On-board prediction of active suspension power consumption is important in securing fast engine response and avoiding potential vehicle hesitation or surge. In this study the problem is considered within the context of a hydraulic design and its detailed non-linear mathematical representation encompassing the control laws and the various system components. The suspension power consumption signal is shown to be non-stationary, and short-term averaging is used as a stationarity-imposing transformation. A number of predictor design factors are then considered: The use of the wheel vertical acceleration signal as a leading indicator; the use of various predictor realizations; and the use of various estimation models. The relative merits, in terms of computational complexity, expected accuracy, stability, initial condition effects, and parameter estimator implementation, of the potential designs are studied, and an Indirect and Direct predictors are selected. The latter is based on the direct estimation of the predictor parameters from measured data by using a new linear estimator particularly suitable for on-board implementation. The prediction results obtained the accurate, with the actual power consumption always lying within the prediction 95 % probability limits, and the Indirect and Direct schemes being comparable in terms of the achievable accuracy.
On the problem of on-board prediction of power consumption in automobile active suspension systems
Zum Problem der An-Bord-Vorhersage des Energieverbrauchs von aktiven Radaufhängungen in Kraftfahrzeugen
1993
12 Seiten, 11 Bilder, 6 Tabellen, 16 Quellen
Conference paper
English
On the Problem of On-Board Prediction of Power Consumption in Automobile Active Suspension Systems
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