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Richard W. Longman

Richard W. Longman

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Mechanical and Aerospace Engineering 40 2002 1854 745 650 294 7434

Richard W. Longman publications per year

The chart shows the history of publications by Richard W. Longman between 1968 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Richard W. Longman published across 58 years, from 1968 to 2025, averaging 5.2 papers a year. Output peaked at 13 publications in 1993. 1 of the 302 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1968 to 2025. Vertical axis: number of publications, 0 to 13. Peak 13 publications in 1993. 1968: 2 publications 1969: 1 publication 1970: 3 publications 1971: 1 publication 1972: 2 publications 1973: 1 publication 1974: 1 publication 1975: 4 publications 1976: 4 publications 1977: 1 publication 1978: 2 publications 1979: 2 publications 1980: 2 publications 1981: 4 publications 1982: 11 publications 1983: 6 publications 1984: 4 publications 1985: 5 publications 1986: 7 publications 1987: 3 publications 1988: 8 publications 1989: 8 publications 1990: 10 publications 1991: 10 publications 1992: 10 publications 1993: 13 publications 1994: 7 publications 1995: 5 publications 1996: 5 publications 1997: 7 publications 1998: 12 publications 1999: 6 publications 2000: 5 publications 2001: 2 publications 2002: 11 publications 2003: 9 publications 2004: 10 publications 2005: 12 publications 2006: 9 publications 2007: 2 publications 2008: 9 publications 2009: 0 publications 2010: 1 publication 2011: 4 publications 2012: 8 publications 2013: 4 publications 2014: 9 publications 2015: 5 publications 2016: 3 publications 2017: 6 publications 2018: 3 publications 2019: 1 publication 2020: 5 publications 2021: 13 publications 2022: 1 publication 2023: 2 publications 2024: 0 publications 2025: 1 publication
1968 2025

302 publications in total across all disciplines

View publications per year as a table
Richard W. Longman: publications per year, 1968 to 2025
Year Publications
1968 2
1969 1
1970 3
1971 1
1972 2
1973 1
1974 1
1975 4
1976 4
1977 1
1978 2
1979 2
1980 2
1981 4
1982 11
1983 6
1984 4
1985 5
1986 7
1987 3
1988 8
1989 8
1990 10
1991 10
1992 10
1993 13
1994 7
1995 5
1996 5
1997 7
1998 12
1999 6
2000 5
2001 2
2002 11
2003 9
2004 10
2005 12
2006 9
2007 2
2008 9
2009 0
2010 1
2011 4
2012 8
2013 4
2014 9
2015 5
2016 3
2017 6
2018 3
2019 1
2020 5
2021 13
2022 1
2023 2
2024 0
2025 1
Total 302
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Richard W. Longman publication distribution in Mechanical and Aerospace Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Richard W. Longman sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 63 bars. Horizontal axis: publications, 47–56 to 659+. Vertical axis: number of scientists, 0 to 155. Most scientists, 155, have 147–156 publications. The last bar groups every scientist with 659 publications or more. The highlighted bar, 287–296 publications, is where this scientist sits. 47–56 publications: 10 scientists 57–66 publications: 23 scientists 67–76 publications: 32 scientists 77–86 publications: 62 scientists 87–96 publications: 67 scientists 97–106 publications: 91 scientists 107–116 publications: 113 scientists 117–126 publications: 115 scientists 127–136 publications: 130 scientists 137–146 publications: 140 scientists 147–156 publications: 155 scientists 157–166 publications: 132 scientists 167–176 publications: 133 scientists 177–186 publications: 130 scientists 187–196 publications: 140 scientists 197–206 publications: 115 scientists 207–216 publications: 125 scientists 217–226 publications: 117 scientists 227–236 publications: 99 scientists 237–246 publications: 92 scientists 247–256 publications: 100 scientists 257–266 publications: 95 scientists 267–276 publications: 88 scientists 277–286 publications: 77 scientists 287–296 publications: 74 scientists 297–306 publications: 74 scientists 307–316 publications: 62 scientists 317–326 publications: 70 scientists 327–336 publications: 59 scientists 337–346 publications: 58 scientists 347–356 publications: 45 scientists 357–366 publications: 44 scientists 367–376 publications: 36 scientists 377–386 publications: 41 scientists 387–396 publications: 32 scientists 397–406 publications: 23 scientists 407–416 publications: 28 scientists 417–426 publications: 27 scientists 427–436 publications: 25 scientists 437–446 publications: 23 scientists 447–456 publications: 23 scientists 457–466 publications: 20 scientists 467–476 publications: 12 scientists 477–486 publications: 24 scientists 487–496 publications: 18 scientists 497–506 publications: 12 scientists 507–516 publications: 13 scientists 517–526 publications: 21 scientists 527–536 publications: 12 scientists 537–546 publications: 8 scientists 547–556 publications: 16 scientists 557–566 publications: 3 scientists 567–576 publications: 11 scientists 577–586 publications: 6 scientists 587–596 publications: 5 scientists 597–606 publications: 6 scientists 607–616 publications: 7 scientists 617–626 publications: 7 scientists 627–636 publications: 10 scientists 637–646 publications: 4 scientists 647–656 publications: 3 scientists 657–658 publications: 2 scientists 659+ publications: 100 scientists
47–56 publications 659+

