The three-axis turntable is a high-precision testing equipment, whose core function is to simulate and reproduce various posture and angular movements of objects in real three-dimensional space in the laboratory. It provides precise and controllable angular motion around three degrees of freedom for the tested equipment (such as inertial navigation systems, gyroscopes, accelerometers, guidance heads, etc.) installed on the table through three mutually perpendicular rotation axes.

Its basic working principle is based on the classical Euler angle concept, which simulates any attitude in space through the sequential rotation of three frames: the outer frame (square axis), commonly referred to as the "azimuth axis" or "yaw axis". This axis is vertical and is responsible for driving the middle frame and inner frame to rotate together in the vertical direction, simulating the yaw motion of the measured object in the horizontal plane. Mid frame (downward axis): Installed inside the outer frame, its rotation axis is horizontal. It is responsible for driving the inner frame to rotate around the horizontal axis, simulating the pitch motion of the measured object. Inner frame (rolling axis): Installed inside the middle frame, its rotation axis is perpendicular to the middle frame axis and fixed to the tabletop.

It directly drives the table to rotate around the axis, simulating the rolling motion of the measured object. These three axes are orthogonal to each other in the mechanical structure and intersect at a point called the "center point" or "test center". This design ensures that the sensitive center of the tested equipment can always be aligned with the center of the turntable when it moves, thereby obtaining the most accurate test data. During operation, the control system receives instructions (such as target attitude angle or angular velocity), drives three axes separately through servo motors, and moves in a specific sequence (such as "yaw pitch roll" sequence) to accurately position the tested equipment to the designated spatial attitude.

Through this method, the three-axis turntable can realistically simulate the complex flight postures of aircraft, missiles, satellites, etc. in the air on the ground, thereby completing the calibration, testing, and verification of inertial components and navigation systems. The essence of a three-axis electric turntable is a three-dimensional spatial attitude simulator, which combines the rotational movements of three single axes through a precise mechanical structure and control system, providing an indispensable experimental platform for the research and testing of high-end equipment.