So sánh phương pháp

	Dead Reckoning	Hệ thống Tham chiếu Hướng và Thái độ (AHRS)
Lĩnh vực	Hàng không vũ trụ	Hàng không vũ trụ
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1940s	1940s
Người khởi xướng	Maritime navigation tradition	Aviation heritage
Loại	Navigation method	System
Công trình gốc	Savage, P. G. (2007). Strapdown Inertial Integration Technology (2nd ed.). Strapdown Associates.	Savage, P. G. (2007). Strapdown Inertial Integration Technology (2nd ed.). Strapdown Associates.
Tên gọi khác	ded reckoning, inertial navigation, odometry	AHRS system, attitude reference, heading sensor
Liên quan	3	3
Tóm tắt	Dead Reckoning is a fundamental navigation method that estimates position and heading by integrating velocity and angular rate measurements from inertial sensors over time, without external references such as GPS. The term derives from maritime tradition ('deduced reckoning') and remains a cornerstone of aerospace and autonomous vehicle navigation. Dead reckoning works reliably in GPS-denied environments and is the baseline navigation method when external navigation aids are unavailable.	An Attitude Heading Reference System (AHRS) is a complete inertial navigation subsystem that estimates and outputs the three-dimensional orientation (attitude) and heading of a vehicle or platform. AHRS combines measurements from accelerometers, gyroscopes, and often magnetometers through sensor fusion algorithms (typically Kalman filters or complementary filters) to provide a drift-free, fast attitude estimate. AHRS is standard in aviation, marine navigation, and modern autonomous systems.