Practical control parameters for UAV?

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SUMMARY

The discussion centers on the practical control parameters for Unmanned Aerial Vehicles (UAVs), specifically regarding flight speed, control range, link speed, and control delay. The user is developing software for a base station that transmits position set points at 20Hz, while noting that GPS has a maximum update rate of 1Hz. Calculations indicate a total delay of approximately 1.005033 seconds for a UAV operating at a speed of 300 km/h, resulting in a positional error of 83.75 meters. The user seeks confirmation on the accuracy of these calculations and practical values for UAV operations.

PREREQUISITES
  • Understanding of UAV control systems
  • Familiarity with GPS technology and its limitations
  • Knowledge of wireless communication principles
  • Basic mathematical skills for calculating latency and speed
NEXT STEPS
  • Research UAV control signal design principles
  • Learn about GPS data transmission rates and their impact on UAV operations
  • Investigate wireless communication latency and its effects on UAV control
  • Explore practical UAV flight parameters and performance metrics
USEFUL FOR

Engineers, UAV developers, and software developers involved in UAV control systems and signal design will benefit from this discussion.

jakesee
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Hi,

Anyone has had experience with UAV control/signal design can tell me what is the typical flight speed (surveillance UAV), control range, link speed and control delay like?

(Sorry, I am not a very good engineering student, furthermore control and signal not my discipline... I can only write decent software.)

I am writing a software for a base station to transmit signals at roughly 20Hz i.e. every 5ms transmit a position set point. The UAV has an on board GPS which will transmit its position to the base station but I read that GPS max rate is 1Hz. I could also transmit a "time" data from both sides to get the elapsed-time...

At 100km range away from the base station a wireless link is theoretically 30 microseconds.
total delay = RTT 60microsecs + BW 5ms (base station) + BW 1s (GPS) = 1.005033s
UAV speed = 300km/h = 83.33m/s
error = 83.75 m
Is this calculation correct?

Thanks in advance for any help.
 
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I am not familiar with UAVs but 1/20Hz = 50mS, not 5mS.
Also, a signal traveling 100Km in 30uS seems a bit fast to me. This is 3E9 m/s no?
 
@es1

looks like i am bad at math as well.. haha..

yea 20Hz = 50ms and the signal is at theoretical speed of light for wireless transmission.

BUT... that's why I am asking, i suspect in practical situations, the range and speed are all affect, so if anyone know the practical values, i'd appreciate much. And also, say, if my calculation is correct (not in the math, but in the theory)

Thanks!
 

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