Driver for a function unit parametrized by a number of input variables

• US 20060229747A1
• Filed: 03/16/2006
• Published: 10/12/2006
• Est. Priority Date: 03/17/2005
• Status: Active Grant

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Hildebrand, Thomas, Rose, Marc, Boehler, Bert, Clement, Jean-Marie
• Granted Patent: US 7,925,685 B2
• Time in Patent Office: Days
• US Class Current: 700/67
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/23174 Display of parameter and several suggested values for that parameter

Abstract

A control system, a method of operating the same, and a method for setting up the same are disclosed for simplified driving of a function unit parametrized by a plurality of input variables. The control system includes a setting unit and a control unit, the setting unit being used to set a number of prescribed control parameters and to feed them to the control unit. A value tuple that is fed to the function unit for the parametrization thereof is determined by the control unit as a function of the controlled variables in accordance with a stored interpolation function based on interpolation points. To set up the control system, it is provided to select a number of value tuples of the input variables as interpolation points from a parameter space defined by the input variables, and to determine the interpolation function in such a way that it defines a continuous subspace of the parameter space which has a dimensionality corresponding to the number of controlled variables and contains every interpolation point.

Claims

1. A method for setting up a control system for a function unit that is parametrized by a plurality of input variables, comprising:

selecting a number of value tuples of the input variables as interpolation points from a parameter space defined by the input variables; and

determining an interpolation function that is dependent on at least one controlled variable and defines a continuous subspace of the parameter space which has a dimensionality corresponding to the number of controlled variables, and contains every interpolation point.

2. The method as claimed in claim 1, wherein the interpolation function is determined by,

stipulating the subspace inside the parameter space,

stipulating, for each dimension of the subspace, a coordinate corresponding to a controlled variable, and

stipulating for each coordinate, a progress function by which each value of the associated controlled variable is allocated a value of the coordinate.

3. The method as claimed in claim 2, wherein the subspace is stipulated by applying a spline interpolation to the interpolation points.

4. The method as claimed in claim 2, wherein the subspace is stipulated by applying a volume minimization algorithm.

5. The method as claimed in claim 2, wherein at least two controlled variables are included, to which orthogonal coordinates are allocated.

6. The method as claimed in claim 2, wherein at least one progress function is nonlinear.

9. The method as claimed in claim 3, wherein at least two controlled variables are included, to which orthogonal coordinates are allocated.

10. The method as claimed in claim 3, wherein at least one progress function is nonlinear.

12. A computer program product, including a computer program, adapted to, when executed on a computer, cause the computer to carry out the method as claimed in claim 1.

13. A computer readable medium including program segments for, when executed on a computer, causing the computer to implement the method of claim 1.

7. A method for driving a function unit that is parametrized by a plurality of input variables, the method comprising:

setting one value, in each case, for a number of prescribed controlled variables; and

determining, as a function of the set value of each controlled variable, a value for each input variable in accordance with a stored interpolation function and feeding the value to the function unit, the interpolation function defining a continuous subspace of the parameter space defined by the input variables, which includes a number of prescribed interpolation points.

14. A computer program product, including a computer program, adapted to, when executed on a computer, cause the computer to carry out the method as claimed in claim 7.

15. A computer readable medium including program segments for, when executed on a computer, causing the computer to implement the method of claim 7.

8. A control system for driving a function unit parametrized by a plurality of input variables, comprising:

a setting unit, to set a value for a number of prescribed controlled variables; and

a control unit, designed to determine a value for each input variable as a function of the or each controlled variable in accordance with a stored interpolation function, and to feed the value to the function unit, the interpolation function defining a continuous subspace of the parameter space defined by the input variables, which includes a number of prescribed interpolation points.

11. A control system for driving a function unit parametrized by a plurality of input variables, comprising:

means for setting a value for a number of prescribed controlled variables; and

means for determining a value for each input variable as a function of the or each controlled variable in accordance with a stored interpolation function, and for feeding the value to the function unit, the interpolation function defining a continuous subspace of the parameter space defined by the input variables, which includes a number of prescribed interpolation points.