This scientist: 294 publications — 71st percentile

71% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 659 publications or more.

View publications distribution as a table
Number of Mechanical and Aerospace Engineering scientists by publication count, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
Publications Scientists This scientist
47–56 10
57–66 23
67–76 32
77–86 62
87–96 67
97–106 91
107–116 113
117–126 115
127–136 130
137–146 140
147–156 155
157–166 132
167–176 133
177–186 130
187–196 140
197–206 115
207–216 125
217–226 117
227–236 99
237–246 92
247–256 100
257–266 95
267–276 88
277–286 77
287–296 74 294
297–306 74
307–316 62
317–326 70
327–336 59
337–346 58
347–356 45
357–366 44
367–376 36
377–386 41
387–396 32
397–406 23
407–416 28
417–426 27
427–436 25
437–446 23
447–456 23
457–466 20
467–476 12
477–486 24
487–496 18
497–506 12
507–516 13
517–526 21
527–536 12
537–546 8
547–556 16
557–566 3
567–576 11
577–586 6
587–596 5
597–606 6
607–616 7
617–626 7
627–636 10
637–646 4
647–656 3
657–658 2
659+ 100
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Richard W. Longman D-index placement in Mechanical and Aerospace Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Richard W. Longman sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 64 bars. Horizontal axis: D-Index, 30 to 93+. Vertical axis: number of scientists, 0 to 189. Most scientists, 189, have 34 D-Index. The last bar groups every scientist with 93 D-Index or more. The highlighted bar, 40 D-Index, is where this scientist sits. 30 D-Index: 83 scientists 31 D-Index: 113 scientists 32 D-Index: 144 scientists 33 D-Index: 153 scientists 34 D-Index: 189 scientists 35 D-Index: 158 scientists 36 D-Index: 139 scientists 37 D-Index: 127 scientists 38 D-Index: 130 scientists 39 D-Index: 126 scientists 40 D-Index: 104 scientists 41 D-Index: 100 scientists 42 D-Index: 107 scientists 43 D-Index: 101 scientists 44 D-Index: 103 scientists 45 D-Index: 79 scientists 46 D-Index: 88 scientists 47 D-Index: 70 scientists 48 D-Index: 83 scientists 49 D-Index: 44 scientists 50 D-Index: 64 scientists 51 D-Index: 56 scientists 52 D-Index: 50 scientists 53 D-Index: 48 scientists 54 D-Index: 58 scientists 55 D-Index: 52 scientists 56 D-Index: 48 scientists 57 D-Index: 42 scientists 58 D-Index: 34 scientists 59 D-Index: 42 scientists 60 D-Index: 37 scientists 61 D-Index: 42 scientists 62 D-Index: 44 scientists 63 D-Index: 22 scientists 64 D-Index: 33 scientists 65 D-Index: 29 scientists 66 D-Index: 23 scientists 67 D-Index: 29 scientists 68 D-Index: 24 scientists 69 D-Index: 19 scientists 70 D-Index: 34 scientists 71 D-Index: 26 scientists 72 D-Index: 19 scientists 73 D-Index: 18 scientists 74 D-Index: 19 scientists 75 D-Index: 14 scientists 76 D-Index: 19 scientists 77 D-Index: 8 scientists 78 D-Index: 18 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 17 scientists 82 D-Index: 11 scientists 83 D-Index: 16 scientists 84 D-Index: 7 scientists 85 D-Index: 9 scientists 86 D-Index: 8 scientists 87 D-Index: 6 scientists 88 D-Index: 6 scientists 89 D-Index: 7 scientists 90 D-Index: 10 scientists 91 D-Index: 4 scientists 92 D-Index: 4 scientists 93+ D-Index: 100 scientists
30 D-Index 93+

