{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,15]],"date-time":"2025-11-15T17:09:25Z","timestamp":1763226565212,"version":"build-2065373602"},"reference-count":24,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2018,3,2]],"date-time":"2018-03-02T00:00:00Z","timestamp":1519948800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>High-performance position control can be improved by the compensation of disturbances for a gear-driven control system. This paper presents a mode-free disturbance observer (DOB) based on sensor-fusion to reduce some errors related disturbances for a gear-driven gimbal. This DOB uses the rate deviation to detect disturbances for implementation of a high-gain compensator. In comparison with the angular position signal the rate deviation between load and motor can exhibits the disturbances exiting in the gear-driven gimbal quickly. Due to high bandwidth of the motor rate closed loop, the inverse model of the plant is not necessary to implement DOB. Besides, this DOB requires neither complex modeling of plant nor the use of additive sensors. Without rate sensors providing angular rate, the rate deviation is easily detected by encoders mounted on the side of motor and load, respectively. Extensive experiments are provided to demonstrate the benefits of the proposed algorithm.<\/jats:p>","DOI":"10.3390\/s18030754","type":"journal-article","created":{"date-parts":[[2018,3,2]],"date-time":"2018-03-02T11:53:40Z","timestamp":1519991620000},"page":"754","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Combining Load and Motor Encoders to Compensate Nonlinear Disturbances for High Precision Tracking Control of Gear-Driven Gimbal"],"prefix":"10.3390","volume":"18","author":[{"given":"Tao","family":"Tang","sequence":"first","affiliation":[{"name":"Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China"},{"name":"Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sisi","family":"Chen","sequence":"additional","affiliation":[{"name":"Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China"},{"name":"Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China"},{"name":"Department of Mechanical engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuanlin","family":"Huang","sequence":"additional","affiliation":[{"name":"Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China"},{"name":"Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China"},{"name":"Department of Mechanical engineering, University of Chinese Academy of Sciences, Beijing 100039, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China"},{"name":"Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bo","family":"Qi","sequence":"additional","affiliation":[{"name":"Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China"},{"name":"Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,3,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Akbari, M., Kheibari, H.Z., and Nejad, A.S.M. (2013, January 13\u201315). Timing belt gearbox in Ballbot robot. Proceedings of the First RSI\/ISM International Conference on Robotics and Mechatronics, Tehran, Iran.","DOI":"10.1109\/ICRoM.2013.6510146"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Keller, J. (2015, January 17). Gearbox Reliability Collaborative: Gearbox 3 Manufacturing Status. Proceedings of the NREL (National Renewable Energy Laboratory), Gearbox Reliability Collaborative All-Members Meeting, Boulder, Colorado.","DOI":"10.2172\/1215122"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Mousavi, A., Akbarzadeh, A., and Shariatee, M. (2015, January 7\u20139). Salman Alimardani Repeatability analysis of a SCARA robot with planetary gearbox. Proceedings of the 3rd RSI International Conference on Robotics and Mechatronics, Tehran, Iran.","DOI":"10.1109\/ICRoM.2015.7367858"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Mcfadden, S., and Basu, B. (2016). Wind turbine gearbox design with drivetrain dynamic analysis. Offshore Wind Farms, Elsevier Ltd.","DOI":"10.1016\/B978-0-08-100779-2.00007-6"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Lemmer, L., and Kiss, B. (2006, January 3\u20135). Modeling, Identification, and control of Harmonic Drives for Mobile Vehicles. Proceedings of the IEEE Conference on Mechatronics, Budapest, Hungary.","DOI":"10.1109\/ICMECH.2006.252555"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1109\/TMECH.2006.878540","article-title":"Improved torque fidelity in harmonic drive sensors through the union of two existing strategies","volume":"11","author":"Sensinger","year":"2006","journal-title":"IEEE\/ASME Trans. Mechatron."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"178","DOI":"10.1109\/TMECH.2014.2311382","article-title":"Modeling of Torsional Compliance and Hysteresis Behaviors in Harmonic Drives","volume":"20","author":"Zhang","year":"2015","journal-title":"IEEE\/ASME Trans. Mechatron."