Two-axis turntable calibration mainly involves two methods: inertial navigation system calibration, and temperature and position calibration with compensation. Depending on the calibration object and testing requirements, dedicated millimeter-wave radar production line calibration turntables or integrated turntable calibration software can be used. These methods and systems are designed to measure turntable motion accuracy and calibrate and compensate for relevant inertial navigation system parameters.
Main Calibration Methods for Two-Axis Turntables
Two-axis turntable calibration involves evaluating the operating condition of the inertial navigation system, angular position parameters, and temperature variations. Two commonly used methods are described below.
Inertial Navigation System Calibration
This method requires the inertial navigation system to be securely mounted on the two-axis turntable. Cables connect the turntable and the inertial navigation system to an electronic device running the calibration software.
During calibration, the system collects relevant parameters from both the turntable and the inertial navigation system. These include angular position accuracy, repeatability, and resolution, as well as motion parameters such as angular rate and swing.
The calibration software then controls the two-axis turntable according to a predefined procedure while collecting test data from both systems. It performs the calibration calculations using methods specified in applicable national military standards. The software can also record and back up the collected data. Once the calculations are complete, an external printer can be connected to produce the final calibration report.
Temperature and Position Calibration with Compensation
This method uses a pre-established calibration model for the two-axis gyroscope and accelerometer to measure and compensate for inertial navigation system parameters under different temperature and angular position conditions.
During operation, a temperature-controlled two-axis turntable automatically rotates to preset angular positions. The system reads and verifies the corresponding temperature points, then collects test data at different temperatures and positions. The collected data is processed through calculation to determine the relevant parameters. The system then automatically completes the calibration and compensation of the inertial navigation system, helping improve navigation accuracy.
Common Calibration Equipment for Two-Axis Turntables
Depending on the calibration object and application, two-axis turntables can be tested using dedicated mechanical calibration equipment or integrated software systems for testing and data processing.
Millimeter-Wave Radar Production Line Calibration Turntable
A millimeter-wave radar production line calibration turntable mainly consists of an enclosure, a front-mounted collimator, and a two-axis turntable installed inside the enclosure.
The turntable has two calibration positions: horizontal and vertical. Each position is equipped with a rotary-shaft motor. The output shafts of the two motors are arranged in a cross configuration, with their axes perpendicular to each other. The collimator is positioned perpendicular to the intersection of the two output shafts.
During calibration, the equipment performs measurements in the horizontal and vertical directions using the two calibration positions. A mandrel can also be fixed to the motor so that it rotates synchronously with the shaft. This arrangement allows the rotational accuracy of the yaw and pitch angles to be calibrated, improving measurement consistency and accuracy.
Turntable Calibration Software
Turntable calibration software is used to control calibration procedures, collect test data, and calculate relevant parameters. It can be installed on electronic devices such as industrial control computers, standard desktop computers, and portable laptops. It can also be stored on general-purpose storage media.
The software supports calibration of several types of turntables, including single-axis, two-axis, and three-axis turntables, as well as position-rate turntables. It performs the corresponding testing and data processing according to the turntable configuration.
Custom Machining of Precision Parts for Two-Axis Turntables
Two-axis turntables and their calibration equipment typically contain mounting brackets, connecting structures, and other precision mechanical components. Their dimensions and machining requirements depend on the equipment structure, assembly interfaces, and design drawings. Hansheng Automation provides custom precision machining based on customer drawings and accepts both single-piece and small-batch orders.
Our machining services also cover precision components for yachts and RC racing cars, as well as parts for tobacco packaging machinery and filling equipment. Components are manufactured according to the structural requirements and drawings provided for each project.
