[특허]Method and apparatus for improving the accuracy of closed loop controlled systems

Method and apparatus for improving the accuracy of closed loop controlled systems 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G05B-017/02 G01G-013/00
출원번호	US-0594822 (1990-10-09)
우선권정보	DE-3933471 (1989-10-06)
발명자 / 주소	Allenberg Bernd (Karlsruhe DEX)
출원인 / 주소	Carl Schenck AG (Darmstadt DEX 03)
인용정보	피인용 횟수 : 49 인용 특허 : 0

초록 ▼

The precision of a closed loop control system, for example of a loss-in-weight feeder, having a controlled operating section and a closed loop controlling section, is improved by adjusting the closed loop controlling section with regard to at least two stochastic precision disturbing signals. One such signal may represent disturbances that affect a sensor for ascertaining the actual weight of the scale. The other value may represent estimated bulk material density variations or disturbances. A model generator (7) provides spectra representing these disturbing values. A noise parameter estimator (17) selects those spectra most closely resembling the spectra of the disturbing values for producing an adjusting signal that is used to adapt the closed loop controlling section (5) to an optimal control. The closed loop controlling section (5) has connected thereto an evaluating circuit (14) including the model generator (7) for performing the correction or adjustment.

대표청구항 ▼

A method for improving the control precision of a closed loop controlled system including a controlled operating section and a controlling section, comprising the following steps: (a) sampling by a sensor an actual operational value of said controlled operating section and estimating another actual value from said sampled actual value; (b) providing a set point signal and producing a closed loop control signal from said estimated actual operation signal and from said set point signal for controlling said closed loop controlled system, (c) establishing mathematic models of at least two stochastic disturbance model spectra of said closed loop control system, (d) producing control modifying signals for influencing said controlling section, said producing step comprising, (e) forming, for a fixed length of time, from said actual operational value an estimated actual operation signal, (f) forming from said estimated actual operation signal a power density spectrum, (g) determining from said power density spectrum a stochastic disturbance spectrum based on first proportions of stochastic disturbances by disregarding second proportions of monochromatic disturbances, (h) comparing said stochastic disturbance spectrum with said stochastic disturbance model spectra and selecting that model spectrum which fits said stochastic disturbance spectrum most closely, (i) dividing said selected model spectrum into first parts corresponding to disturbances of said sensor and into second parts corresponding to variations of the controlled actual value, and (j) using said first and second parts of said selected model spectrum as said control modification for said influencing of said controlling section to increase the accuracy of said closed loop controlled system.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Method and apparatus for improving the accuracy of closed loop controlled systems 원문보기

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Method and apparatus for improving the accuracy of closed loop controlled systems 원문보기

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