Autonomous underwater vehicles (AUV) are used for for deep-sea exploration. The AUV’s thrusters, which control speed, direction, and maneuverability, must operate efficiently various pressure and resistance conditions found in the ocean environment. An accurate system is needed to analyse the subtle variations in thrust performance across different load conditions.
Observing torque fluctuations in varying water resistance
Conducting torque performance evaluations of AUV thrusters under simulated underwater load conditions
What torque measurement challenges do AUV thrusters face underwater?
How does a rotary torque transducer help measure underwater thruster load changes?
Interface recommends the T2 Ultra Precision Shaft Style Rotary Torque Transducer paired with the SI-USB4 4-channel USB Interface Module. The T2 measures torque during thruster operation, allowing engineers to observe fluctuations in torque as the propellers encounter varying water resistance. The SI-USB4 4-channel USB Interface Module enabled real-time data acquisition, visualisation, and recording directly on a laptop or desktop computer.
What insights can engineers gain from analysing torque fluctuations in water resistance?
Using Interface’s torque transducer and data acquisition system, the engineering team successfully conducted precise torque performance evaluations of the AUV thrusters under simulated underwater load conditions.
What equipment is needed for accurate AUV thrust performance analysis?
How is a torque transducer installed on an AUV thruster system?
- The T2 Ultra Precision Shaft Style Rotary Torque Transducer is installed inline between the AUV’s thruster motor and the propeller assembly. This placement allows the T2 to directly measure the torque output generated by the motor as it drives the propeller under test conditions.
- The motor is powered on to simulate propulsion conditions similar to those experienced underwater. As the motor drives the propeller, the T2 continuously measures the torque being applied through the shaft.
- When connected to a computer, the SI-USB4 4-channel USB Interface Module can monitor and display the results of the torque.
Autonomous underwater vehicles – Find out more
- Read our article “Torque Transducers Review Plus Glossary of Torque Terms“.
- Read: “The future of automotive performance requires precise torque measurement“.
- Product information:
- Please get in touch to discuss how we can help with your next project.
Autonomous underwater vehicles – FAQs
What is a rotary torque transducer?
A rotary torque transducer is a sensor designed to measure rotational force (torque) on a spinning shaft. It provides precise, real-time torque data during motion, which is essential for analysing motors, thrusters, and drive systems in engineering applications.
Why do AUVs need torque measurement during thruster testing?
AUVs operate in environments with constantly changing water resistance. Measuring torque helps engineers understand how thrusters behave under different load conditions, improve propulsion efficiency, diagnose performance issues, and design more reliable underwater systems.
How does water resistance affect AUV thruster torque?
As an AUV propeller moves through water, the density and pressure of the environment create varying resistance. These changes can cause fluctuations in torque output. Monitoring these fluctuations helps engineers optimise thrust, energy consumption, and control stability.
What does the T2 Ultra Precision Shaft Style Rotary Torque Transducer measure?
The T2 measures the real-time torque produced by a rotating shaft — in this case, the torque output from an AUV thruster motor. It captures precise variations in rotational force, even under dynamic or rapidly changing load conditions
How is the SI-USB4 4-channel USB Interface Module used in testing?
The SI-USB4 connects sensors such as torque transducers to a laptop or PC. It allows engineers to acquire, visualise, and record torque data instantly. This is useful for analysing performance trends, validating prototypes, and producing detailed test reports.
How is a torque transducer installed in an AUV thruster setup?
The transducer is mounted inline between the thruster motor and the propeller assembly. This configuration ensures that all torque flowing from the motor to the propeller passes through the sensor, providing accurate measurement of real operating conditions.
What data do engineers gain from torque testing AUV thrusters?
Engineers can evaluate:
- Efficiency under different loads
- Propulsion performance
- Motor strain and mechanical stress
- How underwater pressure affects torque output
- Opportunities to improve thruster design or control systems
What equipment is required for AUV torque performance analysis?
A standard setup includes:
- A T2 Ultra Precision Rotary Torque Transducer
- An SI-USB4 4-channel USB Interface Module
- A test PC or laptop
- The AUV thruster motor and propeller assembly
Interface Force Solutions
Interface Force Measurements Ltd is a UK-based engineering specialist in force, torque, and pressure measurement systems. As the master distributor and technical centre for Interface load cells across the UK, Ireland, the Middle East, and North Africa, we do far more than simply supply products — we design, build, and support complete measurement solutions tailored to customer applications.
Our newly established UK calibration laboratory represents a major investment in UK capability. It enables us to provide comprehensive in-house calibration, testing, and verification services, to our customers. While ensuring every solution we deliver meets the highest international standards. This facility reinforces our commitment to supporting UK industry with precision, reliability, and fast turnaround times.
Working with world-class partners such as Interface, DDM Sensor Solutions, AMTI Force Measurement Systems, GP:50 Pressure Sensors, and XSENSOR Intelligent Dynamic Sensing, we integrate cutting-edge transducers, sensors, and instrumentation into fully engineered systems.
All of our partners share our values of quality, reliability, and customer focus. Whether you need a standard transducer, a custom-designed force measurement system, or complete system calibration and support, Interface Force Measurements provides manufacturer-grade solutions with UK-based technical expertise and service.