METHOD FOR DETERMINING UNSTABLE BEHAVIOUR OF A TRAILER AND METHOD FOR STABILISING A TRAILER, AND EVALUATION UNIT AND VEHICLE COMBINATION

The invention relates to a method for determining unstable behaviour of a trailer (2a) of an n-membered vehicle combination (100a). According to the invention: - at least one actual variable (n AL, n AR, n BL, n BR, GAIst, VAIst) relating to the driving dynamics of the trailer (2a) is determined, this variable characterising the actual driving dynamics condition of the trailer (2a) and being obtained in accordance with a measurement via at least one sensor (9A, 13A) in the trailer (2a); - at least one target variable relating to the driving dynamics of the trailer (2a) is determined, wherein this results from the actual variables (n ZL, n ZR, GZIst, v Z) relating to the driving dynamics of the towing vehicle (1a) by using a kinematic model in accordance with geometric variables (g K, RSA, RSZ, DL) of the vehicle combination (100a); and - at least one of the actual variables (GAIst, VAIst) relating to the driving dynamics of the trailer (2a) is compared to the at least one target variable relating to the drivi