Table 4 Classes of boundary condition constraints

BBC

Constant boundary constraint (CBC)

Specifies the boundary condition (initial value) of temporally constant attribute

- Mass(B ₁) = M, spring-const(S ₁) = K

- g-acc(GF) = 9.8 [m/s/s]

- In (B, GF) (object B is always in gravity field GF)

- Resistance(R ₁) = R

- Compound-capacitance(C ₁, C ₂) = C

Variable boundary constraint (VBC)

Specifies the boundary condition (initial value) of temporally variable attribute

- vel(B ₁,t ₀)

- Compressed(S ₁,t ₀) (spring S ₁ is initially compressed)

- on(B, S, t ₀) (object B is initially on slope S, but B might leave S)

- Variable-resistance(R ₁, initial) = R _init