Woodward 8440-1934 Actuation System Controller

Description

Woodward 8440-1934 Actuation System Controller

Product Dimensions：

The Woodward Actuation System Controller (ASC) is a high-performance, digital control platform designed specifically to manage complex actuation systems in aerospace and industrial turbine applications. It serves as the “brain” that translates high-level command signals into precise mechanical movement.

Product Description

The Woodward ASC is an integrated electronic unit that provides closed-loop control for various types of actuators, including hydraulic, pneumatic, and electric systems. It is engineered to operate in harsh environments, featuring robust EMI/EMC protection and high thermal resistance.

The controller typically monitors position feedback (via LVDTs, RVDTs, or Resolvers) and adjusts the output to a servo valve or motor driver to maintain the desired setpoint with high accuracy and dynamic response.

Key Product Parameters

While specific parameters vary by model (e.g., for the 733, 8200, or MicroNet series), general specifications include:

• Processor: High-speed DSP or FPGA-based architecture for real-time control.

• Input Channels: Multiple redundant inputs for LVDT/RVDT position feedback, 4-20mA, or digital bus (CAN, ARINC 429, or Ethernet).

• Output Channels: High-current servo outputs, discrete relay outputs, and proportional valve drivers.

• Update Rate: Typically $< 5ms$ for high-bandwidth flight or turbine control.

• Operating Temperature: Wide range, often $-40^{circ}C$ to $+85^{circ}C$ (industrial) or higher for aerospace.

• Enclosure: IP67 rated or ruggedized LRU (Line Replaceable Unit) housing.

Product Advantages

• High Precision: Advanced algorithms ensure minimal hysteresis and ultra-fine positioning.

• Redundancy & Reliability: Supports dual or triple-redundant configurations to ensure “fail-safe” or “fail-operational” performance.

• Diagnostic Intelligence: Built-in Health Monitoring (HUMS) and Built-In Test (BIT) to detect wiring faults, sensor failures, or mechanical stiction.

• Modular Design: Easily configurable to control different types of actuators without hardware overhauls.

• Environmentally Hardened: Designed to withstand extreme vibration, shock, and electromagnetic interference.

Safety & Operational Precautions

• Static Sensitivity: The unit contains sensitive CMOS components; always use ESD-safe handling procedures during installation.

• Calibration: Ensure feedback sensors (LVDTs) are properly nulled and calibrated within the software before full system pressurization.

• Thermal Management: Ensure adequate airflow or heatsinking as specified in the manual to prevent thermal throttling.

• Wiring Integrity: Use shielded twisted-pair cables for feedback signals to prevent signal noise from affecting positioning accuracy.

Common Applications

• Aerospace: Flight control surfaces (flaps, slats, ailerons) and engine thrust reverser actuation.

• Gas Turbines: Variable Inlet Guide Vane (VIGV) control and fuel metering valve actuation.

• Steam Turbines: Control of large steam admission valves and extraction valves.

• Industrial Automation: Heavy-duty positioning systems in power plants and oil & gas facilities.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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