This scientist: 40 D-Index — 43rd percentile

43% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 93 D-Index or more.

View D-Index distribution as a table
Number of Mechanical and Aerospace Engineering scientists by D-index, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
D-Index Scientists This scientist
30 83
31 113
32 144
33 153
34 189
35 158
36 139
37 127
38 130
39 126
40 104 40
41 100
42 107
43 101
44 103
45 79
46 88
47 70
48 83
49 44
50 64
51 56
52 50
53 48
54 58
55 52
56 48
57 42
58 34
59 42
60 37
61 42
62 44
63 22
64 33
65 29
66 23
67 29
68 24
69 19
70 34
71 26
72 19
73 18
74 19
75 14
76 19
77 8
78 18
79 16
80 12
81 17
82 11
83 16
84 7
85 9
86 8
87 6
88 6
89 7
90 10
91 4
92 4
93+ 100
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Overview

Richard W. Longman is affiliated with Columbia University in the United States. Their research primarily focuses on the field of Engineering, with significant contributions to Control and Systems Engineering, Mechanical Engineering, and Computational Mechanics.

Longman's work covers multiple main topics, including:

  • Iterative Learning Control Systems
  • Piezoelectric Actuators and Control
  • Control Systems in Engineering
  • Advanced Measurement and Metrology Techniques
  • Advanced Machining Processes and Optimization
  • Dynamics and Control of Mechanical Systems
  • Hydraulic and Pneumatic Systems

Frequent publication venues for their research include:

  • The Journal of the Astronautical Sciences
  • arXiv (Cornell University)
  • International Journal of Robust and Nonlinear Control
  • IEEE Transactions on Neural Networks and Learning Systems
  • Systems & Control Letters

Among Longman's recent papers are:

  • "Stability of Sliding Mode ILC Design for a Class of Nonlinear Systems With Unknown Control Input Delay," 2021, IEEE Transactions on Neural Networks and Learning Systems
  • "An adaptive smooth second-order sliding mode repetitive control method with application to a fast periodic stamping system," 2021, Systems & Control Letters
  • "Iterative Learning Control Inverse Problem Using Harmonic Frequency Filters," 2021, The Journal of the Astronautical Sciences
  • "Low-order sliding mode repetitive control for discrete-time systems under complex disturbance environment," 2021, International Journal of Robust and Nonlinear Control
  • "Identification of the Dynamics in the Singular Vectors of the System Toeplitz Matrix of Markov Parameters," 2022, The Journal of the Astronautical Sciences

Frequent co-authors collaborating with Longman include:

