Electrohydrostatic Actuation System
Overview
Moog’s Naval EHAS is a self-contained, power-on-demand and high-power-density actuation system. It enables the elimination of hydraulic infrastructure, fluid and componentry. Thus it reduces SWaP requirements, increases survivability, safety, resilience whilst simplifying integration. EHAS is a scalable platform, modular and able to generate high forces whilst retaining a low and efficient footprint.
Due to its efficiency and reduced maintenance needs, EHAS has a lower cost of ownership than traditional systems. Since the 1980s, Moog has delivered hundreds of EHAS in the aerospace, and various manufacturing industries.
Key Features
- Equals if not exceeds the accuracy, speed, reliability and performance of traditional hydraulic systems
- Customisable and scalable to meet any safety, redundancy, force, speed or space requirement whilst maximising systems commonality
- Reduces space, weight and power by up to 40% in comparison to traditional actuation systems
- Increases survivability and persistence of the platform due to its self-contained nature, the reduction of vibro-acoustic emissions and the redundancy options
- Increases crew safety and reduces maintenance due to the elimination of hydraulic infrastructure and oil tank
- Enables a paradigm shift in naval design due to its self-contained nature and ease of integration
Specifications
| Feature | Performance |
| Forces | Up to 60,000kN - Highly Scalable |
| Flow Rates | Up to 300 l/min - Highly Scalable |
| Acceleration | 340 l/min/s to 715 l/min/s |
| Power Supply | 400VAC, 20A to 800A |
| Power Density | 20 kW/m3 to 70 kW/m3 |
OPTIONAL DESIGN FEATURES
- Built-in hydraulic safety and lock-in functions
- On-field hydraulic recharge
- Power regeneration
- Status monitoring and preventive maintenance
- Redundancy features: primary / back-up arrangements, torque summed, speed summed
- MIL STD capability, resistance to high shock and vibrations
- Compliance to ship classification
- Pressure compensation for external environment up to 9000 psi
APPLICATIONS
Since the 1980s, Moog has delivered hundreds of EHAS in the aerospace, manufacturing and recently naval domain. It is a trusted, reliable and high-performance solution
On naval ships, EHAS can be considered for:
- Actuation of stabilisers and trim tabs
- Actuation of steering systems
- Actuation of mission bay handling systems
- Actuation of ramps and elevators
- Actuation of deck cranes, davits and a-frames
