Yearly Archives: 2021

Custom 3-Axis Satellite Antenna Rocking Test Platform A three-axis turntable for antenna tracking, inclination and marine rocking tests. Reference Motion Roll 0 to ±45°; 3–14 s period Pitch 0 to ±15°; 3–14 s period Yaw rocking 0 to ±4°; 3–14 s period Static transverse inclination 0 to ±45° Static longitudinal inclination 0 to ±15° Reference tests run for at least 60 minutes. The Chinese configuration references GB/T 2423.101, GJB 150.23 and GJB 150.23A; final compliance and tolerances depend on the…

3-DOF Satellite Antenna Test Turntable Design A customizable three-degree-of-freedom turntable for satellite-antenna tracking, three-axis attitude and marine rocking tests. Custom Engineering Payload and center-of-gravity height Roll, pitch and yaw range Speed, acceleration and test period Platform dimensions and antenna interface Control, data recording and third-party communication Indoor, marine and environmental protection options Detailed drawings are supplied after the technical requirements and commercial scope are confirmed.

Forward and Inverse Kinematics for 3-DOF and 6-DOF Platforms Forward Kinematics Forward kinematics estimates the platform’s position and orientation from measured actuator lengths and the geometry of the upper and lower joints. For a Stewart platform, the resulting equations are highly nonlinear, so numerical methods such as Newton–Raphson are commonly used to iteratively approach a solution. Inverse Kinematics Inverse kinematics starts with the requested platform pose and calculates the length required from each actuator. It is generally more direct and…

Inverse Kinematics for 3-DOF and 6-DOF Motion Control A platform pose is described by translation along X, Y and Z and rotation about those axes. For a Stewart platform, inverse kinematics calculates the six actuator lengths required to produce a requested pose. Calculation Outline Define the six upper and lower joint coordinates in their local frames. Build the rotation matrix and translation vector for the requested pose. Transform each upper joint into the base coordinate frame. Calculate the distance from…

Washout Algorithms for 6-DOF Motion Platforms A washout, or motion-cueing, algorithm converts simulated acceleration and angular-rate data into platform commands while keeping the mechanism inside its limited physical workspace. How It Works Scales and coordinates incoming vehicle-motion signals Uses high-pass components to reproduce short acceleration cues Uses tilt coordination to create sustained acceleration perception within safe angular limits Returns the platform gradually toward its neutral position without creating a noticeable false cue Applies workspace, velocity, acceleration and comfort limits Why…

Multi-DOF Motion Controller A multi-axis controller receives high-level pose or trajectory commands, performs kinematic and trajectory calculations, and sends synchronized position, velocity or torque commands to the servo drives. Encoder and sensor feedback closes the control loops and provides system monitoring. Core Functions Coordinated multi-axis interpolation and trajectory generation Forward and inverse kinematics Deterministic real-time control and rapid command response Workspace, actuator and joint-limit protection Homing, initialization, emergency stop and fault handling Data logging, live curves and human-machine interface Interfaces…

Shipborne Multi-DOF Satellite Antenna Rocking Platform A configurable platform for antenna tracking tests, vessel-motion reproduction, equipment evaluation and marine-environment simulation. Control Functions Independent and coordinated multi-axis positioning Sine, script, wave and recorded-profile reproduction Test-data logging and real-time curves TCP/IP third-party control Synchronization input and output Optional actuator-length, drive-state and pose monitoring Payload, number of axes, angular range, linear travel, period, accuracy and antenna mounting are customized.

6-DOF Marine Antenna Signal-Reception Test Platform A high-precision motion platform for reproducing vessel attitude and evaluating antenna tracking, signal reception and stabilization performance. The referenced configuration provides displacement positioning accuracy of 0.05 mm. Capabilities Heave, surge, sway, pitch, roll and yaw Single-axis, coordinated, sine and scripted motion Recorded wave and random-profile reproduction Data recording and real-time visualization TCP/IP third-party control and synchronization interfaces Payload, angular range, travel, period, accuracy and antenna interface are finalized from the approved test requirements.

3-Axis Radar and Automatic-Tracking Antenna Test Turntable A three-axis rocking and inclination system for radar antennas, automatic satellite-tracking equipment and marine-installed products. Reference Motion Roll 0 to ±45°; 3–14 s period Pitch 0 to ±15°; 3–14 s period Yaw rocking 0 to ±4°; 3–14 s period Static transverse inclination 0 to ±45° Static longitudinal inclination 0 to ±15° The Chinese test configuration references GB/T 2423.101, GJB 150.23 and GJB 150.23A. Final compliance, accuracy and duration depend on the approved project…

6-DOF Wireless Charging Coil Test Platform A multi-axis positioning system for studying wireless charging efficiency under controlled coil displacement and angular misalignment. Functions Independent and coordinated six-axis positioning Sine and scripted test trajectories Test-data logging and live plots TCP/IP third-party control Synchronization input and output Optional actuator-length, drive-state and pose monitoring Coil fixtures, payload, travel, angle, measurement sensors, electrical safety and communication interfaces are customized to the test plan.

Real-Time 6-DOF Forward and Inverse Kinematics Control Our motion-platform projects can include self-developed forward- and inverse-kinematics algorithms for real-time six-axis control. Inverse kinematics converts target platform pose into actuator lengths; forward kinematics estimates the actual platform pose from measured actuator positions. Software Functions Pose and coordinated multi-axis commands Single-axis, sine and scripted motion Road, wave, flight and random-profile reproduction Data recording and real-time plotting TCP/IP control and synchronized data interfaces Actuator status and optional pose reconstruction Algorithm delivery, source-code scope,…

0.5 g 6-DOF Instrument Test Platform A servo-electric platform for instrument testing, attitude simulation and recorded-profile reproduction, with a referenced acceleration capability of 0.5 g. Capabilities Independent and coordinated six-axis motion Position, velocity, sine and data-script commands Road, wave, flight and random profiles Test-data recording and real-time curves TCP/IP third-party interface and synchronization I/O Optional actuator and pose monitoring Payload, acceleration, frequency, stroke, angle, accuracy and fixture design are confirmed for the required instrument test.