1. Development and flight-test verification of two-dimensional rotational low-airspeed sensor for small helicopters
- Author
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Daigo Fujiwara and Takumi Tonoike
- Subjects
Low-airspeed sensor ,Navigation ,Small helicopter ,Flight test ,Technology ,Mechanical engineering and machinery ,TJ1-1570 ,Control engineering systems. Automatic machinery (General) ,TJ212-225 ,Machine design and drawing ,TJ227-240 ,Technology (General) ,T1-995 ,Industrial engineering. Management engineering ,T55.4-60.8 ,Automation ,T59.5 ,Information technology ,T58.5-58.64 - Abstract
Abstract This paper describes the development and the verification of flight test results of a differential pressure-based, two-dimensional low-airspeed sensor designed for the navigation or disturbance detection in small helicopters. The compact and lightweight sensor is integrated with the main rotor of a small helicopter and comprises two probes at both arm ends, a differential pressure sensor, rotary encoder with one magnet and two sensors, microcomputer, a wireless data link, and battery. It measures the differential pressure between the total pressures captured by two total-pressure probes at each rotor angle, instead of using static pressure probes. Thus, the airspeed of the fuselage can be evaluated from the low speed. Flight tests were conducted employing a reference ultrasonic two-dimensional airspeed sensor for comparison. The results demonstrated that the magnitude error of the airspeed is less than 2 m/s for low-airspeed flights ( $$
- Published
- 2024
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