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Design of induction motor speed observer based on long short-term memory

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Abstract

This paper presents a machine learning regression algorithm based on speed estimation for sensorless control of an induction motor. Long short-term memory (LSTM) based on deep learning method is used to design the induction motor speed observer. The proposed LSTM observer utilizes only the measured stator currents and voltages. It estimates the motor speed in the presence of inherent dynamics and sensor noises. Although LSTM is one of the common deep learning methods, its implementation on speed estimation for induction motor has not been tackled in the literature. The estimation performance of proposed LSTM observer (LSTMO) is investigated using four common metrics: root relative squared error, mean absolute error, mean squared error and root mean squared error. Performance of the proposed method is well guaranteed for different operating speeds. The designed observer is compared with the traditional sliding mode observer in order to prove the validity. It can be deduced from experimental results that the proposed method estimates the actual speed value successfully. LSTMO tracks the speed accurately regardless of any changes in reference speed. It is shown that there is no chattering effect on the estimated speed as compared with SMO.

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Corresponding author

Correspondence to Erdem Ilten.

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Appendices

Appendix 1

LSTM training configurations (ADAM)

Gradient decay factor

0.9000

Squared gradient decay factor

0.9990

Epsilon

1.0000e-08

Initial learn rate

1.0000e-03

Learn rate schedule

‘piecewise’

Learn rate drop factor

1

Learn rate drop period

5

L2 regularization

1.0000e−4

Gradient threshold method

‘l2norm’

Gradient threshold

Inf

Max epochs

20,000

Mini batch size

64

Verbose

1

Verbose frequency

50

Validation data

[]

Validation frequency

50

Validation patience

Inf

Shuffle

‘once’

Checkpoint path

‘’

Execution environment

‘auto’

Worker load

[]

Output Fcn

[]

Plots

‘training-progress’

Sequence length

‘longest’

Sequence padding value

0

Sequence padding direction

‘right’

Dispatch In background

0

Reset input normalization

1

Batch normalization statistics

‘population’

