Automatic PID controller in which the ratio of the control target value to the control signal is used to optimize performance

Claim 1

A method for performing a proportional-integral-derivative control of a device, comprising the steps of: a) calculating a ratio of a target value of a control signal of a control apparatus to the control signal; b) multiplying the ratio by an operating signal of the device; c) differentiating a deviation-ratio which is a difference between the ratio and a reference value of the ratio; d) adding together the result of said step b) of multiplying and the result of said step c) of differentiating; e) providing the result of said adding to the device as the operating signal; and f) controlling the device using proportional-integral derivative control based on the deviation-ratio value.

Claim 2

A method for performing a proportional-integral-derivative control of a device, comprising the steps of: a) calculating a ratio of a target value of a control signal of a control apparatus to the control signal; b) multiplying the ratio by an operating signal of the device; c) differentiating a deviation-ratio which is a difference between the ratio and a reference value of the ratio; d) adding together the result of said step b) of multiplying and the result of said step c) of differentiating; e) providing the result of said adding to the device as the operating signal; and f) controlling the device using proportional-integral derivative control based on the deviation-ratio value.

Claim 4

A method for performing a proportional-integral control of a device, comprising the steps of: a) calculating a ratio of a target value of a control signal of a control apparatus to the control signal; b) multiplying the ratio by an operating signal of the device; c) providing the result of the multiplying to the device as the operating signal; and d) controlling the device using proportional-integral control based on the ratio value.

Claim 5

A method for performing a proportional-integral control of a device, comprising the steps of: a) calculating a ratio of a target value of a control signal of a control apparatus to the control signal; b) multiplying the ratio by an operating signal of the device; c) providing the result of the multiplying to the device as the operating signal; and d) controlling the device using proportional-integral control based on the ratio value.

Claim 7

An apparatus for supplying an operating signal to a target apparatus having a positive characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a first controller receiving the target signal x s , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU2## b) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; c) a second controller receiving the target signal x s , the present control signal x(n), and the differential parameter kd, and calculating ##EQU3## where Δx.sub.s (n)=x.sub.s (n)-x.sub.x (n-1) Δx(n)=x(n)-x(n-1); and d) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of addition the adding is supplied to the target apparatus as a next operating signal y(n+1).

Claim 8

An apparatus for supplying an operating signal to a target apparatus having a positive characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a first controller receiving the target signal x s , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU2## b) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; c) a second controller receiving the target signal x s , the present control signal x(n), and the differential parameter kd, and calculating ##EQU3## where Δx.sub.s (n)=x.sub.s (n)-x.sub.x (n-1) Δx(n)=x(n)-x(n-1); and d) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of addition the adding is supplied to the target apparatus as a next operating signal y(n+1).

Claim 9

An apparatus for supplying an operating signal to a target apparatus having a positive characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a processor calculating a deviation S x between a doubled target signal 2x s and a present control signal x(n); b) a first controller receiving the deviation X S , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU4## c) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; d) a second controller receiving the deviation X s , the present control signal x(n), and the differential parameter kd, and ##EQU5## calculating where Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1); and e) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of the adding is supplied to the target apparatus as a next operating signal y(n+1), whereby the apparatus controls the next operating signal y(n+1) based on the ratio of said deviation X s to the present control signal x(n) multiplied by the present operating signal y(n).

Claim 10

An apparatus for supplying an operating signal to a target apparatus having a positive characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a processor calculating a deviation S x between a doubled target signal 2x s and a present control signal x(n); b) a first controller receiving the deviation X S , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU4## c) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; d) a second controller receiving the deviation X s , the present control signal x(n), and the differential parameter kd, and ##EQU5## calculating where Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1); and e) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of the adding is supplied to the target apparatus as a next operating signal y(n+1), whereby the apparatus controls the next operating signal y(n+1) based on the ratio of said deviation X s to the present control signal x(n) multiplied by the present operating signal y(n).

Claim 11

An apparatus for supplying an operating signal to a target apparatus having a negative characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a first controller receiving the target signal x s , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU6## b) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; c) a second controller receiving the target signal x s , the present control signal x(n), and the differential parameter kd, and calculating ##EQU7## where Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) Δx(n)=x(n)-x(n-1); and d) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of the adding is supplied to the target apparatus as a next operating signal y(n+1), whereby the apparatus controls the next operating signal y(n+1) based on the ratio of the present control signal to said target signal x s multiplied by the present operating signal y(n).

Claim 12

An apparatus for supplying an operating signal to a target apparatus having a negative characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a first controller receiving the target signal x s , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU6## b) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; c) a second controller receiving the target signal x s , the present control signal x(n), and the differential parameter kd, and calculating ##EQU7## where Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) Δx(n)=x(n)-x(n-1); and d) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of the adding is supplied to the target apparatus as a next operating signal y(n+1), whereby the apparatus controls the next operating signal y(n+1) based on the ratio of the present control signal to said target signal x s multiplied by the present operating signal y(n).

Claim 13

An apparatus for supplying an operating signal to a target apparatus having a negative characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a processor calculating a deviation X s between a doubled target signal 2 and a present control signal x(n); b) a first controller receiving the deviation X s , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU8## c) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; d) a second controller receiving the deviation X s9 the present control signal x(n), and the differential parameter kd, and calculating ##EQU9## where Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) Δx(n)=x(n)-x(n-1); and e) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of the adding is supplied to the target apparatus as a next operating signal y(n+1), whereby the apparatus controls the next operating signal y(n+1) based on the ratio of the present control signal x(n) to said deviation X s multiplied by the present operating signal y(n).

Claim 14

An apparatus for supplying an operating signal to a target apparatus having a negative characteristic that makes a control signal which is controlled by the operating signal and is output from the target apparatus equal to a target signal, comprising: a) a processor calculating a deviation X s between a doubled target signal 2 and a present control signal x(n); b) a first controller receiving the deviation X s , a present operating signal y(n), and a present control signal x(n), and calculating ##EQU8## c) a parameter setting device setting a differential parameter kd of a proportional-integral-derivative control operation based on a deviation between the target value and the present control signal; d) a second controller receiving the deviation X s9 the present control signal x(n), and the differential parameter kd, and calculating ##EQU9## where Δx.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) Δx(n)=x(n)-x(n-1); and e) an adder adding together the results of calculation by said first controller and said second controller, wherein the result of the adding is supplied to the target apparatus as a next operating signal y(n+1), whereby the apparatus controls the next operating signal y(n+1) based on the ratio of the present control signal x(n) to said deviation X s multiplied by the present operating signal y(n).