Title:
DISPLACEMENT CONTROL HYDROSTATIC PROPULSION SYSTEM FOR MULTIROTOR VERTICAL TAKE OFF AND LANDING AIRCRAFT
Document Type and Number:
WIPO Patent Application WO/2019/074859
Kind Code:
A3
Abstract:
A hydraulic propulsion system is disclosed. The system includes one or more input interfaces configured to receive mechanical power from a power source, four or more variable displacement pumps coupled to the one or more input interfaces adaptable to generate a controlled variable quantity of fluid to be pumped out of each of the variable displacement pumps in response to a control input from a corresponding control interface, and four or more positive displacement motors each fluidly coupled to a corresponding variable displacement pump and configured to receive the pumped fluid, wherein each motor is configured to be mechanically coupled to one or more aerodynamic rotors of a multi-rotor vertical take-off and landing aircraft to control thrust and attitude.
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Inventors:
SHANG LIZHI (US)
IVANTYSYNOVA MONIKA
IVANTYSYNOVA MONIKA
Application Number:
PCT/US2018/054890
Publication Date:
April 02, 2020
Filing Date:
October 08, 2018
Export Citation:
Assignee:
PURDUE RESEARCH FOUNDATION (US)
International Classes:
B64C27/00; B64C29/00; F04B17/00; F04B49/06; F04B49/12
Foreign References:
| US4856732A | 1989-08-15 | |||
| US4399886A | 1983-08-23 | |||
| US20160116053A1 | 2016-04-28 | |||
| US6044924A | 2000-04-04 |
Attorney, Agent or Firm:
PIROOZI, Hamid R. (US)
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