The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2018
Filed:
Jun. 30, 2015
Applicant:
Japan Aerospace Exploration Agency, Tokyo, JP;
Inventors:
Hiroshi Kobayashi, Tokyo, JP;
Akira Nishizawa, Tokyo, JP;
Assignee:
JAPAN AEROSPACE EXPLORATION AGENCY, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64D 27/00 (2006.01); B64D 27/24 (2006.01); B64D 35/08 (2006.01); H02P 29/10 (2016.01); H02P 5/46 (2006.01);
U.S. Cl.
CPC ...
B64D 27/24 (2013.01); B64D 35/08 (2013.01); H02P 5/46 (2013.01); H02P 29/10 (2016.02); Y02T 50/44 (2013.01); Y02T 50/62 (2013.01);
Abstract
A motorized aircraft is controlled by a drive control means that rotationally drives a propulsion system propeller. The propulsion system propeller is driven by a plurality of electric motors. A comparison detection unit compares estimated propeller torque and estimated motor torque with each other and detects an abnormal state of an electric motor on the basis of the fact that a difference between the propeller torque and a multiple of the motor torque is above a predetermined value.