Energy-Efficient Power Assist Control Methods for Periodic Motions

Hatada, Kazuyoshi; Hirata, Kentaro; Yamada, K.; Otani, Shinji

doi:10.5687/iscie.25.28

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…This method is also known as pedaling force proportional control (PPC). 5 In this method, the power assist is based on the human torque input which is sensed using torque sensor. The power-assist relationship 6 of this method is presented in Figure 3, which can be written as…”

Section: Conventional Power-assist Methods For Pedelecmentioning

confidence: 99%

“…Various power-assist methods are available in the literature such as constant-assisted power (CAP), proportion-assisted power (PAP) and few advanced power-assist methods. 5,6 The mathematical model of the bicycle is presented in Astrom et al, 7 while comprehensive theoretical analysis and characterization of electric bicycles are reported in Muetze and Tan. 8 A fusion-based controller to assist the cyclist for stable riding is presented in Iuchi and Murakami.…”

Section: Introductionmentioning

confidence: 99%

“…Various power-assist methods are available in the literature such as constant-assisted power (CAP), proportion-assisted power (PAP) and few advanced power-assist methods. 5,6…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Power-assist control of a human–electric hybrid bicycle with energy regeneration and cruise control

Padmagirisan

Sowmya

Sankaranarayanan

2018

Proceedings of the Institution of Mechanical Engineers, Part I:

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In this article, we propose three different controllers for the human-electric hybrid bicycle. The main objective of the controller is to ensure power-assist, cruise control and regenerative braking whenever possible. Power-assist controller is designed without torque sensor, cruise controller is designed to keep constant speed and the regenerative braking controller is designed to save the energy while braking. Proportion-assisted power method is implemented using the pedaling torque estimated by disturbance observer. Cruise control is achieved using the estimated speed from the hall sensor rather than using actual speed sensor. Single switch regenerative braking method is applied to yield maximum energy recovery during braking. It is noted that the performance similar to torque sensor-based proportion-assisted power is achieved using torque sensorless approach. All of the proposed controllers are implemented experimentally in the experimental setup, and their results are presented.

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Section: Conventional Power-assist Methods For Pedelecmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Power-assist control of a human–electric hybrid bicycle with energy regeneration and cruise control

Padmagirisan

Sowmya

Sankaranarayanan

2018

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…According to these tendency, many researchers around the world had suggested electric bicycle system and its control methods. Kazuyoshi H. et al had suggested power assist control strategy from energy efficient point of view [3]. E.A.…”

Section: Introductionmentioning

confidence: 99%

Electric system design for electric reverse tricycle for the elderly

Choi

Son

Joe³

2013

2013 World Electric Vehicle Symposium and Exhibition (EVS27)

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This paper suggests electric reverse tricycle that has the Ackerman-Jantoud steering structure and the power assist system for the elderly. First of all, the required power point of view, driving power performance analysis of electric reverse tricycle is discussed for selecting diving system. for selecting motor and battery. After that system configuration for major electric components such as motor, inverter, battery and high level controller is described. And then, the communication system design among battery management system, inverter, display device and high level controller is discussed. Last of all, hardware and software design of the power assist system is fully described. The performance of the electric reverse tricycle is also described and evaluated experimentally.

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“…The RC was first applied in many motion control problems such as Hard Disk drives [19], Compact Disk players [20] and also in non rotatory motion control applications [21,22]. Afterwards, the aforementioned technique has been employed also in power assist applications to generate the auxiliary torque [23]. Moreover, the RC has been also successfully applied in the field of EABs.…”

Section: Introductionmentioning

confidence: 99%

Sensorless Pedalling Torque Estimation Based on Motor Load Torque Observation for Electrically Assisted Bicycles

et al. 2021

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The need for reducing the cost of and space in Electrically Assisted Bicycles (EABs) has led the research to the development of solutions able to sense the applied pedalling torque and to provide a suitable electrical assistance avoiding the installation of torque sensors. Among these approaches, this paper proposes a novel method for the estimation of the pedalling torque starting from an estimation of the motor load torque given by a Load Torque Observer (LTO) and evaluating the environmental disturbances that act on the vehicle longitudinal dynamics. Moreover, this work shows the robustness of this approach to rotor position estimation errors introduced when sensorless techniques are used to control the motor. Therefore, this method allows removing also position sensors leading to an additional cost and space reduction. After a mathematical description of the vehicle longitudinal dynamics, this work proposes a state observer capable of estimating the applied pedalling torque. The theory is validated by means of experimental results performed on a bicycle under different conditions and exploiting the Direct Flux Control (DFC) sensorless technique to obtain the rotor position information. Afterwards, the identification of the system parameters together with the tuning of the control system and of the LTO required for the validation of the proposed theory are thoroughly described. Finally, the capabilities of the state observer of estimating an applied pedalling torque and of recognizing the application of external disturbance torques to the motor is verified.

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Energy-Efficient Power Assist Control Methods for Periodic Motions

Cited by 6 publications

References 11 publications

Power-assist control of a human–electric hybrid bicycle with energy regeneration and cruise control

Power-assist control of a human–electric hybrid bicycle with energy regeneration and cruise control

Electric system design for electric reverse tricycle for the elderly

Sensorless Pedalling Torque Estimation Based on Motor Load Torque Observation for Electrically Assisted Bicycles

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