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Zhao, Z., Xie, W., and Zhu, W. (2007, January 5\u20138). Fuzzy Optimal Control for Harmonic Drive System with Friction Variation with Temperature. Proceedings of the International Conference on Mechatronics and Automation (ICMA), Harbin, China.","DOI":"10.1109\/ICMA.2007.4304095"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/j.sysconle.2008.10.001","article-title":"Control of mechanical systems with Stribeck friction and backlash","volume":"58","author":"Lantos","year":"2009","journal-title":"Syst. Control Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1633","DOI":"10.1016\/S0005-1098(02)00047-X","article-title":"Controlling mechanical systems with backlash\u2014A survey","volume":"38","author":"Nordin","year":"2002","journal-title":"Automatica"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Robertz, S.G., Halt, L., Kelkar, S., Nilsson, K., Robertsson, A., Sch\u00e5r, D., and Schiffer, J. (2010, January 3\u20137). Precise robot motions using dual motor control. Proceedings of the IEEE International Conference on Robotics and Automation, Anchorage, AK, USA.","DOI":"10.1109\/ROBOT.2010.5509384"},{"key":"ref_12","unstructured":"He, C., Zhang, Y., and Meng, M. (August, January 29). Backlash compensation by neuralnetwork online learning. Proceedings of the IEEE International Symposium on Computational Intelligence in Robotics and Automation, Banff, AB, Canada."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Kobayashi, T., Shimono, T., and Ohnishi, K. (2008, January 10\u201313). An experimental validation of haptic thrust wire for precise flexible actuation. Proceedings of the 34th AnnualIEEE Conference of Industrial Electronics (IECON), Orlando, FL, USA.","DOI":"10.1109\/IECON.2008.4758350"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Yamada, S., and Fujimoto, H. (2016, January 23\u201326). Proposal of high backdrivable control using load-side encoder and backlash. Proceedings of the 42nd Annual Conference of the IEEE Industrial Electronics Society (IECON 2016), Florence, Italy.","DOI":"10.1109\/IECON.2016.7793320"},{"key":"ref_15","unstructured":"Gebler, D., and Holtz, J. (September, January 31). Identification and compensation of gear backlash without output position sensor in high-precision servo systems. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (IECON \u201998), Aachen, Germany."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"973","DOI":"10.1016\/j.conengprac.2004.10.016","article-title":"Estimation of backlash phenomenon in the electromechanical actuator","volume":"13","author":"Merzouki","year":"2005","journal-title":"Control Eng. Pract."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Kolnik, I., and Agranovich, G. (2012, January 14\u201317). Backlash compensation for motion system with elastic transmission. Proceedings of the 2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, Eilat, Israel.","DOI":"10.1109\/EEEI.2012.6377140"},{"key":"ref_18","first-page":"514","article-title":"Compensation of Backlash for Geared Drive Systems and Thrust Wires Used in Teleoperation","volume":"4","author":"Prasanga","year":"2015","journal-title":"IEEJ J. Ind. Appl."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1109\/MCS.2007.910256","article-title":"Inertially stabilized platform technology Concepts and principles","volume":"28","author":"Hilkert","year":"2008","journal-title":"IEEE Control Syst. Mag."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"513","DOI":"10.1109\/87.784416","article-title":"Disturbance observer and feedforward design for a high-speed direct-drive positioning table","volume":"7","author":"Kempf","year":"1999","journal-title":"IEEE Trans. Control Syst. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1207","DOI":"10.1109\/TIE.2003.819695","article-title":"Advanced disturbance observer design for mechanical positioning systems","volume":"50","author":"Kim","year":"2003","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"351","DOI":"10.1016\/j.measurement.2017.07.026","article-title":"A New Computational Approach for Estimation of Wilting Point for Green Infrastructure","volume":"111","author":"Garg","year":"2017","journal-title":"Measurement"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1016\/j.measurement.2017.09.009","article-title":"An Application of Evolutionary System Identification Algorithm in modelling of Energy Production System","volume":"114","author":"Huang","year":"2017","journal-title":"Measurement"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1436","DOI":"10.1002\/er.3723","article-title":"Design of robust battery capacity model for electric vehicle by incorporation of uncertainties","volume":"41","author":"Garg","year":"2017","journal-title":"Int. J. Energy Res."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/3\/754\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T14:57:15Z","timestamp":1760194635000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/3\/754"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,3,2]]},"references-count":24,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2018,3]]}},"alternative-id":["s18030754"],"URL":"https:\/\/doi.org\/10.3390\/s18030754","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2018,3,2]]}}}