Performance Metrics ?

[Bimo Bimo]

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How do we measure the performance of a multirotor?
What metrics we can use to compare between different designs?

 

[Electro 2]

Thrust to weight, for starters. Total flight time for a given pack/Ah expended ? Efficiency in prop/motor combos is easily quantified in grams of thrust-per-watt (G/W). Here, typical figures are around 8-9, but the the new generation of 32 pole high voltage motors can double this under certain conditions. Really depends on your vision of the flight system's goal(s), hot-rod aerobatics, absolute heavy lift capacity, precision flight characteristics for AP, yada, yada, yada. No one craft is going to do *all* these things well.

 

[koolkiwikat]

Yep well said, depends on what you want todo, sports car? or diesel truck? me? its all about G/W....efficiency!

 

[ChrisViperM]

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How do we measure the performance of a multirotor?
What metrics we can use to compare between different designs?

How do you define "performance"......?


Chris

 

[Bimo Bimo]

I use the dictionary definition:
The accomplishment of a given task measured against preset known standards of accuracy, completeness, cost, and speed.

 

[Bimo Bimo]

Thank you for the hints. I did a little homework.

- Can we use the following as figures of merit for quantitative comparison of the performance of UAVs:
Max Speed (Km/h), Cruise Speed (Km/h), Ferry Range (Km), Ceiling (m), Rate of Climb (m/s), Thrust-to-Weight ratio, Thrust-per-Watt, Payload Capacity (Kg), Power Consumption (Watt/Kg), Flight Time per Amperes (minutes/A), Variance at Holding Position (m).

- What else should we measure?
- How do we measure maneuverability ?

No system will be good at *all* of these things, but these can be measured and used to characterize the system.