Vibration Reduction in Rolling Piston-Type Compressors through Motor Torque Control. Basic Study on Theoretical Analysis and Computer Simulation.

Nakamura, Masatoshi; Hata, Hideaki; Nakamura, Yozo; Endo, Tsunehiro; Iizuka, Kenichi

doi:10.1299/jsmec1988.34.200

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The concept of using motor to actively damp the vibration has been investigated by many research groups worldwide. This concept was firstly applied to suppress vibration in the rolling piston type compressor in the air conditioner by utilizing an alternator [8], [9]. This concept was then re-adopted by Yuzo Kadomukai at Hitachi to reduce the vehicle idling vibration caused by the engine torque pulses from the individual cylinder combustion by using a motor generator instead of an alternator based on the repetitive learning control algorithm [10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method to Actively Damp the Vibration of the Hybrid Powertrain by Utilizing a Flywheel Integrated-Starter-Generator

Yang

et al. 2020

IEEE Access

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In this paper, a novel method to actively damp the powertrain vibration by utilizing a flywheel integrated starter generator (FISG) is proposed and validated on the testbench. A more light-weighted, economical, and compact hybrid powertrain devoid of clutches or dampers is built by replacing its flywheel with the ISG rotor. Motor torque having the opposite phase of the engine torque is applied to reduce the vibration. As opposed to the passive methods, which usually make use of the inertial and/or the damping properties of the components to absorb the vibration, this active approach is defined as active damping. Firstly, active damping is proved to be theoretically feasible by simulation based on an engine torque observer. To get the practical-application-oriented motor torque waveform, the observer torque is then processed by considering some realistic factors, such as the motor's response delay and the torque demand limit at MCU (Motor Control Unit), and is finally simplified as the rectangular waveform by off-line simulation. Secondly, an algorithm operating on the original resolver aimed at calculating the real-time crank position is proposed and programmed directly in the MCU. Finally, active damping is realized online utilizing a feedforward method by programming the crank-torque table in MCU. Experiments in both stable and transient conditions are conducted. Results show that active damping can attenuate the vibration effectively, especially over low speed and load ranges. The speed fluctuation range and the cyclic squared angular acceleration can be reduced by 79.7% and 89.7% respectively at 700 rpm when cranking. The crank vibration in transient conditions, including dragging and free deceleration, can also be suppressed, showing potential to realize fast and quiet engine start and halt.INDEX TERMS Active damping, crank position calculation, engine torque cancellation, flywheel ISG, hybrid powertrain.

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Section: Introductionmentioning

confidence: 99%

A Novel Method to Actively Damp the Vibration of the Hybrid Powertrain by Utilizing a Flywheel Integrated-Starter-Generator

Yang

et al. 2020

IEEE Access

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“…If the controller works properly, the signal sent in the actuator will generate a sound wave that will cancel the disturbance sound wave at the location of the quiet zone. Detailed presentations of active sound control theory and applications can be found in [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Active random noise control using adaptive learning rate neural networks with an immune feedback law

Sasaki

Kuribayashi

Ito

et al. 2011

JAE

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In this paper an active random noise control using adaptive learning rate neural networks is presented. The adaptive learning rate strategy increases the learning rate by a small constant if the current partial derivative of the objective function with respect to the weight and the exponential average of the previous derivatives have the same sign, otherwise the learning rate is decreased by a proportion of its value. The use of an adaptive learning rate attempts to keep the learning step size as large as possible without leading to oscillation. It is expected that a cost function minimize rapidly and training time is decreased. Numerical simulations and experiments of active random noise control with the transfer function of the error path will be performed, to validate the convergence properties of the adaptive learning rate Neural Networks. Control results show that adaptive learning rate Neural Networks control structure can outperform linear controllers and conventional neural network controller for the active random noise control.

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Vibration analysis of rolling piston-type compressors driven by single-phase induction motors

Young

Liu

Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics

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Rolling piston-type compressors [l], [2] driven by single-phase induct,ion motors are widely used in low power room air conditioners. Since a rolling piston-type compressor represents an eccentric load to the mot.or, vibration problems associated with the compressor and motor drive assemhly always occur. Furthermore, for ease of darting, a single-phase induction motor is usually designed with unsymmetrical stator windings, which is far more difficult to be analyzed as compared to a typical symniet,rical t.lirec-phase indnction motor. This paper est.ahlislies t,he state-space model for a rolling piston-type compressor driven by a single-phase indudon motor. An inverter is proposed for driving t,he motor-compressor assembly. By varying the line frequency and voltage magnit.ndes on both primary and secondary windings of the induction mot.or, this paper seeks t.o reduce t.he vibration accompanied with the motor-compressor assembly of a room air conditioner. The paper presents some useful design crit,eria for reducing vibrations based on computer simulation result,^.performance as compared to other approaches, computer simulation is conduct.ed in Section IV. The simulation st,udies several control configurations and compare their performance in terms of speed, torque, and current fluctuations. The aim is to choose a control configurat,ion that can reduce most motor-compressor vibrat,ions. Simulat.ion resu1t.s show that the proposed constant V / f cont,rol is a promising candidat.e. Finally, some concluding remarks are given in Section V.

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Vibration Reduction in Rolling Piston-Type Compressors through Motor Torque Control. Basic Study on Theoretical Analysis and Computer Simulation.

Cited by 4 publications

References 3 publications

A Novel Method to Actively Damp the Vibration of the Hybrid Powertrain by Utilizing a Flywheel Integrated-Starter-Generator

A Novel Method to Actively Damp the Vibration of the Hybrid Powertrain by Utilizing a Flywheel Integrated-Starter-Generator

Active random noise control using adaptive learning rate neural networks with an immune feedback law

Vibration analysis of rolling piston-type compressors driven by single-phase induction motors

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