### Abstract

Original language | English |
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Title of host publication | Proceedings of the 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017 |

Number of pages | 10 |

Publisher | American Society of Mechanical Engineers |

Publication date | Oct 2017 |

ISBN (Electronic) | 978-0-7918-5833-2 |

DOIs | |

Publication status | Published - Oct 2017 |

Event | 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017 - Sarasota, United States Duration: 16 Oct 2017 → 19 Oct 2017 |

### Conference

Conference | 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017 |
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Country | United States |

City | Sarasota |

Period | 16/10/2017 → 19/10/2017 |

### Fingerprint

### Cite this

*Proceedings of the 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017*American Society of Mechanical Engineers. https://doi.org/10.1115/FPMC2017-4260

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*Proceedings of the 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017.*American Society of Mechanical Engineers, 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017, Sarasota, United States, 16/10/2017. https://doi.org/10.1115/FPMC2017-4260

**Event-driven control of a speed varying digital displacement machine.** / Pedersen, Niels Henrik; Johansen, Per; Andersen, Torben O.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

TY - GEN

T1 - Event-driven control of a speed varying digital displacement machine

AU - Pedersen, Niels Henrik

AU - Johansen, Per

AU - Andersen, Torben O.

PY - 2017/10

Y1 - 2017/10

N2 - The design and analysis of feedback controllers for digital displacement machines requires a control oriented model. The displacement throughput of a full stroke operated machine is altered on a stroke-by-stroke basis at fixed rotation angles. In the case of a fixed speed operation, it may be treated as a Discrete Linear Time Invariant control problem with synchronous sampling rate. To make synchronous linear control theory applicable for a variable speed digital displacement machine, a method based on event-driven control is presented. Using this method, the time domain differential equations are converted into the spatial (position) domain to obtain a constant sampling rate and thus allowing for use of classical control theory. The method is applied to a down scaled digital fluid power motor, where the motor speed is controlled at varying references under varying pressure and load torque conditions. The controller synthesis is carried out as a discrete optimal deterministic problem with full state feedback. Based on a linear analysis of the feedback control system, stability is proven in a pre-specified operation region. Simulation of a non-linear evaluation model with the controller implemented shows great performance, both with respect to tracking and disturbance rejection.

AB - The design and analysis of feedback controllers for digital displacement machines requires a control oriented model. The displacement throughput of a full stroke operated machine is altered on a stroke-by-stroke basis at fixed rotation angles. In the case of a fixed speed operation, it may be treated as a Discrete Linear Time Invariant control problem with synchronous sampling rate. To make synchronous linear control theory applicable for a variable speed digital displacement machine, a method based on event-driven control is presented. Using this method, the time domain differential equations are converted into the spatial (position) domain to obtain a constant sampling rate and thus allowing for use of classical control theory. The method is applied to a down scaled digital fluid power motor, where the motor speed is controlled at varying references under varying pressure and load torque conditions. The controller synthesis is carried out as a discrete optimal deterministic problem with full state feedback. Based on a linear analysis of the feedback control system, stability is proven in a pre-specified operation region. Simulation of a non-linear evaluation model with the controller implemented shows great performance, both with respect to tracking and disturbance rejection.

U2 - 10.1115/FPMC2017-4260

DO - 10.1115/FPMC2017-4260

M3 - Article in proceeding

BT - Proceedings of the 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017

PB - American Society of Mechanical Engineers

ER -