# Yoshi Minagawa

### MathWorks

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Solved

Solve a System of Linear Equations

*Example*: If a system of linear equations in _x₁_ and _x₂_ is: 2 _x₁_ + _x₂_ = 2 _x₁...

4 months ago

Solved

Find the Oldest Person in a Room

Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

4 months ago

Solved

Convert from Fahrenheit to Celsius

Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...

4 months ago

Solved

Calculate Amount of Cake Frosting

Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

4 months ago

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

4 months ago

how to add rising edge clk like this in stateflow?

Hi Le, You can add the rising edge port on chart block as below. 1. Set "input event" to the variable type 2. Open "Proper...

4 months ago | 0

How to adapt a Field Weakening control in the simulink model in a PMSM system?

Hi Varun, Maybe the sample model shown below is useful for you. In the Simscape Electrical library, there is "PMSM Field-Weaken...

4 months ago | 0

Is there any simple PI controller for Id and Iq current for current control of PMSM motor

Hi Varun, How about the sample model below. It is not so simple model but you can see how to use "Current Controller Block" and...

4 months ago | 0

Error when using spice model for MOSFET for Basic Buck w/ PI control

Hi Christine, When this error occurs, it maybe is valid to enable the filter of Simulink-PS Converter block. By enabling the fi...

4 months ago | 0

| accepted

SIMULINK Blue and black components

Hi LightFury, They are the blocks for electrical modeling but different domain blocks, that why you can't connent them directry...

4 months ago | 1

| accepted

raspberrypi_modbus_masterのモデルをコマンドで起動しようとしてもエラーが出てしまう

小杉様 ご質問ありがとうございます． おそらく、コマンド中のシングルクオーテーション、もしくは括弧が全角となっているために生じるエラーかと思われます． 下記のように半角のものに変更した状態でお試しください． 正：open_system('r...

4 months ago | 0

| accepted

simulink上でのラズパイとカメラ動作について

AK様 ご質問頂きありがとうございます． ハードウェアとの接続が正しく確立できていない可能性があります．下記の図を参考に正しいIPアドレスが設定されていることなどをご確認頂けますでしょうか． また、シミュレーション実行ボタンではなく、「監視と調整...

5 months ago | 0

What environment temperature should I collect the step response data under?thanks.

Hi Shawn, I understood that this problem is changing plant dynamics due to plant's temperature and it makes the control difficu...

5 months ago | 0

Simulink vs Stateflow application for sensor

Hi Hidd, Using Stateflow, you can make Sequence control very easily. (for example, schedulers, fault management systems, and su...

5 months ago | 0

| accepted

Integration step Issue in Simulink execution

Hi Hugh, Your simulink model might be stiff-model. The stiff model is a difficult model to simulate and the calculation speed o...

5 months ago | 0

How to split a line in Simulink?

Hi Moritz, I don't know how to delete only the part of the signal line as you mentioned. But you can do the similar thing by th...

5 months ago | 0

How to change evaluation time of a Matlab Function in Simulink

Hi Fernando, Although I didn't see your model and so I couldn't find the reason of the problem, I described the tips for this p...

5 months ago | 0

How Can I add feedbacks on control inverted pendulum with LQR?

Hi Oguzhan, The value actually measured and obtained corresponds to Y. Therefore, if you get position and velocity values of th...

5 months ago | 0

How to use stateflow inside a simulink closed loop?

Hi Moritz, I understood that your question is about the cause of the difference output between the two logics in attached model...

5 months ago | 1

| accepted

The linearization input/output port specification of the 'statespace_compensation/Bode Plot' block resulted in linear system with a value of zero.

Hi Vasilica, The main reason of this warning is that this model has discontinuous non-linearity. In making not only bode-plot b...

5 months ago | 0

Model a Torque converter from fundamental equations using standard simulink blocks

Hi Aditya, I think the demo model of "sf_car" will be helpful. (Please enter "sf_car" in the command window.) There is a torque...

5 months ago | 0

| accepted

Does anyone know how to fix this?

Hi Tony, It seems that different data from expectedis appeared during "first step" in simulation. (Models that do not require c...

6 months ago | 0

How to build a delta-connected PMSM simulink model or what's the output of PM Synchronous Motor mean 'R' 'C'?

Hello 英奇, Thank you for your asking. First, you should convert R and L in the delta connection to the those in the Y connect...

6 months ago | 0

regenerate braking of bldc motor

Hello Muhammad, Thank you for asking. For modeling regenerative braking circuit for BLDC motor, the following link (sample ...

6 months ago | 0

May I know how to solve this error in Simulink?

Please refer to the link below. You could get a hint. https://jp.mathworks.com/matlabcentral/answers/326834-why-am-i-getting-a...

6 months ago | 0

Simulinkのエラー(line 146)について

エラー表示どおりであれば、simulinkモデル名がMATLABで使用できる命名規則に準じてないことが原因かもしれません． MATLABでは変数名は下記のルールに準じる必要があります 1 ～ 63 文字以内 アルファベット、数値、及びアンダースコアの...

6 months ago | 0

| accepted

Spectrum Analyzer sample rate.

Hello Paul, Please check the signal type of inport signal connected to Spectrum Analyzer Block. It must be a discrete signal. I...

6 months ago | 0

Problem with control of IPMSM

Hello Meikel, Thank you for the question. I checked your model. I didn't understand whole of this model, but I found a part th...

6 months ago | 1

ブラシレスモーターを発電機として利用するシミュレーションはできるか

はい、可能です． ご参考に、簡単な例としてBLDCモーターと三相整流器を用いた電力回生のモデルを作成してみました． モデル右側より、Ideal Angular Velocity Sourceブロックを用いてBLDCモーターを1000rpmで回転する...

6 months ago | 0

| accepted

状態フィードバックを用いた安定化

通常、極配置法で複数の極を移動させる場合、移動先の極は重複しない値を指定する必要があります．これは以下のドキュメントの注意の箇所にも記載があります． https://jp.mathworks.com/help/control/getstart/pole-...

7 months ago | 0

| accepted