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:
Jan. 26, 1988
Filed:
Dec. 20, 1984
Larry B Carlisle, Vernon, CT (US);
Wayne R Spock, Canton, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
In an electronic engine control (EEC) for a turbine engine, a high rotor speed signal (N2SYNTH) is synthesized from a sensed low rotor speed signal (N1) in a primary control channel (32) so long as the low rotor speed signal is healthy. If the low rotor speed signal (N1) is not healthy, the primary channel is reconfigured (FIG. 3) so that a low rotor speed signal (N1SYNTH) is synthesized from a sensed high rotor speed signal (N2). A secondary control channel 34 provides standby signals for use in the EEC and performs similar logic as in the primary channel, except that signal synthesis (N2 from N1 and vice-versa) is dependent upon N2 health. When the high rotor speed signal (N2) is healthy, a low rotor speed signal (N1SYNTH) is synthesized from a sensed high rotor speed signal (N2). When the high rotor speed signal (N2) is not healthy, a high rotor speed signal (N2SYNTH) is synthesized from a sensed low rotor speed signal (N1). For each of the low and high rotor speeds, redundant signals (N1A, N1B and N2A, N2B, respectively) are available. Primary sensors (10A, 24A) for low and high rotor speeds (N1A, N2A) serve the primary channel, secondary sensors (10B, 24B) for low and high rotor speeds (N2A, N2B) serve the secondary channel, and cross-channel communication is via a link (39).