instrument for measuring the strength of at least a one-direction component of the wind to which the moving body is exposed; a wind information acquisition unit that acquires wind information indicating the blowing direction of the wind and the strength of the wind, both of which are identified from the values measured by the measuring instrument; an external force estimation unit that estimates, on the basis of the acceleration and the direction and magnitude of the propulsion force, the magnitude of an external force exerted by the wind on the moving body; and a generation unit that generates relational information indicating the relation between the wind strength and the estimated magnitude of the external force.