Appendix 2

Training

Testing

Runs

Metrics

LSTMORRSE

LSTMOMAE

LSTMOMSE

LSTMORMSE

Runs

Metrics

LSTMORRSE

LSTMOMAE

LSTMOMSE

LSTMORMSE

1

RRSE

9.418848038

3.526246071

17.49655724

3.246854782

1

RRSE

2.668583632

13.68160915

10.0595665

0.017718811

MAE

0.006260031

0.004349939

0.010593898

0.004778219

MAE

0.007071496

0.012227926

0.010117421

0.007035259

MSE

5.51E-05

3.03E-05

0.000148169

4.83E-05

MSE

0.000180098

0.000262202

0.00019763

0.000136089

RMSE

0.007421944

0.005507178

0.012172464

0.00695064

RMSE

0.013420048

0.016192665

0.014058078

0.011665709

2

RRSE

9.149031639

3.324883938

18.5030098

3.176984072

2

RRSE

5.580521107

10.32260132

7.826035023

0.658511817

MAE

0.006378506

0.004222007

0.011313778

0.005228935

MAE

0.007056737

0.009973672

0.008047258

0.007427121

MSE

5.78E-05

2.65E-05

0.000167483

5.67E-05

MSE

0.000165052

0.000178353

0.000155643

0.000132479

RMSE

0.00760504

0.005152079

0.012941515

0.007526683

RMSE

0.012847264

0.013354871

0.012475694

0.011509959

3

RRSE

9.39336586

3.290128946

19.59127998

3.127569437

3

RRSE

6.922595501

7.627953053

12.81419659

2.412278414

MAE

0.006350711

0.004242572

0.01181056

0.005086933

MAE

0.00718584

0.008176859

0.011219737

0.006660185

MSE

5.73971E-05

3.0552E-05

0.000179937

5.09104E-05

MSE

0.000168162

0.000153822

0.000224967

0.000126699

RMSE

0.007576089

0.005527387

0.013414076

0.00713515

RMSE

0.01296771

0.012402512

0.014998907

0.011256046

4

RRSE

1.306487322

20.99702835

1.50126946

5.446084023

4

RRSE

6.630444527

7.587314606

11.55204391

2.09450841

MAE

0.003635295

0.012531962

0.005000455

0.005549603

MAE

0.006991637

0.007991162

0.010374757

0.007069815

MSE

2.00E-05

0.00016857

4.65E-05

5.44E-05

MSE

0.000164314

0.00014906

0.000205795

0.0001333

RMSE

0.004470969

0.012983467

0.006821549

0.00737336

RMSE

0.012818511

0.012208994

0.014345541

0.011545583

5

RRSE

3.04867053

17.50133324

3.858956099

3.503109932

5

RRSE

7.307052612

6.952277184

10.96157265

2.71931839

MAE

0.003962351

0.01045765

0.005059151

0.005358941

MAE

0.007134117

0.007527955

0.010137635

0.007265371

MSE

2.59E-05

0.000125065

4.98E-05

5.21E-05

MSE

0.000164486

0.000133014

0.00020216

0.000155114

RMSE

0.005086054

0.011183232

0.007057874

0.007220299

RMSE

0.012825198

0.011533155

0.014218311

0.012454473

6

RRSE

4.306676388

15.37772083

6.632499218

2.285447359

6

RRSE

7.482122898

6.440505028

11.28944683

3.063552141

MAE

0.004474522

0.009267899

0.005748326

0.005145377

MAE

0.007331906

0.007166887

0.010321706

0.007350747

MSE

3.09E-05

0.000102578

5.74E-05

5.18E-05

MSE

0.000172519

0.000132214

0.000204912

0.000157098

RMSE

0.005559922

0.010128069

0.007577162

0.007196878

RMSE

0.013134649

0.011498431

0.014314743

0.012533883

7

RRSE

5.286098003

13.52388287

8.251178741

1.121043921

7

RRSE

7.246935844

4.619747162

12.89699554

3.810185432

MAE

0.004487365

0.008280195

0.006391491

0.004864099

MAE

0.007125809

0.006744046

0.011263018

0.006657805

MSE

3.24E-05

8.51E-05

7.35E-05

4.48E-05

MSE

0.000162235

0.000126699

0.000233945

0.000150451

RMSE

0.005691004

0.009225348

0.008575831

0.006691532

RMSE

0.012737154

0.011256078

0.015295245

0.012265846

