Gyroscope Attack Detection Using Accelerometer Feedback
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Solution Overview
Problem
MEMS gyroscopes in unmanned vehicles are vulnerable to acoustic signal attacks, leading to measurement errors and potential vehicle malfunctions due to their inherent structural and measurement methods, which conventional software-based protection techniques struggle to detect and defend against.
Innovation Solution
A device and method using an accelerometer to estimate angular velocity, derive a transformation equation through system identification, and compare estimated and measured values to detect attacks and recover from them by isolating erroneous gyroscope readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MEMS gyroscope is used to measure angular velocity, then measurement capability is provided, but vulnerability to acoustic signal attacks increases
Solution Approach 1:
The patent introduces an accelerometer as an intermediary sensor to detect acoustic attacks. The accelerometer measures acceleration caused by acoustic signals and uses this information to detect and compensate for attacks on the gyroscope, thereby protecting the angular velocity measurement without modifying the gyroscope itself
Solution Approach 2:
The system continuously monitors the relationship between acceleration (from accelerometer) and angular velocity (from gyroscope) to detect anomalies. When an attack is detected through feedback from the accelerometer data, the system adjusts or compensates the gyroscope measurements to maintain accuracy
2Ease of operation
If conventional software-based protection techniques are used, then ease of implementation is maintained, but detection capability against physical attacks is insufficient
Solution Approach 1:
The accelerometer serves as a physical intermediary that detects acoustic signals before they can corrupt the gyroscope measurements. This physical detection layer works in conjunction with software algorithms to provide comprehensive protection against physical attacks while maintaining ease of implementation
3Difficulty of detecting and measuring
If accelerometer-based attack detection is implemented, then attack detection capability is improved, but device complexity increases
Solution Approach 1:
The accelerometer serves multiple functions: it acts as a shock detector for general protection, an attack detector for security, and provides data for compensation algorithms. This multi-functionality justifies the addition of the sensor by providing multiple benefits from a single component
Solution Approach 2:
The system uses the accelerometer data to self-diagnose and self-correct gyroscope measurements when attacks are detected. The combination of sensors and algorithms works together autonomously to maintain measurement accuracy without requiring external intervention
Data Source
AI summary
Disclosed herein is an attack detection device for detecting an attack targeting a gyroscope. The attack detection device includes: a data collection unit configured to receive measurement values from an accelerometer and the gyroscope; and an attack detection unit configured to estimate an angular velocity using the measurement value from the accelerometer, and to detect an attack by comparing the estimated angular velocity to an angular velocity measured by the gyroscope.