Understand the interface decision

Wind direction fluctuates and measurements contain uncertainty. Chasing every small change can increase drive activity without establishing a useful improvement in alignment. An overly wide deadband can also leave meaningful misalignment uncorrected. The control design must balance these effects within the machine’s limits.

Electric-yaw arrangements differ between turbine designs. These questions describe control and interface reviews, not confirmed MARSTON hardware or operating logic. The relevant machine design, mechanical limits and risk assessment must establish the permitted movement and response.

Put these inputs in the review record

Use a project-specific worksheet to capture the following information. For each entry, name the document, revision and person responsible for resolving any uncertainty.

• The wind-direction measurement and its uncertainty. Identify the exact configuration and the supporting document.
• The alignment objective and definition of directional error. Keep the design assumptions visible in the project record.
• Permitted yaw-drive duty and mechanical movement constraints. Name the responsible reviewer and resolve any missing information.
• Entry, exit and timing rules for a yaw correction. State how this entry will be verified during acceptance.

Define the acceptance boundary

Accept the setting through the turbine supplier’s control assessment and relevant validation. Do not judge it only by how frequently the nacelle moves. The review should consider both alignment behavior and the movement duty that the selected equipment can support.

For acceptance, examine direction, nacelle position and yaw commands together. This distinguishes deliberate nonmovement inside the deadband from a failed drive that does not respond after a correction is required.