8

RRSE

6.705172062

10.57586956

11.5995779

0.30301404

8

RRSE

7.543101788

3.805944681

13.91415882

4.528122425

MAE

0.005004418

0.006831058

0.007624794

0.004667386

MAE

0.007346611

0.006808578

0.011829331

0.006614024

MSE

3.79E-05

6.20E-05

8.73E-05

4.60E-05

MSE

0.000169251

0.000129216

0.000244983

0.000152715

RMSE

0.0061569

0.007876472

0.0093429

0.006783974

RMSE

0.013009667

0.01136733

0.015651928

0.012357794

9

RRSE

7.161473274

9.925579071

12.65333652

0.68126756

9

RRSE

6.629994392

4.343562603

16.27892303

4.894608021

MAE

0.005405077

0.006369478

0.008168098

0.004881911

MAE

0.00724201

0.007542234

0.013223928

0.006704318

MSE

5.36E-05

5.66E-05

0.000102979

4.39E-05

MSE

0.000173858

0.000190672

0.000281014

0.000154519

RMSE

0.007321612

0.007520807

0.010147859

0.006624342

RMSE

0.013185541

0.013808408

0.016763484

0.012430552

10

RRSE

7.730611324

8.111246109

13.72068405

1.340061426

10

RRSE

8.399152756

2.521861792

15.76922607

4.48237133

MAE

0.005301708

0.005846383

0.008881926

0.004472319

MAE

0.008260184

0.006941829

0.01321882

0.007105742

MSE

4.11E-05

5.14E-05

0.000116789

4.18E-05

MSE

0.000179354

0.000141171

0.000282715

0.000141207

RMSE

0.006411572

0.007166377

0.010806899

0.00646449

RMSE

0.013392327

0.011881541

0.016814124

0.011883047

11

RRSE

8.246351242

7.128528118

14.67404652

2.161147118

11

RRSE

8.564740181

2.460358858

14.69442654

4.974498272

MAE

0.005568364

0.005312016

0.009154497

0.004745898

MAE

0.008203689

0.006491726

0.012558551

0.007406249

MSE

4.67E-05

4.20E-05

0.000119662

4.33E-05

MSE

0.000179176

0.000118808

0.000266613

0.000159853

RMSE

0.00683275

0.006477964

0.010938994

0.006580677

RMSE

0.013385655

0.0108999

0.016328281

0.012643311

12

RRSE

8.01764679

7.367462635

13.81046486

1.822310686

12

RRSE

7.992843628

3.103095293

17.28656578

5.937756062

MAE

0.00563979

0.005385101

0.008747359

0.004925379

MAE

0.007859158

0.006905321

0.013597504

0.007215901

MSE

4.72E-05

4.41E-05

0.000109174

5.06E-05

MSE

0.000179588

0.000128628

0.000292011

0.000166077

RMSE

0.006867181

0.006640861

0.010448653

0.007109851

RMSE

0.013401036

0.011341426

0.01708832

0.012887081

13

RRSE

8.04128933

6.333078384

14.07639599

2.18533349

13

RRSE

9.172445297

1.139784575

16.91308212

5.492619991

MAE

0.005637942

0.005151529

0.008829397

0.004801015

MAE

0.008500945

0.00705429

0.014018349

0.007201904

MSE

4.65E-05

4.00E-05

0.000115587

4.85E-05

MSE

0.000187962

0.000136562

0.000306731

0.000135102

RMSE

0.006820661

0.00632637

0.010751128

0.006966119

RMSE

0.013709915

0.011685953

0.01751373

0.011623331

14

RRSE

8.396392822

5.321415901

13.93141174

2.552544355

14

RRSE

8.368747711

1.923480272

19.48267174

6.174377918

MAE

0.005794688

0.004741536

0.008701168

0.004685224

MAE

0.008357272

0.006711199

0.015602195

0.007307443

MSE

4.82E-05

3.50E-05

0.000106328

4.88E-05

MSE

0.000196764

0.000145363

0.000348578

0.000143308

RMSE

0.006945137

0.005918995

0.01031155

0.006985215

RMSE

0.014027272

0.012056658

0.018670231

0.011971114

15

RRSE

9.787680626

3.385415077

15.2611208

3.927855015

15

RRSE

9.889588356

1.128131509

18.83555984

6.182326794

MAE

0.006162158

