Flight Stability Analysis of a Symmetrically-Structured Quadcopter Based on Thrust Data Logger Information

Kuantama, Endrowednes; Ţarcă, Ioan; Dziţac, Simona; Dzițac, Ioan; Ţarcă, Radu

doi:10.3390/sym10070291

Cited by 12 publications

(10 citation statements)

References 34 publications

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“…The vortex method was applied [30,31] to analyze the aerodynamic behavior of the aircraft. The authors’ previous studies [32,33] explain the quadcopter’s propeller design and flight stability analysis. As mentioned previously, the maximum no-load rotor speed was 7030 rpm.…”

Section: Sniffer Quadcopter Design and Analysismentioning

confidence: 99%

The Design and Experimental Development of Air Scanning Using a Sniffer Quadcopter

Kuantama

Ţarcă

Dziţac

et al. 2019

Sensors

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This study presents a detailed analysis of an air monitoring development system using quadcopters. The data collecting method is based on gas dispersion investigation to pinpoint the gas source location and determine the gas concentration level. Due to its flexibility and low cost, a quadcopter was integrated with air monitoring sensors to collect the required data. The analysis started with the sensor placement on the quadcopter and their correlation with the generated vortex. The reliability and response time of the sensor used determine the duration of the data collection process. The dynamic nature of the environment makes the technique of air monitoring of topmost concern. The pattern method has been adapted to the data collection process in which area scanning was marked using a point of interest or grid point. The experiments were done by manipulating a carbon monoxide (CO) source, with data readings being made in two ways: point source with eight sampling points arranged in a square pattern, and non-point source with 24 sampling points in a grid pattern. The quadcopter collected data while in a hover state with 10 s sampling times at each point. The analysis of variance method (ANOVA) was also used as the statistical algorithm to analyze the vector of gas dispersion. In order to tackle the uncertainty of wind, a bivariate Gaussian kernel analysis was used to get an estimation of the gas source area. The result showed that the grid pattern measurement was useful in obtaining more accurate data of the gas source location and the gas concentration. The vortex field generated by the propeller was used to speed up the accumulation of the gas particles to the sensor. The dynamic nature of the wind caused the gas flow vector to change constantly. Thus, more sampling points were preferred, to improve the accuracy of the gas source location prediction.

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Section: Sniffer Quadcopter Design and Analysismentioning

confidence: 99%

The Design and Experimental Development of Air Scanning Using a Sniffer Quadcopter

Kuantama

Ţarcă

Dziţac

et al. 2019

Sensors

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“…Rotorcraft such as helicopters [21,22] and quadcopters [23][24][25] have been improving for many years. The working principles of quadcopters in particular have been extensively described in literature, [26][27][28][29][30][31][32][33] with most attention related to balance control and stability. [26][27][28][29] A few detailed analyses exist which relate to calculation of thrust, but with different effective efficiency.…”

Section: Concise Model For Power Analysismentioning

confidence: 99%

Solar Power Can Substantially Prolong Maximum Achievable Airtime of Quadcopter Drones

Lin

Liao

et al. 2020

Advanced Science

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Sunlight energy is potentially excellent for small drones, which can often operate during daylight hours and fly high enough to avoid cloud blockade. However, the best solar cells provide limited power, compared to conventional power sources, making their use for aerial vehicles difficult to realize, especially in rotorcraft where significant lift ordinarily generated by a wing is already sacrificed for the ability to hover. In recent years, advances in materials (use of carbon-fiber components, improvement in specific solar cells and motors) have finally brought solar rotorcraft within reach. Here, the application is explored through a concise mathematical model of solar rotorcraft based on the limits of solar power generation and motor power consumption. Multiple solar quadcopters based on this model with majority solar power are described. One of them has achieved an outdoor airtime over 3 hours, 48 times longer than it can last on just battery alone with the solar cells carried as dead weight and representing a significant prolongation of drone operation. Solar-power fluctuations during long flight and their interaction with power requirements are experimentally characterized. The general conclusion is that solar cells have reached high enough efficiencies and can outperform batteries under the right conditions for quadcopters.

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“…In the propeller balancer system, an imbalanced propeller occurs when one of the blades generate larger torque than the other. The correction factor (e) is the mass which should be added on one of the propellers according to equation (9). Equation 10expresses the equilibrium of the moments generated by the blades after the mass (e) was added.…”

Section: Propeller Balance Calibrationmentioning

confidence: 99%

“…Depending on the propeller's structure, the magnitude of the generated thrust depends, among others, on the number of blades, propeller diameter, the angle of attack or pitch angle, and the speed of the propeller. [6][7][8][9][10] In twoblade propellers, the blades must have same characteristics especially in terms of weight and angle of attack. Propellers used in quadcopters are generally made of plastic, carbon fiber, or other elastic materials.…”

Section: Introductionmentioning

confidence: 99%

Analysis of quadcopter propeller vibration based on laser vibrometer

Kuantama

Moldovan

Ţarcă

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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An unbalanced propeller can affect a quadcopter's performance due to vibration, also decreasing its thrust's yield. Analyses were conducted to determine the correlation between vibration in the dynamic movement of a balanced and an imbalanced propeller using a laser vibrometer (portable digital vibrometer) PDV-100, to determine the correlation between propeller rotational speed and its vibration, as well as to determine the propeller's maximum rotational speed to avoid over-vibration. The vibration analysis was conducted on a carbon fiber 2-blade propeller by comparing the results of vibration tests with the propeller blade contour. The vibration response of the propeller has been analyzed at three points, respectively the hub, the center, and the tip of the blade, to determine the point having the largest value of the vibration on the propeller running at a maximum rotation speed of 7000 rpm. The same analysis was made on two propellers: the first one of type 1340 with a diameter of 13 inches and the second one of type 1447 with a diameter of 14 inches. The vibration was reduced by propeller's static balancing, thus increasing the propeller stability. The result showed that an imbalanced propeller generated a decrease in the rotational speed and higher vibration values compared to the balanced propeller. The vibration values showed a linear dependency to the rotor speed; the higher the speed, the bigger the vibration. The limit of rotational speed for the balanced model of the 1340 type propeller was 5000 rpm whilst the corresponding value for the 1447 type propeller was 4500 rpm. Finally, the result was used to optimize the propeller's overall performance.

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Flight Stability Analysis of a Symmetrically-Structured Quadcopter Based on Thrust Data Logger Information

Cited by 12 publications

References 34 publications

The Design and Experimental Development of Air Scanning Using a Sniffer Quadcopter

The Design and Experimental Development of Air Scanning Using a Sniffer Quadcopter

Solar Power Can Substantially Prolong Maximum Achievable Airtime of Quadcopter Drones

Analysis of quadcopter propeller vibration based on laser vibrometer

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