Aircraft Monitoring System

for UAV/Aircraft optimization and flight performance analysis

AMS installed on an engine nacelle

AMS: TNT-Meter and electronic enclosure

The AMS consisting in a thrust and torque sensor (TNT-Meter), connected with onboard electronics to record in real time flight and engine parameters. The AMS is intended to quantify the aerodynamic and propulsion efficiency of the aircraft, with the objective to maximize aircraft overall efficiency, increase payload, range and endurance. The AMS can be used on any type of electrically powered aircraft (UAV, VTOL, Airplane…)

AMS: TNT-Meter and electronic enclosure

TNT-Meter Capacity

Our current range of TNT sensors have the following load capacities. Different load capacities can be studied on request.

Model	Thrust	Torque
TNT-050-02	50 N	2 Nm
TNT-100-05	100 N	5 Nm
TNT-250-15	250 N	15 Nm
TNT-500-30	500 N	30 Nm
TNT-750-50	750 N	50 Nm

The AMS can be used on different aircraft sizes. This estimation is based on the ratio Mx. Thrust / Mx. Weight:

> 0.4 for fixed wing aircraft,
> 2 for multirotor aircraft

Model	W_Airplane [kg]		W_multirotor [kg]
	1-Engine	2-Engines	4-Engines	6-Engines	8-Engines	10-Engines
TNT-050-02	13	25	10	15	20	25
TNT-100-05	25	51	20	31	41	51
TNT-250-15	64	127	51	76	102	127
TNT-500-30	127	255	102	153	204	255
TNT-750-50	191	382	153	229	306	382

Computed accuracy (fixed wing aircraft)

The computed accuracy is determined analytically from sensors manufacturer datasheets assuming that the wing area, the total wetted area, the flight weight, the wing aspect ratio and the Oswald efficiency factor are known.

	Accuracy
Electrical efficiency	1.80%
Propeller efficiency	3.02%
Aerodynamic efficiency (Cfe)	2.53%
Lift Coefficient (Cl)	2.00%
Rate of climb	0.25%

Sensors specifications

The table below lists some of the technical specifications of the different sensors used on the current version of the electronic board.

Sensor		Mn Value	Mx Value	Accuracy	Resolution
TNT-050-02
- Thrust	N	-50	50	0.10%	0.01
- Torque	Nm	-2	2	0.50%	0.001
TNT-100-05
- Thrust	N	-100	100	0.10%	0.01
- Torque	Nm	-5	5	0.50%	0.001
TNT-250-15
- Thrust	N	-250	250	0.10%	0.01
- Torque	Nm	-15	15	0.50%	0.001
TNT-500-30
- Thrust	N	-500	500	0.10%	0.01
- Torque	Nm	-30	30	0.50%	0.001
TNT-750-50
- Thrust	N	-750	750	0.10%	0.01
- Torque	Nm	-50	50	0.50%	0.001
Temperature	°C	-20	45	1°	0.01
Pressure	Pa	30 000	110 000	0.12%	0.01
Differential pressure	Pa	0	2000	1%	0.01
Voltage	V	0	36	0.15%	0.01
Current	A	0	55	0.15%	0.01
Density				3.33%	0.01
Load factor	g	0	4	1%	0.01
GPS position				2m	0.1
GPS heading	°			0.3°	0.01
GPS vertical speed	m/s	0	500	0.05m/s	0.01
Air speed	m/s			2.92%	0.01
Engine RPM	rpm			1%	0.01

AMS - Technical specifications

Thrust / Torque sensor	Dimensions	050-02	Diameter	74 mm
			Lenght	20 mm
		100-05	Diameter	81 mm
			Lenght	23 mm
		250-15	Diameter	103 mm
			Lenght	27 mm
		500-30	Diameter	110 mm
			Lenght	32 mm
		750-50	Diameter	122 mm
			Lenght	36 mm
	Weight	050-02	79 g
		100-05	106 g
		250-15	232 g
		500-30	309 g
		750-50	453 g
	Protection		IP 54
Electronics enclosure	Dimensions		93 x 73 x 26 mm
	Weight		95 g
	Sampling rate		10 – 20000 Hz

Don’t hesitate to contact OAD if you need addition information