0.004430962

0.009431798

0.004787944

MAE

0.008918705

0.007161868

0.014807743

0.007991103

MSE

5.47E-05

3.22E-05

0.000127544

4.82E-05

MSE

0.000200284

0.000165147

0.000331715

0.000169912

RMSE

0.007398812

0.005670188

0.01129352

0.006939294

RMSE

0.01415218

0.012850969

0.018213047

0.013035043

16

RRSE

9.092707634

3.223680735

14.40806007

3.484260082

16

RRSE

6.326579571

6.522587776

6.347493172

2.398679256

MAE

0.00600011

0.004416592

0.009048891

0.004757599

MAE

0.006652007

0.007400653

0.00741112

0.007136225

MSE

5.17E-05

3.17E-05

0.000120915

4.57E-05

MSE

0.000172418

0.000143762

0.000159777

0.000132709

RMSE

0.007191082

0.005631145

0.010996114

0.006759215

RMSE

0.013130791

0.011990085

0.012640292

0.011519928

17

RRSE

9.177042007

2.960017443

14.49669743

3.630592823

17

RRSE

7.975327492

3.953770399

10.1101017

3.556468725

MAE

0.006081981

0.004323687

0.009015884

0.00476124

MAE

0.00788285

0.006161991

0.009607174

0.007641668

MSE

5.23E-05

3.05E-05

0.000115905

5.02E-05

MSE

0.000175428

0.000114669

0.00019217

0.000165876

RMSE

0.007234795

0.005518392

0.010765895

0.007084363

RMSE

0.013244913

0.010708384

0.013862554

0.012879279

18

RRSE

10.35882568

2.431340456

18.7802639

4.28304863

18

RRSE

8.080028534

3.792222738

10.40210152

3.636235476

MAE

0.006523961

0.004284566

0.011312958

0.005037513

MAE

0.00788418

0.006277016

0.009809324

0.007533209

MSE

5.91E-05

3.03E-05

0.000166722

4.79E-05

MSE

0.000174075

0.000114196

0.000187731

0.0001597

RMSE

0.007687051

0.005503376

0.012912076

0.006919891

RMSE

0.013193735

0.010686262

0.013701498

0.012637227

19

RRSE

9.391844749

3.055666208

18.41030502

3.468268871

19

RRSE

8.450791359

3.210067749

12.01174068

3.708900928

MAE

0.006257656

0.004298432

0.011184405

0.00491498

MAE

0.007938721

0.006489959

0.01096543

0.007347065

MSE

5.55E-05

2.82E-05

0.000162764

5.18E-05

MSE

0.000176986

0.000153514

0.000227903

0.000149616

RMSE

0.007447345

0.005306832

0.012757903

0.007194906

RMSE

0.013303599

0.012390064

0.015096473

0.012231751

20

RRSE

9.791671753

1.946482897

17.99656677

3.912195444

20

RRSE

8.685555458

2.690992594

12.47299862

4.039010525

MAE

0.006417119

0.003980397

0.010874598

0.004969217

MAE

0.00829056

0.006095721

0.011194387

0.007367417

MSE

5.73E-05

2.72E-05

0.000154625

5.11E-05

MSE

0.00018472

0.000126111

0.000222807

0.00014258

RMSE

0.007569712

0.005210802

0.01243483

0.00714579

RMSE

0.013591187

0.011229934

0.014926734

0.011940689

21

RRSE

1.151005626

20.93393326

1.61465919

5.179502964

21

RRSE

7.993913174

1.405203223

19.3386631

7.281675816

MAE

0.003587903

0.012515613

0.005088875

0.005359588

MAE

0.007644069

0.007409093

0.015308117

0.007373263

MSE

1.96E-05

0.000170084

4.76E-05

4.89E-05

MSE

0.000202084

0.000159089

0.000352705

0.000152411

RMSE

0.004426551

0.013041624

0.006895991

0.006993357

RMSE

0.014215617

0.012613068

0.018780429

0.012345501

22

RRSE

4.721087933

14.08647251

6.070676804

1.577996492

22

RRSE

8.472633362

0.225629628

20.53218079

7.597074986

MAE

0.004394084

0.008656065

0.005749199

0.004748845

MAE

0.007918749

0.007607555

0.016108934

0.007331847

MSE

3.86E-05

9.37E-05

6.28E-05

4.27E-05