  • Chao Jia
  • Jer-Nan Juang
  • Enzeng Dong
  • Benjamas Panomruttanarug
  • Xiaoyu Zhang

Best Publications

  • Iterative learning control and repetitive control for engineering practice

    Richard W. Longman

  • Identification of observer/Kalman filter Markov parameters - Theory and experiments

    Jer-Nan Juang;Minh Phan;Lucas G. Horta;Richard W. Longman

  • Satellite-mounted robot manipulators- new kinematics and reaction moment compensation

    R. W. Longman;R. E. Lindberg;M. F. Zedd

  • Identification of linear structural systems using earthquake‐induced vibration data

    H. Luş;R. Betti;R. W. Longman

  • On-line identification of non-linear hysteretic structural systems using a variable trace approach

    Jeng-Wen Lin;Raimondo Betti;Andrew W. Smyth;Richard W. Longman

  • Active Control Technology for Large Space Structures

    D. C. Hyland;J. L. Junkins;R. W. Longman

  • Simple learning control made practical by zero-phase filtering: applications to robotics

    H. Elci;R.W. Longman;M.Q. Phan;Jer-Nan Juang

  • A mathematical theory of learning control for linear discrete multivariable systems

    Minh Phan;Richard W. Longman

  • A method for improving the dynamic accuracy of a robot performing a repetitive task

    Richard H. Middleton;Graham C. Goodwin;Richard W. Longman

  • Linear system identification via an asymptotically stable observer

    M. Phan;L. G. Horta;J. N. Juang;R. W. Longman

  • On the Theory and Design of Linear Repetitive Control Systemsg

    Richard W. Longman

  • Discrete frequency based learning control for precision motion control

    H. Elci;R.W. Longman;Minh Phan;Jer-Nan Juang

  • Extracting Physical Parameters of Mechanical Models From Identified State-Space Representations

    M. De Angelis;H. Luş;R. Betti;R. W. Longman

  • On the Number and Placement of Actuators for Independent Modal Space Control

    R. E. Lindberg;R. W. Longman

  • Constructing Second-Order Models of Mechanical Systems from Identified State Space Realizations. Part I: Theoretical Discussions

    Hilmi Luş;Maurizio De Angelis;Raimondo Betti;Richard W. Longman

  • Comparison Of Several System Identification Methods For Flexible Structures

    J.-S. Lew;Jer-Nan Juang;Richard W. Longman

  • A degree of controllability definition - Fundamental concepts and application to modal systems

    C. N. Viswanathan;R. W. Longman;P. W. Likins

  • Identification of observer/Kalman filter Markov parameters: Theory and experiments

    Jer-Nan Juang;Minh Phan;Lucas G. Horta;Richard W. Longman

  • Improvement of Observer/Kalman Filter Identification (OKID) by Residual Whitening

    Minh Phan;Lucas G. Horta;Jer-Nan Juang;Richard W. Longman

  • Assessment of human locomotion by using an insole measurement system and artificial neural networks

    Kuan Zhang;Kuan Zhang;Ming Sun;D. Kevin Lester;F. Xavier Pi-Sunyer;F. Xavier Pi-Sunyer

Frequent Co-Authors

Jer-Nan Juang
Jer-Nan Juang National Cheng Kung University
Raimondo Betti
Raimondo Betti Columbia University
Hans Bock
Hans Bock Goethe University Frankfurt
Gangbing Song
Gangbing Song University of Houston
Nejat Olgac
Nejat Olgac University of Connecticut
Ferdinand Freudenstein
Ferdinand Freudenstein Columbia University
Konstantin Avrachenkov
Konstantin Avrachenkov French Institute for Research in Computer Science and Automation - INRIA
F. Xavier Pi-Sunyer
F. Xavier Pi-Sunyer Columbia University
Ranjan Mukherjee
Ranjan Mukherjee Michigan State University
Kuan Zhang
Kuan Zhang University of Nebraska–Lincoln

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