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Woodward 8200-226 Servo Position Controller

Woodward 8200-226 Servo Position Controller

Product Description

The 8200-226 is a high-precision digital servo position controller developed by Woodward for use in MicroNet and Netcon control system architectures. This module provides closed-loop servo positioning control for hydraulic or pneumatic actuators used...

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SKU: 8200-226
Vendor: Woodward
Category: Servo Position Controller
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Product Description

The 8200-226 is a high-precision digital servo position controller developed by Woodward for use in MicroNet and Netcon control system architectures. This module provides closed-loop servo positioning control for hydraulic or pneumatic actuators used in turbine fuel systems and steam valve control applications.

The 8200-226 processes high-resolution feedback signals from LVDT (Linear Variable Differential Transformer) and RVDT (Rotary Variable Differential Transformer) sensors, ensuring accurate actuator positioning relative to CPU command signals. This level of precision is essential for stable turbine operation, fuel efficiency optimization, and grid frequency stability.

The module incorporates advanced deterministic PID control algorithms optimized for fast actuator response. It also supports automatic calibration functions such as null-seeking and span adjustment, significantly reducing commissioning time during plant startup or maintenance activities. Its ruggedized design enables reliable operation in high-vibration and high-temperature environments commonly found in power generation facilities.

Technical Specifications

Item Specification
Part Number 8200-226
Control Architecture Closed-loop digital servo control
Feedback Compatibility LVDT, RVDT, 4–20 mA position feedback
Output Drive Configurable current output for servo valves
System Interface MicroNet / Netcon VME backplane
Resolution 16-bit A/D conversion
Diagnostics Real-time feedback integrity and coil resistance monitoring
Dimensions 32.9 cm × 20.3 cm × 6.5 cm
Weight 1.55 kg
Operating Temperature -40°C to +70°C

Application Scenarios

The 8200-226 is widely used in:

  • Gas turbine governor control systems

  • Steam turbine valve positioning control

  • Fuel rack positioning systems

  • Industrial mechanical drive actuator control

The module is critical for maintaining precise combustion control and mechanical stability in high-value rotating machinery.

Technical FAQ

Does the 8200-226 support redundant feedback?
Yes. The module can monitor dual-redundant LVDT sensors. If a large deviation between sensors is detected, the system can automatically switch to the healthy sensor or generate a fault condition for safety protection.

How is the module calibrated?
Calibration is typically performed using Woodward GAP (Graphical Application Programmer) software or dedicated handheld programming tools, allowing engineers to electronically define actuator mechanical limits and control parameters.