CD Parametric Time Response VI

Owning Palette: Time Response VIs

Requires: Control Design and Simulation Module

Calculates parametric information, such as rise time, peak time, settling time, steady-state gain, overshoot, and peak value of an input model based on time response data. If you use the Internal instances of this VI, this VI internally calculates the time response data for which it calculates the parametric information. If you use the External instances of this VI, you must specify the time response data for which this VI calculates the parametric information. Wire data to the State-Space Model or Time Range inputs to determine the polymorphic instance to use or manually select the instance.

Details  

CD Parametric Time Response (State-Space Internal)

	Type of Response Data specifies whether you want this VI to return the time response data of the model states or model outputs. 0 Outputs (default)—Specifies that you want this VI to return the time response data of the model outputs. 1 State trajectories— Specifies that you want this VI to return the time response data of the model states.
	Type of Analysis specifies the type of time response analysis this VI performs on the model. 0 Step Response (default)—Specifies this VI uses a step response to obtain the parametric information. 1 Impulse Response—Specifies this VI uses an impulse response to obtain the parametric information. 2 Initial Response—Specifies this VI uses an initial response to obtain the parametric information.
	State-Space Model contains a mathematical representation of and information about the system of which this VI calculates parametric information.
	Time Range contains information about the initial time, final time, and time step. t0 is the initial time in seconds in the Step Response graph. The default is –1. dt is the constant interval between successive values in the time vector. The default is –1. tf is the final time in seconds up to which this VI calculates the step response. The default is –1.
	Initial Conditions are the initial values the parametric response uses.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Rise Time Thresholds (%) specifies the lower and upper thresholds that define the rise time this VI returns. By default, the rise time is the time required for the system response to rise from 10% to 90% of the settling point. This VI calculates rise time by performing a step response and measuring the time required for the system response to rise from the Lower percentage of the final steady-state value to the Upper percentage of the final steady-state value. If a system has a step response where the initial overshoot is in a direction opposite to that of the final steady-state value, that portion of the step response does not affect the calculation of the rise time. Lower specifies the lower limit of the rise time threshold. The default value is 10%. Upper specifies the upper limit of the rise time threshold. The default value is 90%.
	Settling Time Threshold (%) defines the percentage in which the signal must fall to be within range of the steady-state value. The default is 1%. Therefore, the settling time is the time required for the signal to fall within a 1% range of the steady-state value.
	Time Response displays an XY graph containing the time response of the model.
	Time Response Parametric Data returns the parametric time response data this VI measures from the Time Response Data. Rise Time (s) is the time required for the dynamic system response to rise from 10% of its final value to 90% of its final value. Peak Time (s) is the time required for the dynamic system response to reach the peak value of its first overshoot. Settling Time (s) is the time required for the response to reach 1% of its final value. Overshoot is the dynamic system response value that most exceeds unity, expressed as a percent. Steady-State Gain is the final value of the signal after transient responses decay. Peak value returns the value at which the maximum absolute value of the time response occurs.
	Time Response Data returns the data before this VI parameterizes it. To access the Time Response Data, use the CD Get Time Response Data VI. Time returns the uniformly-spaced time vector against which this VI plots the impulse, initial, or step response and the state trajectories. Outputs Data returns data about the time response of the outputs to the inputs. Refer to the Details section for more information about the Outputs Data. States Data returns data about the time response of the states to the inputs. For transfer function and zero-pole-gain models, this array is empty. Refer to the Details section for more information about the States Data.
	error out contains error information. This output provides standard error out functionality.

CD Parametric Time Response (Transfer Function Internal)

	Type of Analysis specifies the type of time response analysis this VI performs on the model. 0 Step Response (default)—Specifies this VI uses a step response to obtain the parametric information. 1 Impulse Response—Specifies this VI uses an impulse response to obtain the parametric information. 2 Initial Response—Specifies this VI uses an initial response to obtain the parametric information.
	Transfer Function Model contains a mathematical representation of and information about the system of which this VI calculates parametric information.
	Time Range contains information about the initial time, final time, and time step. t0 is the initial time in seconds in the Step Response graph. The default is –1. dt is the constant interval between successive values in the time vector. The default is –1. tf is the final time in seconds up to which this VI calculates the step response. The default is –1.
	Initial Conditions are the initial values the parametric response uses.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Rise Time Thresholds (%) specifies the lower and upper thresholds that define the rise time this VI returns. By default, the rise time is the time required for the system response to rise from 10% to 90% of the settling point. This VI calculates rise time by performing a step response and measuring the time required for the system response to rise from the Lower percentage of the final steady-state value to the Upper percentage of the final steady-state value. If a system has a step response where the initial overshoot is in a direction opposite to that of the final steady-state value, that portion of the step response does not affect the calculation of the rise time. Lower specifies the lower limit of the rise time threshold. The default value is 10%. Upper specifies the upper limit of the rise time threshold. The default value is 90%.
	Settling Time Threshold (%) defines the percentage in which the signal must fall to be within range of the steady-state value. The default is 1%. Therefore, the settling time is the time required for the signal to fall within a 1% range of the steady-state value.
	Time Response displays an XY graph containing the time response of the model.
	Time Response Parametric Data returns the parametric time response data this VI measures from the Time Response Data. Rise Time (s) is the time required for the dynamic system response to rise from 10% of its final value to 90% of its final value. Peak Time (s) is the time required for the dynamic system response to reach the peak value of its first overshoot. Settling Time (s) is the time required for the response to reach 1% of its final value. Overshoot is the dynamic system response value that most exceeds unity, expressed as a percent. Steady-State Gain is the final value of the signal after transient responses decay. Peak value returns the value at which the maximum absolute value of the time response occurs.
	Time Response Data returns the data before this VI parameterizes it. To access the Time Response Data, use the CD Get Time Response Data VI. Time returns the uniformly-spaced time vector against which this VI plots the impulse, initial, or step response and the state trajectories. Outputs Data returns data about the time response of the outputs to the inputs. Refer to the Details section for more information about the Outputs Data. States Data returns data about the time response of the states to the inputs. For transfer function and zero-pole-gain models, this array is empty. Refer to the Details section for more information about the States Data.
	error out contains error information. This output provides standard error out functionality.

