A Method for Estimating Vehicle Physical Parameters Based on Vibration Test Information
A technology for physical parameter and vibration testing, applied in the field of vehicle physical parameter estimation, can solve the problems of inaccurate results and complicated operation, and achieve the effects of accurate and reliable results, simple operation, and simplified operation difficulty.
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specific Embodiment approach 1
[0059] Specific implementation mode one: as figure 1 and image 3 as shown, figure 1 The application scene of the present invention is illustrated in , the direction of the arrow in the figure is the falling direction of the target vehicle, and each wheel of the target vehicle in the figure is correspondingly provided with a prefabricated block for parking, image 3 The structure of the prefabricated block for parking is shown in , the prefabricated block for parking is a rectangular block, and one end of the prefabricated block is processed with a slope for the wheels to enter.
[0060] Such as figure 2 As shown, when the target vehicle is a quarter vehicle model, the overall target vehicle is divided into static components and dynamic components based on the suspension spring. The static components are the connecting rods in the independent suspension system and the The components of the transmission shaft are all directly or indirectly connected to the vehicle body at o...
specific Embodiment approach 2
[0065] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1. Take the simplified model of a quarter vehicle as an example to obtain the suspension sprung mass m of the target vehicle s and the unsprung mass of the suspension m u : Suspension sprung mass m s and suspension unsprung mass m u The sum is the mass of the whole vehicle m, among which, the mass of the suspension sprung m s and suspension unsprung mass m u Calculated separately through the vehicle configuration design.
[0066] The acceleration generated by the target vehicle during the in-situ vibration refers to the process of causing the target vehicle to generate vertical free vibration and measure the response, as follows:
[0067] Such as figure 1 As shown, first, the wheels of the target vehicle are parked on a preset parking block, and a first acceleration sensor 20 and a second acceleration sensor 21 are respectively arranged at the bottom of the compartment and the cha...
specific Embodiment approach 3
[0088] Specific implementation mode three: as Figure 4 , Figure 5 and Figure 6 As shown, the improved unscented Kalman algorithm based on the recursive window, in the recursive process, within a single recursive window, when k=0, the values of all the quantities to be identified are the initially set initial values. After the first step of recursion ends, y in each window 0 has been corrected 1 time, and the remaining estimating quantity y 1:L-1 It has not been corrected for the time being. When k=1, in the recursive process, the result of the recursive calculation when k=0 in the previous step will be used as the quantity to be estimated y 0:L-1 The initial value of , expand the recursive calculation according to this rule, until the recursion ends when k=L, and output the recursive results of the L quantities to be estimated in the recursive window. Therefore, the first estimator y within the recurrence window i will be updated L times, the second estimator y i+1 ...
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