VEHICLE CHARACTERISTIC OPTIMIZATION DEVICE, VEHICLE CHARACTERISTIC OPTIMIZATION METHOD, AND PROGRAM

To allow for improving vehicle characteristics of even a vehicle having individual differences.SOLUTION: Time series vibration data of each of a plurality of vibratory elements existing in a vehicle is acquired (71), the time series vibration data is converted to vibration data for time and frequency with respect to each of the plurality of vibratory elements (73), a plurality of pieces of vibration data are aggregated to generate three-dimensional data represented by three dimensions of time, frequency, and vibratory element existence position (74), factorization is performed on the three-dimensional data to calculate a contribution of each of existence positions of the plurality of vibratory elements to each of factors (75), an objective function about vehicle characteristic evaluation and a design variable are set on the basis of contributions and a value of the design variable giving an optimal value of the objective function is obtained (76), and vibration characteristics of vibratory elements relating to an evaluation object position of the vehicle are regulated (77).SELECTED DRAWING: Figure 4 【課題】個体差がある車両であっても、車両特性を向上することができる。【解決手段】車両に存在する複数の振動要素各々の時系列振動データを取得し（７１）、複数の振動要素毎に時間及び周波数に対する振動データに変換し（７３）、複数の振動データを集約し、時間、周波数及び振動要素が存在する位置の３つの次元で表される３次元データを作成し（７４）、３次元データに対して因子分解を行い、因子各々に対する複数の振動要素が存在する位置各々の寄与度を算出し（７５）、寄与度に基づいて、車両特性評価に関する目的関数と、設計変数とを設定し、かつ目的関数の最適値を与える設計変数の値を求め（７６）、車両の評価対象位置に関係する振動要素の振動特性を調整する（７７）。【選択図】図４