Mavros: setpoint_ * ํ† ํ”ฝ์„ ์‚ฌ์šฉํ•˜๋Š” PX4 SITL / mavros ์˜ค๋ฅ˜ "์˜ˆ๊ธฐ์น˜ ์•Š์€ ๋ช…๋ น 176"

์— ๋งŒ๋“  2016๋…„ 02์›” 22์ผ  ยท  5์ฝ”๋ฉ˜ํŠธ  ยท  ์ถœ์ฒ˜: mavlink/mavros

์•ˆ๋…•ํ•˜์„ธ์š”,

Gazebo์™€ ํ•จ๊ป˜ PX4 SITL์„ ์‹คํ–‰ํ•˜๊ณ  ์žˆ์œผ๋ฉฐ setpoint_ * ์ฃผ์ œ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ํƒœ๋„๋ฅผ ๋ช…๋ นํ•˜๋ ค๊ณ ํ•ฉ๋‹ˆ๋‹ค. UDP๋ฅผ ํ†ตํ•ด mavros๋ฅผ ํ†ตํ•ด ์„ฑ๊ณต์ ์œผ๋กœ ์—ฐ๊ฒฐํ•  ์ˆ˜ ์žˆ์ง€๋งŒ / mavros / setpoint_raw / attitude ์ฃผ์ œ์— ๊ฒŒ์‹œํ•˜๋ฉด Gazebo ํ™˜๊ฒฝ์˜ ์ฟผ๋“œ ์ฝฅํ„ฐ๊ฐ€ OFFBOARD ๋ชจ๋“œ๋กœ ๋ช…๋ น ํ•œ ํ›„ ์ฆ‰์‹œ ๋ฐ”๋‹ฅ์— ๋–จ์–ด์ง‘๋‹ˆ๋‹ค. "make posix_sitl default gazebo"ํ„ฐ๋ฏธ๋„ ์ถœ๋ ฅ์€ "uORB :: DeviceNode :: publish called with invalid handle"๊ฒฝ๊ณ ๋ฅผ ์ถœ๋ ฅํ•˜๊ณ  mavros ๋…ธ๋“œ์˜ ํ„ฐ๋ฏธ๋„ ์ถœ๋ ฅ์€ "CMD : Unexpected command 176, result 0"๊ฒฝ๊ณ ๋ฅผ ์ถœ๋ ฅํ•ฉ๋‹ˆ๋‹ค.

์ด๊ฒƒ์€ / mavros / setpoint_attitude / attitude ๋ฐ / mavros / setpoint_raw / attitude ์ฃผ์ œ ๋ชจ๋‘์— ๊ฒŒ์‹œ ํ•  ๋•Œ ๋ฐœ์ƒํ•˜์ง€๋งŒ / mavros / setpoint_position / local ์ฃผ์ œ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์œ„์น˜๋ฅผ ๋ช…๋ น ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์–ด๋–ค ๋„์›€์„ ์ฃผ์‹œ๋ฉด ๊ฐ์‚ฌํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.

question

๊ฐ€์žฅ ์œ ์šฉํ•œ ๋Œ“๊ธ€

์ด ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐ ํ•˜์…จ๋‚˜์š”? ์ €๋„ ๊ฐ™์€ ๋ฌธ์ œ๋ฅผ ๋งŒ๋‚ฌ์Šต๋‹ˆ๋‹ค. ๋„์™€ ์ฃผ์‹ค ์ˆ˜ ์žˆ๋‚˜์š”? ๊ฐ์‚ฌ

๋ชจ๋“  5 ๋Œ“๊ธ€

๋ช…๋ น 176-MAV_CMD_DO_SET_MODE ๋ฌธ์ œ๊ฐ€ ์•„๋‹™๋‹ˆ๋‹ค. PX4๋Š” SET_MODE ๋ฉ”์‹œ์ง€๋ฅผ ๋‚ด๋ถ€ ๋ฒ„์Šค์˜ ๋ช…๋ น์œผ๋กœ ๋‹ค์‹œ ๋ณด๋ƒ…๋‹ˆ๋‹ค.

ํŽŒ์›จ์–ด์˜ mavlink ๋ชจ๋“ˆ ์–ด๋”˜๊ฐ€์— ๋ฒ„๊ทธ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค. SET_ATTITUDE_TARGET ํ•ธ๋“ค๋Ÿฌ๋ฅผ ํ™•์ธํ•˜์‹ญ์‹œ์˜ค. ๋˜ํ•œ PX4 ํฌ๋Ÿผ์—์„œ ์ง€์›์„ ์š”์ฒญํ•˜์‹ญ์‹œ์˜ค.

@vooon ์ €๋Š” gazebo + offboard ๋ชจ๋“œ๋„ ์‚ฌ์šฉํ•˜๋ ค๊ณ ํ•ฉ๋‹ˆ๋‹ค.