MSE

0.000188463

0.0001879

0.000367236

0.000162931

RMSE

0.006209368

0.009679062

0.007927103

0.006535403

RMSE

0.013728196

0.013707652

0.019163411

0.012764459

23

RRSE

5.285715103

11.88545322

8.465101242

0.688143492

23

RRSE

8.188530922

0.563410342

19.73656082

7.096270084

MAE

0.00438732

0.007356174

0.00627473

0.004475981

MAE

0.007690742

0.007577449

0.015667846

0.006979452

MSE

2.97E-05

6.99E-05

6.57E-05

3.89E-05

MSE

0.000183972

0.000159939

0.000348788

0.000139854

RMSE

0.005447874

0.00835795

0.008106377

0.006234538

RMSE

0.013563617

0.012646681

0.018675879

0.011825983

24

RRSE

5.591560364

10.78257179

7.95010519

0.100517347

24

RRSE

8.479554176

0.3343952

19.55312538

7.812271118

MAE

0.004569247

0.006905103

0.006298932

0.004612876

MAE

0.00785411

0.00737749

0.015416115

0.007326439

MSE

3.42E-05

6.40E-05

6.87E-05

4.36E-05

MSE

0.000185844

0.000145844

0.000342492

0.000164227

RMSE

0.005849355

0.008000671

0.00828966

0.006605408

RMSE

0.013632474

0.012076573

0.018506553

0.01281512

25

RRSE

6.128604889

9.206692696

11.60713482

0.241750702

25

RRSE

8.478050232

0.189988986

20.16418266

7.571714401

MAE

0.004802908

0.006051816

0.00768233

0.00450154

MAE

0.007806574

0.007595241

0.015954887

0.007335765

MSE

3.47E-05

5.40E-05

8.91E-05

4.06E-05

MSE

0.000188637

0.000160383

0.000360854

0.000143826

RMSE

0.005889174

0.007350211

0.00944042

0.006371219

RMSE

0.013734516

0.012664231

0.018996162

0.01199274

26

RRSE

6.608845234

8.158085823

10.97660351

0.910784304

26

RRSE

8.011313438

0.675485849

19.97354317

7.072063446

MAE

0.0048871

0.005741586

0.007257248

0.004320623

MAE

0.007612485

0.007474384

0.015624346

0.007152535

MSE

3.47E-05

4.81E-05

8.52E-05

4.25E-05

MSE

0.000185275

0.000162225

0.000354367

0.000143339

RMSE

0.005892995

0.006938844

0.009232687

0.006516813

RMSE

0.013611582

0.012736746

0.018824633

0.011972437

27

RRSE

6.861320019

7.324820995

11.7957716

1.249208212

27

RRSE

7.363449574

1.936250687

18.89953041

6.708554745

MAE

0.005151983

0.005319409

0.007621985

0.004468231

MAE

0.007156076

0.007303722

0.01484952

0.007077089

MSE

3.86E-05

4.07E-05

8.60E-05

4.14E-05

MSE

0.000186322

0.000163241

0.000330344

0.000140859

RMSE

0.006212273

0.006383425

0.009272109

0.006433568

RMSE

0.013649969

0.01277659

0.018175358

0.011868417

28

RRSE

1.832819104

15.83655167

1.937633395

3.438581228

28

RRSE

7.875720024

1.502499938

19.51660728

7.346045017

MAE

0.003238135

0.009563868

0.004983363

0.004544165

MAE

0.00752382

0.007286938

0.015171056

0.007363629

MSE

1.69E-05

0.000107957

4.59E-05

3.66E-05

MSE

0.000185235

0.000152857

0.00033945

0.000164746

RMSE

0.004113377

0.010390242

0.006775156

0.006046682

RMSE

0.013610103

0.012363521

0.01842417

0.012835339

29

RRSE

4.576643467

10.6365633

4.561273098

0.605561078

29

RRSE

7.811802387

1.443646312

20.17746735

6.97763586

MAE

0.003889236

0.006661592

0.005336394

0.004231307

MAE

0.007355128

0.007327405

0.015786301

0.007033275

MSE

2.37E-05

5.72E-05

5.18E-05

3.93E-05

MSE

0.000185986

0.000158743

0.000357127

0.000139749

RMSE

0.004867573

0.00756449

0.007197705

0.006271651

RMSE

0.01363767

0.012599338

0.018897794

