Rotortuner HT-DASU

The Helitune Data Acquisition and Storage Unit (HT-DASU) combines continuous vibration acquisition for up to 64 channels and measurements from multiple digital interfaces, providing an all-encompassing HUMS solution for medium and heavy lift helicopters.

HT-DASU was a key component in the development of the ZF Luftfahrttechnik (ZFL) In-Flight Tuning (IFT) solution. This ground-up product development combines the latest technologies to produce a highly flexible and modular architecture, ideally suited for new applications as well as addressing third-party HUMS component obsolescence.

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HT-DASU is a permanent fit HUMS solution for helicopters. The self-contained unit, interfaces with multiple sensor inputs ranging from oil temperature pickups to high-frequency vibration transducers. 

Flexible build options are available from 16 to 64 analogue input channels. Digital interfaces are also provided to record parameters from data buses such as MIL-STD-1553 and ARINC-429. 

Traditional HUMS systems are held back by their inability to capture data from all measurement sensors at once. HT-DASU pioneers a new architecture that measures all sensor data in parallel utilising high-speed 24-Bit technology. 

Conventional HUMS acquisition regimes wait until the helicopter is flying at a particular speed before taking a measurement. Helitune and the University of Bristol have identified that valuable data is being lost. HT-DASU directly addresses this problem with the continuous acquisition of all vibration data, allowing operators for the first time an opportunity to gain a true picture of aircraft health. 

Additionally, HT-DASU has been developed to meet the rigorous requirements of DO-160G, DO-178 / 254 (level D) and MIL-704 compliance.

Features and benefits

• Rotor Track and Balance (RTB)
• Vibration Health Monitoring
• Gearbox, Bearing and Engine diagnostics
• In-flight tuning (IFT) capability
• Continuous Vibration Acquisition
• Aircraft and Engine Usage Monitoring.
• 24-bit measurement resolution.
• Advanced RTB solutions featuring MFR™
• Integration with Helitune’s RT-Vision database.
• Simultaneous monitoring saves time reduces maintenance & operating costs, cuts carbon footprint and improves availability.
• Environmental qualification to DO-160G.
• Civil Aviation Authority CAP-753 compliant.
• Hardware/Firmware compliance to DO-178 / DO-254 level D.

Product specification