๋‚˜๋Š” ์—ฐ๊ฒฐํ•  ์ˆ˜ ์žˆ๊ณ  mavros / setpoint_attitude / attitude ์ฃผ์ œ์— ์„ฑ๊ณต์ ์œผ๋กœ ๊ฒŒ์‹œํ•˜์ง€๋งŒ ํ—ฌ๋ฆฌ์ฝฅํ„ฐ๋Š” ์–ด๋–ค ์ด์œ ๋กœ ๋“  ์ž์ฒด์ ์œผ๋กœ ๋ฌด์žฅ / ๋ฌด์žฅ ํ•ด์ œ๋ฅผ ๊ณ„์†ํ•ฉ๋‹ˆ๋‹ค. ์ ˆ๋Œ€ ์ด๋ฅ™ํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ๊ทธ๋ƒฅ ๋ฐ”๋‹ฅ์— ์•‰๋Š”๋‹ค.
์ด ์ฝ”๋“œ ( ์ด ์˜ˆ์ œ )๋ฅผ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ์œผ๋ฉฐ / mavros / setpoint_position / local์„ ๊ฒŒ์‹œ ํ•  ๋•Œ ์™„๋ฒฝํ•˜๊ฒŒ ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ ์ฃผ์ œ๋ฅผ ํƒœ๋„๋กœ ๋ฐ”๊พธ๋ฉด ์•ˆ๋ฉ๋‹ˆ๋‹ค.

๋•Œ๋•Œ๋กœ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ฒฝ๊ณ ๊ฐ€ ํ‘œ์‹œ๋ฉ๋‹ˆ๋‹ค. CMD : Unexpected command 176, result 0. ๋•Œ๋•Œ๋กœ ๋‹ค์Œ ๊ฒฝ๊ณ ๊ฐ€ ํ‘œ์‹œ๋ฉ๋‹ˆ๋‹ค. CMD : Unexpected command 400, result 0. / mavros / state๋ฅผ ๋ณด๋ฉด ์—ฐ๊ฒฐ๋˜์–ด ์žˆ๊ณ  ์˜คํ”„ ๋ณด๋“œ ๋ชจ๋“œ์— ์žˆ์ง€๋งŒ ํŒ” / ๋ฌด์žฅ ํ•ด์ œ ์‚ฌ์ด๋ฅผ ๊ณ„์† ๋’ค์ง‘์Šต๋‹ˆ๋‹ค.

์–ด๋–ค ์ถฉ๊ณ ?

์ด ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐ ํ•˜์…จ๋‚˜์š”? ์ €๋„ ๊ฐ™์€ ๋ฌธ์ œ๋ฅผ ๋งŒ๋‚ฌ์Šต๋‹ˆ๋‹ค. ๋„์™€ ์ฃผ์‹ค ์ˆ˜ ์žˆ๋‚˜์š”? ๊ฐ์‚ฌ

@ physics-lzs ์•ˆ๋…•ํ•˜์„ธ์š”. ์—ฌ์ „ํžˆ์ด ๋ฌธ์ œ๊ฐ€์žˆ๋Š” ๊ฒฝ์šฐ setpoint_attitude / thrust๋ฅผ ๊ฒŒ์‹œํ•˜๊ณ  0.5๋ณด๋‹ค ํฐ ๊ฐ’์„ ์ง€์ •ํ•˜์—ฌ ํšจ๊ณผ๋ฅผ ํ™•์ธํ•ด์•ผ ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด์ „ ๊ฒŒ์‹œ๋ฌผ๊ณผ ๋™์ผํ•œ ๊ด€์ฐฐ์ด ๊ณ„์† ํ‘œ์‹œ๋˜๋Š” ๊ฒฝ์šฐ ๋Œ€์‹  setpoint_raw / attitude์— ํƒœ๋„ ๋ช…๋ น์„ ๊ฒŒ์‹œํ•˜์‹ญ์‹œ์˜ค. ๋‹ค์‹œ ๋งํ•˜์ง€๋งŒ, ์ถ”๋ ฅ์— ๊ฐ€์น˜๋ฅผ ๋ถ€์—ฌํ•˜๋Š” ๊ฒƒ์„ ์žŠ์ง€ ๋งˆ์‹ญ์‹œ์˜ค. :) ์ด๊ฒƒ์ด ๋„์›€์ด๋˜๊ธฐ๋ฅผ ๋ฐ”๋ž๋‹ˆ๋‹ค!

@ thealchemist89 ๋” ์ž์„ธํ•œ ์„ค๋ช…์„ ์ œ๊ณตํ•ด ์ฃผ ์—ฌ๊ธฐ ์—์„œ ์˜ˆ์ œ๋ฅผ ์‹คํ–‰ํ•˜๋Š” ๋™์•ˆ์ด ๋ฌธ์ œ์— ์ง๋ฉดํ•˜๊ณ 
Somtimes, ๋‹ค์‹œ ์‹œ์ž‘ํ•˜์—ฌ ROS ๋…ธ๋“œ๋ฅผ ๋‹ค์‹œ ์„ฑ๊ณต์ ์œผ๋กœ ์ž‘์—… ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
roslaunch mavros px4.launch fcu_url : = " udp : // : [email protected] : 14557"
๋‹ค๋ฅธ ๊ฒฝ์šฐ์—๋Š” ์ „์ฒด ์ปดํ“จํ„ฐ๋ฅผ ๋‹ค์‹œ ์‹œ์ž‘ํ•ด์•ผํ•ฉ๋‹ˆ๋‹ค.

์ด ํŽ˜์ด์ง€๊ฐ€ ๋„์›€์ด ๋˜์—ˆ๋‚˜์š”?
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