2016年11月22日 · By googling I found a very interesting Application Note from Texas Instruments which explains very clearly how to apply the FOC algorithm for driving a sensorless 3 phase BLDC. On page 10 of the application note, there is a block diagram of the algorithm and there is a block called Sliding-Mode Based Rotor Position Estimator.

2016年12月16日 · I implemented the FOC (Field Oriented Control) algorithm to control a BLDC motor at low speed. A phenomena I observed is, that at different electrical angles, the torque producing current breaks down and the field producing current increases (mostly around +-90°). I use a simple PI controller and no cross coupling compensation.

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2020年9月27日 · Marlin firmware has an autotuning algorithm, so you could either upload marlin to your board, or hook up a dummy board with marlin on it -> autotune -> get PID vals, and then apply them to the code that you're writing (although be careful for unaccounted problems between the two boards -operating voltage differences, etc.)

2024年7月12日 · Now I have an algorithm which moves the arm to the position(in the desired position and orientation of the racquet) where ball is expected to be(in a linear path shown in image below) . But the racquet just touches the ball because there is no momentum. Due to this, the ball falls nearby and does not reaches the opponent. In the image below:

2017年1月30日 · The next step is to implement a velocity controller, but I actually don't see how to control the velocity at very low speeds. The speed is proportional to the reference torque producing current i_d for FOC and so for low speeds, there is only a very low current and so nearly no power.

2021年3月3日 · A PT1 filter works so that its output is always changing at a rate that would get it from its present value to a value equal to the input value in a certain time period.

2018年1月5日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2022年5月7日 · I am currently conducting a static structural analysis study in Ansys and encountered convergence prolems. I have a very large thermal gradient (almost 600°C) as input from a precedent transient th...

6 天之前 · I would like to try to understand how a "stream function" can be used to determine the velocity $ v(x,r)$ would be determined for a pipe geometry (convergent nozzle), in the convergent se...