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[Discussion] what's the difference between pos and vel for flight control?

Author: yangyangcv 2017-9-7 17:03
0 31
According to http://wiki.ros.org/dji_sdk, for flight control setpoint, we have 0x40 for horizontal velocity and 0x80 for position offset in bit 7:6 of flight control flag. The difference is quite apparent from the word. however, since the control commands are given in quite high frequency, say 50Hz. in such a small time interval, the difference between pos and vel is not that apparent. i just tried the draw circle sample with control flag set to pos and vel respectively. the final trajectories are almost the same. could anybody kindly point me out in which case we should use pos and in which case we should use vel? Thanks so much!

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