CD Parametric Time Response (Zero-Pole-Gain Internal)

	Type of Analysis specifies the type of time response analysis this VI performs on the model. 0 Step Response (default)—Specifies this VI uses a step response to obtain the parametric information. 1 Impulse Response—Specifies this VI uses an impulse response to obtain the parametric information. 2 Initial Response—Specifies this VI uses an initial response to obtain the parametric information.
	Zero-Pole-Gain Model contains a mathematical representation of and information about the system of which this VI calculates parametric information.
	Time Range contains information about the initial time, final time, and time step. t0 is the initial time in seconds in the Step Response graph. The default is –1. dt is the constant interval between successive values in the time vector. The default is –1. tf is the final time in seconds up to which this VI calculates the step response. The default is –1.
	Initial Conditions are the initial values the parametric response uses.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Rise Time Thresholds (%) specifies the lower and upper thresholds that define the rise time this VI returns. By default, the rise time is the time required for the system response to rise from 10% to 90% of the settling point. This VI calculates rise time by performing a step response and measuring the time required for the system response to rise from the Lower percentage of the final steady-state value to the Upper percentage of the final steady-state value. If a system has a step response where the initial overshoot is in a direction opposite to that of the final steady-state value, that portion of the step response does not affect the calculation of the rise time. Lower specifies the lower limit of the rise time threshold. The default value is 10%. Upper specifies the upper limit of the rise time threshold. The default value is 90%.
	Settling Time Threshold (%) defines the percentage in which the signal must fall to be within range of the steady-state value. The default is 1%. Therefore, the settling time is the time required for the signal to fall within a 1% range of the steady-state value.
	Time Response displays an XY graph containing the time response of the model.
	Time Response Parametric Data returns the parametric time response data this VI measures from the Time Response Data. Rise Time (s) is the time required for the dynamic system response to rise from 10% of its final value to 90% of its final value. Peak Time (s) is the time required for the dynamic system response to reach the peak value of its first overshoot. Settling Time (s) is the time required for the response to reach 1% of its final value. Overshoot is the dynamic system response value that most exceeds unity, expressed as a percent. Steady-State Gain is the final value of the signal after transient responses decay. Peak value returns the value at which the maximum absolute value of the time response occurs.
	Time Response Data returns the data before this VI parameterizes it. To access the Time Response Data, use the CD Get Time Response Data VI. Time returns the uniformly-spaced time vector against which this VI plots the impulse, initial, or step response and the state trajectories. Outputs Data returns data about the time response of the outputs to the inputs. Refer to the Details section for more information about the Outputs Data. States Data returns data about the time response of the states to the inputs. For transfer function and zero-pole-gain models, this array is empty. Refer to the Details section for more information about the States Data.
	error out contains error information. This output provides standard error out functionality.

CD Parametric Time Response (State-Space External)