0.011821568

30

RRSE

6.382016659

8.093851089

6.727919102

0.788435638

30

RRSE

7.714351177

1.679606795

18.38054085

7.332436085

MAE

0.004423352

0.006003464

0.005904355

0.004270176

MAE

0.007328041

0.007183528

0.01456661

0.007315627

MSE

3.05E-05

6.71E-05

6.22E-05

3.60E-05

MSE

0.000186598

0.000142306

0.000318098

0.000163966

RMSE

0.005522259

0.00819318

0.007884932

0.006000633

RMSE

0.013660084

0.011929211

0.017835295

0.012804924

31

RRSE

6.276622295

6.276304722

7.292142868

1.405661106

31

RRSE

8.191814423

1.085845709

19.35712051

7.4741745

MAE

0.004670341

0.004952581

0.005844653

0.004297324

MAE

0.007819866

0.007054044

0.015345143

0.007461767

MSE

3.33E-05

3.78E-05

6.05E-05

4.30E-05

MSE

0.00018647

0.000133681

0.000337538

0.000169426

RMSE

0.005770518

0.006144757

0.007780995

0.006558882

RMSE

0.013655415

0.01156204

0.018372212

0.013016392

32

RRSE

6.714302063

5.087916374

9.897346497

1.620143533

32

RRSE

7.729020119

1.191905379

20.40231323

6.876341343

MAE

0.00465186

0.004559014

0.006775913

0.004132907

MAE

0.007682878

0.007166218

0.015977206

0.007051782

MSE

3.32E-05

3.37E-05

7.53E-05

3.33E-05

MSE

0.000185591

0.000163839

0.000354442

0.000142478

RMSE

0.005763428

0.005808932

0.008676073

0.005774904

RMSE

0.013623194

0.012799968

0.018826623

0.0119364

33

RRSE

7.406809807

3.814402819

10.1796999

2.496333361

33

RRSE

7.835498333

1.422548771

19.65023232

7.421327591

MAE

0.00512172

0.004324336

0.006888068

0.004312552

MAE

0.007526658

0.007397214

0.015524383

0.00724483

MSE

3.83E-05

3.10E-05

8.16E-05

3.83E-05

MSE

0.000197118

0.000150653

0.000347086

0.000146072

RMSE

0.006190902

0.005565836

0.009033924

0.006186175

RMSE

0.014039864

0.012274075

0.018630248

0.012086023

34

RRSE

7.399498463

3.353266239

10.45517349

2.380333185

34

RRSE

7.812380791

1.569856167

19.31220245

7.450750351

MAE

0.005109637

0.004311424

0.007086303

0.0044443

MAE

0.007335482

0.007233674

0.015125544

0.007228965

MSE

3.90E-05

3.12E-05

8.50E-05

3.93E-05

MSE

0.000176977

0.000145313

0.000334656

0.000165314

RMSE

0.006241206

0.005583348

0.009217535

0.006271425

RMSE

0.013303279

0.012054599

0.01829361

0.012857459

35

RRSE

8.238182068

2.257633924

12.91383839

3.009449959

35

RRSE

8.139739037

1.791327

21.93042183

7.602011681

MAE

0.005366476

0.003734543

0.008134623

0.004271665

MAE

0.007451959

0.007794598

0.016633315

0.007348958

MSE

4.18E-05

2.54E-05

9.80E-05

3.49E-05

MSE

0.000188724

0.000167315

0.000383303

0.000146047

RMSE

0.006462176

0.005035311

0.009901814

0.005905249

RMSE

0.013737672

0.01293503

0.019578135

0.012085009

36

RRSE

8.604465485

1.274289727

12.1039772

3.788179874

36

RRSE

7.931909561

1.235551

18.92589378

7.692430019

MAE

0.005501057

0.004173941

0.007757239

0.004335421

MAE

0.00765868

0.007249773

0.014952833

0.007526848

MSE

4.31E-05

3.01E-05

9.71E-05

3.87E-05

MSE

0.0001586

0.000121556

0.000328603

0.000148128

RMSE

0.006565338

0.005484293

0.009853259

0.006219626

RMSE

0.012593656

0.01102524

0.018127402

0.012170776

37

RRSE

9.111460686

1.011760473

14.76052475

4.005013466

37

RRSE

7.910579681

1.526494384

19.22528458

7.427342892

MAE

0.005772948

