Design of Filter for Airspeed Sensor in Hybrid Veritcal Take-Off and Landing (VTOL) UAV

Harish Mahatma Putra, Ghozali Suhariyanto Hadi, Amrinal Amrinal, Aris Budiyarto, Agus Budiyono


In this paper, a digital filter for optimizing airspeed sensor in Hybrid Vertical Take-Off and Landing (VTOL) UAV will be presented. The filter itself is a low-pass filter Infinite Impulse Response that will reduce noise from airspeed sensor readings. The hybrid UAV needs reliable data of airspeed to perform autonomous transition smoothly. The main topic of this paper is about design and implementation of simple first order IIR Filter. This paper also includes the algorithm of the filter which will be implemented in the UAV’s autopilot. Therefore, the complex algorithm and the limitation of microprocessor need to be concerned. This filter algorithm theoretically will reduce noise in airspeed data acquisition which disrupt control algorithm in UAV’s autopilot without compromising main microprocessor, particularly when the hybrid UAV is in transition state. The algorithm of this filter tested and validated using a model aircraft and compared before and after adding filter. The result also presented in this paper.


IIR Filter, Optimized Algorithm, Airspeed Sensor, hybrid VTOL UAV

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