	Type of Response Data specifies whether you want this VI to return the time response data of the model states or model outputs. 0 Outputs (default)—Specifies that you want this VI to return the time response data of the model outputs. 1 State trajectories— Specifies that you want this VI to return the time response data of the model states.
	State-Space Model contains a mathematical representation of and information about the system of which this VI calculates parametric information.
	Time Response Data specifies the time response data for which this VI calculates the parametric information. You can wire the Impulse Response Data output of the CD Impulse Response VI, the Initial Response Data output of the CD Initial Response VI, or the Step Response Data output of the CD Step Response VI to this input. Time specifies the uniformly-spaced time vector. Outputs Data specifies data about the time response of the outputs to the inputs. States Data specifies information about the time response of the states to the inputs.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Rise Time Thresholds (%) specifies the lower and upper thresholds that define the rise time this VI returns. By default, the rise time is the time required for the system response to rise from 10% to 90% of the settling point. This VI calculates rise time by performing a step response and measuring the time required for the system response to rise from the Lower percentage of the final steady-state value to the Upper percentage of the final steady-state value. If a system has a step response where the initial overshoot is in a direction opposite to that of the final steady-state value, that portion of the step response does not affect the calculation of the rise time. Lower specifies the lower limit of the rise time threshold. The default value is 10%. Upper specifies the upper limit of the rise time threshold. The default value is 90%.
	Settling Time Threshold (%) defines the percentage in which the signal must fall to be within range of the steady-state value. The default is 1%. Therefore, the settling time is the time required for the signal to fall within a 1% range of the steady-state value.
	Time Response Parametric Data returns the parametric time response data this VI measures from the Time Response Data. Rise Time (s) is the time required for the dynamic system response to rise from 10% of its final value to 90% of its final value. Peak Time (s) is the time required for the dynamic system response to reach the peak value of its first overshoot. Settling Time (s) is the time required for the response to reach 1% of its final value. Overshoot is the dynamic system response value that most exceeds unity, expressed as a percent. Steady-State Gain is the final value of the signal after transient responses decay. Peak value returns the value at which the maximum absolute value of the time response occurs.
	error out contains error information. This output provides standard error out functionality.

CD Parametric Time Response (Transfer Function External)

	Transfer Function Model contains a mathematical representation of and information about the system of which this VI calculates parametric information.
	Time Response Data specifies the time response data for which this VI calculates the parametric information. You can wire the Impulse Response Data output of the CD Impulse Response VI, the Initial Response Data output of the CD Initial Response VI, or the Step Response Data output of the CD Step Response VI to this input. Time specifies the uniformly-spaced time vector. Outputs Data specifies data about the time response of the outputs to the inputs. States Data specifies information about the time response of the states to the inputs.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Rise Time Thresholds (%) specifies the lower and upper thresholds that define the rise time this VI returns. By default, the rise time is the time required for the system response to rise from 10% to 90% of the settling point. This VI calculates rise time by performing a step response and measuring the time required for the system response to rise from the Lower percentage of the final steady-state value to the Upper percentage of the final steady-state value. If a system has a step response where the initial overshoot is in a direction opposite to that of the final steady-state value, that portion of the step response does not affect the calculation of the rise time. Lower specifies the lower limit of the rise time threshold. The default value is 10%. Upper specifies the upper limit of the rise time threshold. The default value is 90%.
	Settling Time Threshold (%) defines the percentage in which the signal must fall to be within range of the steady-state value. The default is 1%. Therefore, the settling time is the time required for the signal to fall within a 1% range of the steady-state value.
	Time Response Parametric Data returns the parametric time response data this VI measures from the Time Response Data. Rise Time (s) is the time required for the dynamic system response to rise from 10% of its final value to 90% of its final value. Peak Time (s) is the time required for the dynamic system response to reach the peak value of its first overshoot. Settling Time (s) is the time required for the response to reach 1% of its final value. Overshoot is the dynamic system response value that most exceeds unity, expressed as a percent. Steady-State Gain is the final value of the signal after transient responses decay. Peak value returns the value at which the maximum absolute value of the time response occurs.
	error out contains error information. This output provides standard error out functionality.

CD Parametric Time Response (Zero-Pole-Gain External)

	Zero-Pole-Gain Model contains a mathematical representation of and information about the system of which this VI calculates parametric information.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Rise Time Thresholds (%) specifies the lower and upper thresholds that define the rise time this VI returns. By default, the rise time is the time required for the system response to rise from 10% to 90% of the settling point. This VI calculates rise time by performing a step response and measuring the time required for the system response to rise from the Lower percentage of the final steady-state value to the Upper percentage of the final steady-state value. If a system has a step response where the initial overshoot is in a direction opposite to that of the final steady-state value, that portion of the step response does not affect the calculation of the rise time. Lower specifies the lower limit of the rise time threshold. The default value is 10%. Upper specifies the upper limit of the rise time threshold. The default value is 90%.
	Settling Time Threshold (%) defines the percentage in which the signal must fall to be within range of the steady-state value. The default is 1%. Therefore, the settling time is the time required for the signal to fall within a 1% range of the steady-state value.
	Time Response Parametric Data returns the parametric time response data this VI measures from the Time Response Data. Rise Time (s) is the time required for the dynamic system response to rise from 10% of its final value to 90% of its final value. Peak Time (s) is the time required for the dynamic system response to reach the peak value of its first overshoot. Settling Time (s) is the time required for the response to reach 1% of its final value. Overshoot is the dynamic system response value that most exceeds unity, expressed as a percent. Steady-State Gain is the final value of the signal after transient responses decay. Peak value returns the value at which the maximum absolute value of the time response occurs.
	error out contains error information. This output provides standard error out functionality.

CD Parametric Time Response Details

This VI supports delays when calculating the dynamic characteristics of a system. Refer to the LabVIEW Control Design User Manual for more information about delays.