0.00405997

0.009111213

0.004466235

MAE

0.007403136

0.007380349

0.015017303

0.007202365

MSE

4.59E-05

2.78E-05

0.00011862

3.76E-05

MSE

0.000189521

0.000150182

0.000339669

0.000149624

RMSE

0.006778528

0.005273215

0.010891263

0.00613579

RMSE

0.013766674

0.012254872

0.018430114

0.012232099

38

RRSE

9.252702713

1.21647346

14.64553928

4.036224842

38

RRSE

7.486089706

1.818207145

19.62262917

7.877697468

MAE

0.006009937

0.004259036

0.009099979

0.004589162

MAE

0.007133023

0.007035055

0.01519981

0.007992134

MSE

5.01E-05

3.16E-05

0.000122099

4.25E-05

MSE

0.000197008

0.00015039

0.000346896

0.000163652

RMSE

0.007079761

0.005621814

0.01104984

0.006516162

RMSE

0.014035956

0.012263369

0.018625151

0.012792641

39

RRSE

8.706567764

1.158379793

14.28929806

3.659450054

39

RRSE

7.781282425

2.251657009

18.4135437

7.317749023

MAE

0.005840024

0.003902864

0.008861193

0.00455858

MAE

0.007202005

0.008148436

0.014493564

0.007183693

MSE

4.92E-05

2.69E-05

0.000113961

3.91E-05

MSE

0.00018974

0.0001652

0.000327626

0.000143165

RMSE

0.007015065

0.00519067

0.01067527

0.006252967

RMSE

0.013774601

0.012853005

0.018100448

0.011965175

40

RRSE

9.25455761

0.267809063

15.61623859

4.121153355

40

RRSE

7.029219151

2.792447329

19.35932732

6.570281506

MAE

0.006009383

0.003940254

0.009588476

0.004630211

MAE

0.006883624

0.007529828

0.015036232

0.00724387

MSE

4.98E-05

2.80E-05

0.000129308

4.15E-05

MSE

0.000188094

0.000167881

0.000337763

0.000143063

RMSE

0.007057134

0.005291339

0.011371358

0.006445138

RMSE

0.013714748

0.012956879

0.018378334

0.011960912

41

RRSE

10.11128521

1.136354804

17.86570549

4.975209236

41

RRSE

8.175927162

1.923269987

20.2292614

8.05198288

MAE

0.006325124

0.004159327

0.010795362

0.004738116

MAE

0.007492046

0.007333628

0.01567021

0.007663357

MSE

5.36E-05

3.05E-05

0.000155025

4.25E-05

MSE

0.000190717

0.000147727

0.000349662

0.000175051

RMSE

0.007323223

0.005524328

0.01245092

0.006517296

RMSE

0.013810023

0.012154279

0.018699246

0.013230701

42

RRSE

10.23351765

0.32144013

18.88076782

5.131510735

42

RRSE

7.640318394

1.992036819

19.28205872

7.438173771

MAE

0.006641489

0.004071428

0.011272075

0.004806296

MAE

0.00732991

0.007462173

0.015077786

0.007454067

MSE

5.93E-05

2.89E-05

0.000161025

4.40E-05

MSE

0.000188626

0.000152298

0.000340758

0.0001669

RMSE

0.007701404

0.00538042

0.012689564

0.006636936

RMSE

0.013734116

0.012340907

0.01845964

0.012918961

43

RRSE

9.837866783

0.256581545

18.66327858

4.766049862

43

RRSE

7.735900879

2.022973061

20.55413055

7.258568287

MAE

0.00621024

0.00409312

0.011020721

0.00455153

MAE

0.007292325

0.007459333

0.015947167

0.007314213

MSE

5.32E-05

2.96E-05

0.000157153

4.16E-05

MSE

0.000191644

0.000164718

0.000364617

0.00014681

RMSE

0.007290758

0.005438351

0.012536085

0.006450916

RMSE

0.013843538

0.012834235

0.019094948

0.012116535

44

RRSE

10.21303368

0.800672352

18.11089516

5.121080399

44

RRSE

7.844963551

1.902891994

20.23511314

7.552832127

MAE

0.006374944

0.004135238

0.010895703

0.004766957

MAE

0.007345116

0.007310798

0.015747491

0.007340153

MSE

5.56E-05

2.83E-05

0.000153706

4.77E-05

