New User Defined Expression control model

[manu-aesim]

A now control model with two parameters :

• Number of inputs (Integer)
• Expression (string)

This control block will allow the user to write any mathematical expression that will be evaluated at every time-step/iterations.

Example of expressions to be supported:

• sin(2*inputs[0])
• max(inputs[0], inputs[1])
• sqrt(inputs[0]ˆ2 + inputs[1]ˆ2)

Supported functions are:

Name	Argc.	Explanation
sin	1	sine function
cos	1	cosine function
tan	1	tangens function
asin	1	arcus sine function
acos	1	arcus cosine function
atan	1	arcus tangens function
sinh	1	hyperbolic sine function
cosh	1	hyperbolic cosine
tanh	1	hyperbolic tangens function
asinh	1	hyperbolic arcus sine function
acosh	1	hyperbolic arcus tangens function
atanh	1	hyperbolic arcur tangens function
log2	1	logarithm to the base 2
log10	1	logarithm to the base 10
log	1	logarithm to base e (2.71828...)
ln	1	logarithm to base e (2.71828...)
exp	1	e raised to the power of x
sqrt	1	square root of a value
sign	1	sign function -1 if x<0; 1 if x>0
rint	1	round to nearest integer
abs	1	absolute value
min	var.	min of all arguments
max	var.	max of all arguments
sum	var.	sum of all arguments
avg	var.	mean value of all arguments

Supported operators are:

Operator	Description	Priority
=	assignement *	0
||	logical or	1
&&	logical and	2
|	bitwise or	3
&	bitwise and	4
<=	less or equal	5
>=	greater or equal	5
!=	not equal	5
==	equal	5
>	greater than	5
<	less than	5
+	addition	6
-	subtraction	6
*	multiplication	7
/	division	7
^	raise x to the power of y	8

Development Progress

• model [ ]
• test [ ]
• documentation [ ]

Note

It is important to note that this device does not trigger discontinuity events. It should be used for "continuous" variables and not for detecting events requiring small time steps. For example, it should not be used in place of a comparator controlling a switch.

[jcornau]

Development Progress

model ok test ok documentation ok

[jcornau]

Notes: Operators are not considered:

• "=" (assignment)
• "&" (bitwise and
• "|" (bitwise or)