Reducing the Vibrations of an Unbalanced Rotary Engine by Active Force Control

In this article, the Active Force Control (AFC) method is implemented for reducing the vibrations that are caused by an unbalanced rotary engine. By using Matlab Simulink, the dynamic model of an unbalanced rotary engine was simulated. Then a Proportional–Integral–Derivative PID controller with the AFC loop was added. The obtained simulation results proved that when the PID controller was operating without the AFC loop, the vibrations were reduced but with very less efficiency when compared to the case in which the AFC loop was engaged with the PID controller. This means that the amplitude of vibrations was extremely reduced when the PID controller was equipped with the AFC loop, and the same results were observed for the frequency domain case. The robustness of the AFC method was also tested and again the method of AFC was very capable in reducing the vibrations.

Active Force Control, PID, Unbalanced rotary engine, Vibrations

Burdess, J.S., Hewit, J.R., 1986. An Active Method for the Control of Mechanical Systems in the Presence of Unmeasurable Forcing. Mechanism and Machine Theory, Volume 21(5), pp. 393–400

Crede, C.E., 1951. Vibration and Shock Isolation. Wiley, New York

Hashemi-Dehkordi, S.M., Abu Bakar, A.R., Mailah, M., 2012. Reducing Friction-induced Vibration using Intelligent Active Force Control (AFC) with Piezoelectric Actuators. SADHANA - Academy Proceedings in Engineering Sciences, Volume 37, Part 6, pp. 637–655

Hashemi-Dehkordi, S.M., Abu Bakar, A.R., Mailah, M., 2014. Stability Analysis of a Linear Friction-induced Vibration Model and Its Prevention using Active Force Control. Advances in Mechanical Engineering, Volume 2014, pp. 1–13

Hashemi-Dehkordi, S.M., Mailah, M., Abu Bakar, A.R., 2009a. Implementation of Active Force Control to Disk Brake Noise-free Performance. International Review of Mechanical Engineering (IREME), Volume 3(4), pp.481–488

Hashemi-Dehkordi, S.M., Mailah, M., Abu Bakar, A.R., 2009b. Intelligent Active Force Control with Piezoelectric Actuators to Reduce Friction Induced Vibration due to Negative Damping. International Review of Electrical Engineering (IREE), Volume 4(6), pp. 1294–1305

Hashemi-Dehkordi, S.M., Mailah, M., Abu Bakar, A.R., 2010. Suppressing Friction-induced Vibration due to Negative Damping and Mode Coupling Effects using Active Force Control. Australian Journal of Basic and Applied Sciences, Volume 4(8), pp. 3917–3933

Hewit J.R., Burdess, J.S., 1981. Fast Dynamic Decoupled Control for Robotics using Active Force Control. Trans. on Mechanism and Machine Theory, Volume 16(5), pp. 535–542

Kolhar, S.S., Patel, D.R., 2013. Optimization of a Drum Type Washing Machine by Analytical and Computational Assessment. International Journal of Scientific & Engineering Research, Volume 4(6), pp. 2759–2764

Mailah, M., 1998. Intelligent Active Force Control of a Rigid Robot Arm using Neural Network and Iterative Learning Algorithms. Ph.D Thesis, University of Dundee, UK

Mailah, M., Jahanabadi, H., Zain, M.Z.M., Priyandoko, G., 2009. Modelling and Control of Human-like Arm Incorporating Muscle Models. Proc. of

IMechE Part C: Journal of Mechanical Engineering Science, Volume 223, pp. 1569–1577

Mailah, M., Rahim, N.I.A., 2000. Intelligent Active Force Control of a Robot Arm using Fuzzy Logic. Proceedings of IEEE International Conference on Intelligent Systems and Technologies. Kuala Lumpur, Malaysia, Volume 2, pp. 291–296

Ogbonnaya, E.A., Ugwu, H.U., Poku, R., Adigio, E.M., 2013. Active Condition Monitoring of a Marine Gas Turbine through Rotor Shaft Vibration Analysis. American Journal of Mechanical Engineering, Volume 1(4), pp. 82–88

Rao, S.S., 2011. Mechanical Vibrations (5th edition). Prentice Hall

Ruzicka, J.E., 1969. Active Vibration and Shock Isolation. SAE Transactions, Volume 77, pp. 2872–2886

Soliman, J.I., Hallam, M.G., 1968. Vibration Isolation between Non-rigid Machines and Non-Rigid Foundations. Journal of Sound and Vibration, Volume 8, pp. 329–351

Vilnay, O., 1984. Active Control of Machinery Foundation. Journal of Engineering Mechanics, ASCE, Volume 110, pp. 273–281

Warminski, J., Balthazar, J.M., 2003. Vibrations of a Parametrically and Self-excited System with Ideal and Non-ideal Energy Sources. Journal of the Brazilian Society of Mechanical, Sciences & Engineering by ABCM, Volume 25(4), pp. 413–419