Sine on random data analysis method for simulating engine vibration

An apparatus for operating vibrational testing equipment to conduct a vibrational test upon a physical object, said physical object exhibiting acceleration characteristics and fatigue characteristics, said acceleration characteristics including first peak time domain value, comprising:

• peak hold envelope data generation means for generating peak hold envelope data representative of peak hold values of said acceleration characteristics;
• first random floor data generation means for generating first random floor data representative of random noise level of said acceleration characteristics;
• sine tone data generation means connected to said peak hold envelope data generation means and to said first random floor data generation means for generating sine tone data from said acceleration characteristics that substantially approximate said peak hold envelope data, said sine tone data representing at least a sine tone and intersection values between said sine tone and said first random floor data;
• equalization iterative solution determining means for determining second random floor data by an iterative equalization relationship, said iterative equalization relationship maintaining constant said peak hold envelope data and iteratively varying data indicative of area of said first random floor data in accordance with both said first peak time domain value and data indicative of area of said sine tone data;
• third random floor determination means for determining third random floor data based upon said second random floor and a predefined random floor threshold;
• second peak time determination means for determining second peak time domain based on a relationship between data indicative of area of said sine tone data and data indicative of area of said third random floor data;
• second equalization iterative solution determining means for determining fourth random floor by maintaining constant said peak hold envelope data and varying both data indicative of area of said sine tone data and data indicative of area of said third random floor data in accordance with said second peak time domain value;
• and vibrational testing specification generation means coupled to said second equalization iterative solution determining means and to sine tone data generation means for specifying testing parameters to operate said vibrational testing equipment upon said physical object in accordance with said sine tone data and said fourth random floor data.

An apparatus for operating vibrational testing equipment to conduct a vibrational test upon a physical object, said physical object exhibiting acceleration characteristics, said acceleration characteristics including first peak time domain value, comprising:

• peak hold envelope data generation means for generating peak hold envelope data representative of peak hold values of said acceleration characteristics;
• first random floor data generation means for generating first random floor data representative of random noise level of said acceleration characteristics;
• sine tone data generation means connected to said peak hold envelope data generation means and to said first random floor data generation means for generating sine tone data from said acceleration characteristics that substantially approximate said peak hold envelope data, said sine tone data representing at least a sine tone and intersection values between said sine tone and said first random floor data;
• equalization iterative solution determining means for determining a second random floor by maintaining constant said peak hold envelope data and varying both data indicative of area of said sine tone data and data indicative of area of said first random floor data in accordance with said first peak time domain value;
• and vibrational testing specification generation means coupled to equalization iterative solution determining means and to peak hold envelope data generation means and to sine tone data generation means for specifying testing parameters to operate said vibrational testing equipment upon said physical object in accordance with said sine tone data and said second random floor data.

A computer-implemented method for operating vibrational testing equipment to conduct a vibrational test upon a physical object, said physical object exhibiting acceleration characteristics and fatigue characteristics, said acceleration characteristics including first peak time domain value, comprising:

• generating peak hold envelope data representative of peak hold values of said acceleration characteristics;
• generating first random floor data representative of random noise level of said acceleration characteristics;
• generating sine tone data from said acceleration characteristics that substantially approximate said peak hold envelope data, said sine tone data representing at least a sine tone and intersection values between said sine tone and said first random floor data;
• determining second random floor data by an iterative equalization relationship, said iterative equalization relationship maintaining constant said peak hold envelope data and iteratively varying data indicative of area of said first random floor data in accordance with both said first peak time domain value and data indicative of area of said sine tone data;
• and
• specifying testing parameters to operate said vibrational testing equipment upon said physical object in accordance with said sine tone data and said second random floor data.

A computer-implemented method for operating vibrational testing equipment to conduct a vibrational test upon a physical object, said physical object exhibiting acceleration characteristics and fatigue characteristics, said acceleration characteristics including first peak time domain value, comprising:

• generating peak hold envelope data representative of peak hold-values of said acceleration characteristics;
• generating first random floor data representative of random noise level of said acceleration characteristics;
• generating sine tone data from said acceleration characteristics that substantially approximate said peak hold envelope data, said sine tone data representing at least a sine tone and intersection values between said sine tone and said first random floor data;
• determining second random floor data by an iterative equalization relationship, said iterative equalization relationship maintaining constant said peak hold envelope data and iteratively varying data indicative of area of said first random floor data in accordance with both said first peak time domain value and data indicative of area of said sine tone data;
• determining third random floor data based upon said second random floor and a predefined random floor threshold;
• determining second peak time domain based on a relationship between data indicative of area of said sine tone data and data indicative of area of said third random floor data;
• determining fourth random floor by maintaining constant said peak hold envelope data and varying both data indicative of area of said sine tone data and data indicative of area of said third random floor data in accordance with said second peak time domain value;
• and specifying testing parameters to operate said vibrational testing equipment upon said physical object in accordance with said sine tone data and said fourth random floor data.

A computer-implemented method for operating vibrational testing equipment to conduct a vibrational test upon a physical object, said physical object exhibiting acceleration characteristics, said acceleration characteristics including first peak time domain value, comprising:

• generating peak hold envelope data representative of peak hold values of said acceleration characteristics;
• generating first random floor data representative of random noise level of said acceleration characteristics;
• generating sine tone data from said acceleration characteristics that substantially approximate said peak hold envelope data, said sine tone data representing at least a sine tone and intersection values between said sine tone and said first random floor data;
• determining a second random floor by maintaining constant said peak hold envelope data and varying both data indicative of area of said sine tone data and data indicative of area of said first random floor data in accordance with said first peak time domain value;
• and specifying testing parameters to operate said vibrational testing equipment upon said physical object in accordance with said sine tone data and said second random floor data.