MSE

0.000189333

0.000147766

0.000360335

0.000149164

RMSE

0.007457202

0.005316389

0.012397833

0.006907908

RMSE

0.013759839

0.012155887

0.018982487

0.012213256

45

RRSE

10.45437813

0.651390254

19.24680138

5.191915035

45

RRSE

8.155870438

1.507307529

22.59509087

7.66785717

MAE

0.006592077

0.003863183

0.011521724

0.004941925

MAE

0.007575543

0.007452206

0.017352792

0.007620564

MSE

5.81E-05

2.68E-05

0.000168328

4.53E-05

MSE

0.000188691

0.000170676

0.000405739

0.000154215

RMSE

0.007621816

0.005178796

0.012974112

0.006730032

RMSE

0.013736469

0.01306429

0.020142958

0.012418327

46

RRSE

10.61807728

1.233188391

19.46906662

5.218859673

46

RRSE

7.501655579

2.184672356

21.69430161

6.992140293

MAE

0.006685753

0.003987074

0.011659158

0.005082067

MAE

0.007213502

0.007383095

0.016747108

0.007192067

MSE

5.99E-05

2.96E-05

0.000176384

4.58E-05

MSE

0.000186151

0.000156935

0.000390109

0.000141276

RMSE

0.007738289

0.005438189

0.013280966

0.006768197

RMSE

0.013643734

0.012527368

0.019751189

0.01188594

47

RRSE

9.759709358

0.827094018

16.87990952

4.776286602

47

RRSE

7.559007168

2.398530483

20.96367645

7.329694271

MAE

0.006323101

0.004230344

0.010144193

0.004519139

MAE

0.007169228

0.007043203

0.01611859

0.007584359

MSE

5.43E-05

3.37E-05

0.000139485

4.03E-05

MSE

0.000165541

0.000124824

0.000355144

0.000141277

RMSE

0.007367926

0.005805864

0.011810397

0.006344758

RMSE

0.012866286

0.01117248

0.018845253

0.011885989

48

RRSE

10.06562519

1.142641068

17.21339226

5.197535992

48

RRSE

8.001426697

1.666833878

21.05992889

7.729929924

MAE

0.006451075

0.004057381

0.010296236

0.004906729

MAE

0.007475972

0.007163189

0.01631864

0.007709148

MSE

5.75E-05

3.09E-05

0.000145904

4.70E-05

MSE

0.000189832

0.000145353

0.000376599

0.000173954

RMSE

0.00758173

0.00555834

0.012079089

0.006859277

RMSE

0.01377795

0.012056232

0.019406157

0.013189157

49

RRSE

9.89395237

1.163902521

19.32448006

4.780901432

49

RRSE

7.424761772

2.185619831

20.06874275

7.429775238

MAE

0.006421661

0.003922783

0.011622668

0.004716931

MAE

0.006954729

0.007167548

0.01556653

0.007249736

MSE

5.52E-05

2.94E-05

0.000170134

4.13E-05

MSE

0.000141296

0.000115186

0.000351289

0.000135532

RMSE

0.007431708

0.00541775

0.013043545

0.006426529

RMSE

0.011886783

0.010732458

0.018742692

0.011641831

50

RRSE

10.33056927

1.113586426

19.15169334

5.128182888

50

RRSE

7.693232059

1.633349657

20.70928001

7.254265308

MAE

0.006474213

0.003927531

0.011500327

0.004832438

MAE

0.007279074

0.007565951

0.016206015

0.007194425

MSE

5.80E-05

2.80E-05

0.000168874

4.67E-05

MSE

0.000186376

0.000190344

0.000366936

0.000156744

RMSE

0.007617989

0.005293685

0.01299517

0.006831192

RMSE

0.013651974

0.013796519

0.01915556

0.012519758

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Ilten, E., Calgan, H. & Demirtas, M. Design of induction motor speed observer based on long short-term memory. Neural Comput & Applic 34, 18703–18723 (2022). https://doi.org/10.1007/s00521-022-07458-0

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  • DOI: https://doi.org/10.1007/s00521-022-07458-0

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