ARRANGEMENT AND METHOD FOR CONVERTING AN INPUT SIGNAL INTO AN OUTPUT SIGNAL AND FOR GENERATING A PREDEFINED TRANSFER BEHAVIOR BETWEEN SAID INPUT SIGNAL AND SAID OUTPUT SIGNAL

摘要

An arrangement and method for converting an input signal z(t) into a mechanical or acoustical output signal p(t) comprising an electro-magnetic transducer using a coil at a fixed position and a moving armature, a sensor, a parameter measurement device and a controller. The parameter measurement device identifies parameter information P of an nonlinear model of the transducer considering and the saturation and the geometry of the magnetic elements. A diagnostic system reveals the physical causes of signal distortion and generates information for optimizing the design and manufacturing process of this transducer. The controller compensates for nonlinear signal distortion, stabilizes the rest position of the armature and protects the transducer against mechanical and thermal overload.

主权项

1. An arrangement for converting an input signal v(t) into an output signal p(t) and for generating a predefined transfer behavior between said input signal v(t) and said output signal p(t), the arrangement comprising:
an electro-magnetic transducer having a coil and a moving armature, a sensor, which is configured and arranged such to measure at least one state variable of said transducer and to generate a monitored signal (i(t)) representing said measured state variable; a parameter measurement device, which is configured and arranged such to generate based on the monitored signal electro-magnetic parameter information P, wherein said parameter information P describes the following relationshipu=Rei+(L(x,i)i)t+T(x,i)xt in which u denotes an electric input voltage of the electro-magnetic transducer, i denotes an input current of the electro-magnetic transducer, x denotes an instantaneous armature position of the moving armature, Re denotes a DC resistance of the coil, T(x,i) denotes a nonlinear electromagnetic transduction factor of the transducer and L(x,i) denotes a nonlinear coil inductance of the coil which is depends on input current i and instantaneous armature position x.