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New Methodology for Testing Flight Actuators in Aiding Loads Catering for Large Prognosis Data Needs

G. SREEDHAR BABU, LOKESHWARAN KANDASWAMY, DR. A. LINGAMURTHY, DR. A.S. SEKHAR

Abstract


A large variety of actuators are used in aerospace applications. They require test benches for qualifying them for flight operation. These test benches are generally of opposing type, where in the actuators are applied opposing loads and the actuators has to prove their capability working against them. Costly Flight load input profile test benches are needed to simulate the actual flight loads including aiding loads to the flight actuators (load applied in the direction of motion of actuator output shaft). This paper presents an idea of using same actuators for both actuator under test (AT) and loading actuator (AL). Both AT and AL will be connected in tandem and load requirements can be met with controlling the current or supply voltage to AL. The required loading direction can be met by advancing or lagging the command to AL in reference with AT. This has many advantages like inherent load, speed, power and bandwidth matching. As both AT and AL are similar, each test run will result in twice the amount of data making it more useful for data intensive experimental prognosis of such systems. The concept is verified with simulation runs on Simulink model representing actual hardware. Experiments are done on analog rotary actuator and linear digital actuators to prove the concept. Current, Voltage and lag controls are experimentally verified for their applicability

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