Control apparatus for a hydraulic excavator

• US 6,618,658 B1
• Filed: 01/13/2000
• Issued: 09/09/2003
• Est. Priority Date: 01/14/1999
• Status: Expired due to Fees

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: Kagoshima, Masayuki, Kinugawa, Hideki
• Primary Examiner(s): Nguyen, Tan Q.
• Assistant Examiner(s): Tran, Dalena
• Application Number:
  US09/482,088
• Time in Patent Office: 1,335 Days
• Field of Search: 701/50, 318/569, 318/600, 318/568.16, 318/574, 700/50, 706/4, 706/52, 706/900, 373/48, 379/07, 374/14, 172/4, 172/2, 172/4.5, 414/699
• US Class Current: 701/50
• CPC Class Codes: E02F 9/2207 for reducing or compensating oscillations
• CPC Class Codes: E02F 9/2235 including an electronic controller
• CPC Class Codes: E02F 9/2292 Systems with two or more pumps
• CPC Class Codes: E02F 9/2296 Systems with a variable displacement pump

Abstract

The control apparatus for a hydraulic excavator according to the present invention comprises: an operating amount sensor for detecting operating amounts of operating levers; a characteristic amount extraction portion for operating the characteristic amounts on the basis of the operating amount; a membership function memory portion for storing a plurality of membership functions; a fitness operation portion for operating fitnesses with respect to works for the characteristic amounts by applying the operated characteristic amounts to the membership functions; an operating characteristic set value memory portion for storing preset operating characteristic set values; and an operating characteristic operation portion for outputting the operating characteristic for controlling a hydraulic excavator on the basis of the fitnesses operated corresponding to a plurality of kinds of work and the stored operating characteristic set values. Therefore, the operating characteristic of the hydraulic excavator can be enhanced.

Claims

1. A control apparatus for a hydraulic excavator comprising:

an operating amount detection means for detecting operating amounts of operating levers corresponding to actuators for works of a hydraulic excavator;

a characteristic amount extraction means for extracting a characteristic amount showing a characteristic of operation of a hydraulic excavator on the basis of the operating amount detected;

a membership function memory means for storing a plurality of membership functions for a fuzzy inference preset corresponding to the characteristic amounts by kinds of work;

a fitness operation means for operating fitnesses relative to the works of the characteristic amount extracted by applying the characteristic amounts to the membership functions;

an operating characteristic set value memory means for storing operating characteristic set values preset corresponding to operating characteristics by kinds of work; and

an opening characteristic output means for outputting fitnesses operated corresponding to a plurality of kinds of work and operating characteristics for controlling a hydraulic excavator on the basis of the operating characteristics set values stored.

2. The control apparatus for a hydraulic excavator according to claim 1, wherein said operating characteristic output means is designed so that a load average with a fitness to a fuzzy rule describing a relationship between each characteristic amount and each work of an operating characteristic set value set every work being a weight is an output value of the operating characteristic.

3. The control apparatus for a hydraulic excavator according to claim 1, wherein said operating characteristic set value is grouped every kind of work having the same operating characteristic, and an operating characteristic for controlling the hydraulic excavator is output on the basis of the fitness every work group and the operating characteristic set value.

4. The control apparatus for a hydraulic excavator according to claim 3, wherein said operating characteristic output means is designed so that a load average with a fitness to a fuzzy rule describing a relationship between each characteristic amount and each work of an operating characteristic set value set every work being a weight is an output value of the operating characteristic.

5. The control apparatus for a hydraulic excavator according to claim 1, including a boom work, an arm work, a bucket work, and a swing work by said kinds of work.

6. A control apparatus for a hydraulic excavator comprising:

an operating amount detection means for detecting operating amounts of operating levers corresponding to actuators for works of a hydraulic excavator;

a characteristic amount extraction means for extracting a characteristic amount showing a characteristic of operation of a hydraulic excavator on the basis of the operating amount detected;

a membership function memory means for storing a plurality of membership functions for a fuzzy inference preset corresponding to the characteristic amounts by kinds of work; and

a fitness operation means for operating fitnesses relative to the works of the characteristic amount extracted by applying the operated characteristic amounts to the stored membership functions, characterized by comprising,

an operating characteristic set value memory means for storing operating characteristic set values preset corresponding to operating characteristics by kinds of work, and

an operating characteristic output means for outputting fitnesses operated corresponding to a plurality of kinds of work and operating characteristics for controlling a hydraulic excavator on the basis of the operating characteristics set values stored.