Safran has filed a patent for a method to adjust the angular position of an aircraft landing gear wheel using hydraulic cylinders and servo valves. The method involves proportional and integral correction steps to determine a control current for the servo valve, with a specific threshold for limiting the second current. GlobalData’s report on Safran gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Safran, Photovoltaic drones was a key innovation area identified from patents. Safran's grant share as of January 2024 was 65%. Grant share is based on the ratio of number of grants to total number of patents.

Method for adjusting aircraft landing gear wheel angular position

Source: United States Patent and Trademark Office (USPTO). Credit: Safran SA

The patent application (Publication Number: US20240034462A1) discloses a method for adjusting the angular position of a wheel connected to at least one hydraulic cylinder controlled by a servo valve. The method involves determining the angular difference between the measured position and the setpoint position, applying proportional and integral corrections to calculate a control current for the servo valve. Importantly, the method includes a step that limits the second current based on a parametric law, ensuring that the current is set to zero when the angular deviation is below a certain threshold.

Furthermore, the patent application describes a wheel angular position control system that implements the method outlined in the claims. The system includes a calculator to determine the angular difference, apply corrections, and limit the second current according to the parametric law. This system can be integrated into an assembly of a wheel connected to hydraulic cylinders controlled by a servo valve, with the option to include multiple hydraulic cylinders and a hydraulic module. The application also extends to aircraft landing gear and complete aircraft systems incorporating the described assembly.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.